How to get client's IP address using JavaScript?

I need to somehow retrieve the client's IP address using JavaScript; no server side code, not even SSI.

However, I'm not against using a free 3rd party script/service.

I would use a web service that can return JSON (along with jQuery to make things simpler). Below are all the active free IP lookup services I could find and the information they return. If you know of others, then please add a comment and I'll update this answer.

---

Abstract

let apiKey = '1be9a6884abd4c3ea143b59ca317c6b2';
$.getJSON('https://ipgeolocation.abstractapi.com/v1/?api_key=' + apiKey, function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• 10,000 requests per month
• Requires registration to get your API key

---

BigDataCloud

// Base
let apiKey = 'd9e53816d07345139c58d0ea733e3870';
$.getJSON('https://api.bigdatacloud.net/data/ip-geolocation?key=' + apiKey, function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

// Base + Confidence Area
let apiKey = 'd9e53816d07345139c58d0ea733e3870';
$.getJSON('https://api.bigdatacloud.net/data/ip-geolocation-with-confidence?key=' + apiKey, function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

// Base + Confidence Area + Hazard Report
let apiKey = 'd9e53816d07345139c58d0ea733e3870';
$.getJSON('https://api.bigdatacloud.net/data/ip-geolocation-full?key=' + apiKey, function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• 10,000 requests per month
• Requires registration to get your API key

---

Cloudflare

$.get('https://www.cloudflare.com/cdn-cgi/trace', function(data) {
  // Convert key-value pairs to JSON
  // https://stackoverflow.com/a/39284735/452587
  data = data.trim().split('\n').reduce(function(obj, pair) {
    pair = pair.split('=');
    return obj[pair[0]] = pair[1], obj;
  }, {});
  console.log(data);
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• Returns plain text
• Returns only IPv6 address if you have that

---

DB-IP

Try it: https://api.db-ip.com/v2/free/self

$.getJSON('https://api.db-ip.com/v2/free/self', function(data) {
  console.log(JSON.stringify(data, null, 2));
});

Returns:

{
  "ipAddress": "116.12.250.1",
  "continentCode": "AS",
  "continentName": "Asia",
  "countryCode": "SG",
  "countryName": "Singapore",
  "city": "Singapore (Queenstown Estate)"
}

Limitations:

• 1,000 requests per day
• Requires non-null Origin request header

---

Geobytes

Try it: http://gd.geobytes.com/GetCityDetails

$.getJSON('http://gd.geobytes.com/GetCityDetails?callback=?', function(data) {
  console.log(JSON.stringify(data, null, 2));
});

Returns:

{
  "geobytesforwarderfor": "",
  "geobytesremoteip": "116.12.250.1",
  "geobytesipaddress": "116.12.250.1",
  "geobytescertainty": "99",
  "geobytesinternet": "SA",
  "geobytescountry": "Saudi Arabia",
  "geobytesregionlocationcode": "SASH",
  "geobytesregion": "Ash Sharqiyah",
  "geobytescode": "SH",
  "geobyteslocationcode": "SASHJUBA",
  "geobytescity": "Jubail",
  "geobytescityid": "13793",
  "geobytesfqcn": "Jubail, SH, Saudi Arabia",
  "geobyteslatitude": "27.004999",
  "geobyteslongitude": "49.660999",
  "geobytescapital": "Riyadh ",
  "geobytestimezone": "+03:00",
  "geobytesnationalitysingular": "Saudi Arabian ",
  "geobytespopulation": "22757092",
  "geobytesnationalityplural": "Saudis",
  "geobytesmapreference": "Middle East ",
  "geobytescurrency": "Saudi Riyal",
  "geobytescurrencycode": "SAR",
  "geobytestitle": "Saudi Arabia"
}

Limitations:

• 16,384 requests per hour
• No SSL (https) with the free plan
• Can return the wrong location

---

GeoIPLookup.io

$.getJSON('https://json.geoiplookup.io/?callback=?', function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• 10,000 requests per hour
• Free plan only for non-commercial use
• Returns only IPv6 address if you have that

---

geoPlugin

Try it: http://www.geoplugin.net/json.gp

$.getJSON('http://www.geoplugin.net/json.gp', function(data) {
  console.log(JSON.stringify(data, null, 2));
});

Returns:

{
  "geoplugin_request": "116.12.250.1",
  "geoplugin_status": 200,
  "geoplugin_credit": "Some of the returned data includes GeoLite data created by MaxMind, available from <a href=\\'http://www.maxmind.com\\'>http://www.maxmind.com</a>.",
  "geoplugin_city": "Singapore",
  "geoplugin_region": "Singapore (general)",
  "geoplugin_areaCode": "0",
  "geoplugin_dmaCode": "0",
  "geoplugin_countryCode": "SG",
  "geoplugin_countryName": "Singapore",
  "geoplugin_continentCode": "AS",
  "geoplugin_latitude": "1.2931",
  "geoplugin_longitude": "103.855797",
  "geoplugin_regionCode": "00",
  "geoplugin_regionName": "Singapore (general)",
  "geoplugin_currencyCode": "SGD",
  "geoplugin_currencySymbol": "&#36;",
  "geoplugin_currencySymbol_UTF8": "$",
  "geoplugin_currencyConverter": 1.4239
}

Limitations:

• 120 requests per minute
• No SSL (https) with the free plan

---

Hacker Target

$.get('https://api.hackertarget.com/geoip/?q=116.12.250.1', function(data) {
  // Convert key-value pairs to JSON
  // https://stackoverflow.com/a/39284735/452587
  data = data.trim().split('\n').reduce(function(obj, pair) {
    pair = pair.split(': ');
    return obj[pair[0]] = pair[1], obj;
  }, {});
  console.log(data);
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• 100 requests per day
• Requires IP address parameter
• Returns plain text

---

ipapi

Try it: https://ipapi.co/json/

$.getJSON('https://ipapi.co/json/', function(data) {
  console.log(JSON.stringify(data, null, 2));
});

Returns:

{
  "ip": "116.12.250.1",
  "city": "Singapore",
  "region": "Central Singapore Community Development Council",
  "country": "SG",
  "country_name": "Singapore",
  "postal": null,
  "latitude": 1.2855,
  "longitude": 103.8565,
  "timezone": "Asia/Singapore"
}

Limitations:

• 1,000 requests per day
• Requires SSL (https)
• Requires non-null Origin request header
• Returns only IPv6 address if you have that

---

IP-API

Try it: http://ip-api.com/json

$.getJSON('http://ip-api.com/json', function(data) {
  console.log(JSON.stringify(data, null, 2));
});

Returns:

{
  "as": "AS3758 SingNet",
  "city": "Singapore",
  "country": "Singapore",
  "countryCode": "SG",
  "isp": "SingNet Pte Ltd",
  "lat": 1.2931,
  "lon": 103.8558,
  "org": "Singapore Telecommunications",
  "query": "116.12.250.1",
  "region": "01",
  "regionName": "Central Singapore Community Development Council",
  "status": "success",
  "timezone": "Asia/Singapore",
  "zip": ""
}

Limitations:

• 150 requests per minute
• No SSL (https) with the free plan

---

ipdata

let apiKey = 'be0f755b93290b4c100445d77533d291763a417c75524e95e07819ad';
$.getJSON('https://api.ipdata.co?api-key=' + apiKey, function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• 1,500 requests per day
• Requires registration to get your API key
• Requires SSL (https)

---

IP Find

let apiKey = '50e887ce-e3bb-4f00-a9b9-667597db5539';
$.getJSON('https://ipfind.co/me?auth=' + apiKey, function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• 300 requests per day
• Requires registration to get your API key

---

ipgeolocation

let apiKey = 'f8e0b361e8f4405c94613ab534959fdf';
$.getJSON('https://api.ipgeolocation.io/ipgeo?apiKey=' + apiKey, function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• 50,000 requests per month
• Requires registration to get your API key
• Returns only IPv6 address if you have that

---

ipify

$.getJSON('https://api.ipify.org?format=jsonp&callback=?', function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• None

---

IPInfoDB

let apiKey = '25864308b6a77fd90f8bf04b3021a48c1f2fb302a676dd3809054bc1b07f5b42';
$.getJSON('https://api.ipinfodb.com/v3/ip-city/?format=json&key=' + apiKey, function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• Two requests per second
• Requires registration to get your API key

---

ipinfo.io

$.getJSON('https://ipinfo.io/json', function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• 50,000 requests per month

---

ipregistry

$.getJSON('https://api.ipregistry.co/?key=tryout', function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• Free plan includes 100,000 requests
• Requires registration to get your API key
• Returns only IPv6 address if you have that

---

ipstack (formerly freegeoip.net)

Try it: http://api.ipstack.com/?access_key=

$.getJSON('http://api.ipstack.com/<ip_address>?access_key=<your_api_key>', function(data) {
  console.log(JSON.stringify(data, null, 2));
});

Returns:

{
  "ip": "116.12.250.1",
  "type": "ipv4",
  "continent_code": "AS",
  "continent_name": "Asia",
  "country_code": "SG",
  "country_name": "Singapore",
  "region_code": "01",
  "region_name": "Central Singapore Community Development Council",
  "city": "Singapore",
  "zip": null,
  "latitude": 1.2931,
  "longitude": 103.8558,
  "location": {
    "geoname_id": 1880252,
    "capital": "Singapore",
    "languages": [
      {
        "code": "en",
        "name": "English",
        "native": "English"
      },
      {
        "code": "ms",
        "name": "Malay",
        "native": "Bahasa Melayu"
      },
      {
        "code": "ta",
        "name": "Tamil",
        "native": "தமிழ்"
      },
      {
        "code": "zh",
        "name": "Chinese",
        "native": "中文"
      }
    ],
    "country_flag": "http://assets.ipstack.com/flags/sg.svg",
    "country_flag_emoji": "🇸🇬",
    "country_flag_emoji_unicode": "U+1F1F8 U+1F1EC",
    "calling_code": "65",
    "is_eu": false
  }
}

Limitations:

• 10,000 requests per month
• Requires IP address parameter
• Requires registration to get your API key
• No SSL (https) with the free plan

---

jsonip.com

$.getJSON('https://jsonip.com/', function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• Returns only IPv6 address if you have that

---

JSON Test

Try it: http://ip.jsontest.com/

$.getJSON('http://ip.jsontest.com/', function(data) {
  console.log(JSON.stringify(data, null, 2));
});

Returns:

{
  "ip": "116.12.250.1"
}

Limitations:

• No SSL (https)
• Returns only IPv6 address if you have that

---

Snoopi.io

let apiKey = 'ed5ebbeba257b8f262a6a9bbc0ec678e';
$.getJSON('https://api.snoopi.io/116.12.250.1?apikey=' + apiKey, function(data) {
  console.log(JSON.stringify(data, null, 2));
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>

Limitations:

• 10,000 requests per month
• 1 request every 2 seconds
• Requires IP address parameter
• Requires registration to get your API key

---

VANILLA JAVASCRIPT

With modern browsers, you can use the native Fetch API instead of relying on jQuery's $.getJSON(). Here's an example:

let apiKey = '1be9a6884abd4c3ea143b59ca317c6b2';
// Make the request
fetch('https://ipgeolocation.abstractapi.com/v1/?api_key=' + apiKey)
  // Extract JSON body content from HTTP response
  .then(response => response.json())
  // Do something with the JSON data
  .then(data => {
    console.log(JSON.stringify(data, null, 2))
  });

NOTES

• Since these are all free services, who knows when/if they will be taken offline down the road (exhibit A: Telize).
• Most of these services also offer a paid tier in case you want more features and stability.
• As @skobaljic noted in the comments below, the request quotas are mostly academic since calls are happening client-side and most end users will never exceed their quota.
• Some services don't have runnable snippets because they don't allow SSL connections in the free plan or require a non-null Origin request header (StackOverflow snippets are forced to use https and have Origin: null in the request headers).

UPDATES

• 2/1/2016: Removed Telize (no longer offers free plan)
• 4/18/2016: Removed freegeoip.net (out of service)
• 4/26/2016: Added DB-IP
• 4/26/2016: Added Hacker Target
• 7/6/2016: Reinstated freegeoip.net
• 7/6/2016: Removed ip-json.rhcloud.com (dead link)
• 12/21/2016: Removed Hacker Target (out of service)
• 2/10/2017: Added Nekudo
• 4/20/2017: Added ipapi (thanks Ahmad Awais)
• 4/24/2017: Reinstated Hacker Target
• 4/24/2017: Removed Snoopi.io (out of service)
• 7/16/2017: Added limitation "No SSL (https) with the free plan"
• 7/16/2017: Added IP Find (thanks JordanC)
• 9/25/2017: Added Stupid Web Tools (thanks Cœur)
• 3/16/2018: Added ipdata (thanks Jonathan)
• 4/14/2018: Renamed freegeoip.net to ipstack (thanks MA-Maddin)
• 4/16/2018: Added GeoIPLookup.io (thanks Rob Waa)
• 6/11/2018: Added ipgeolocation (thanks Ejaz Ahmed)
• 7/31/2019: Added ipregistry (thanks Laurent)
• 8/16/2019: Added SmartIP.io (thanks kevinj)
• 8/22/2019: Removed Stupid Web Tools (out of service)
• 12/10/2019: Added Cloudflare
• 1/9/2020: Removed SmartIP.io (out of service)
• 11/6/2020: Added Abstract
• 11/13/2020: Added AstroIP.co
• 4/13/2021: Replaced code samples with snippets (was getting close to 30k character limit)
• 4/13/2021: Added code to convert key-value pairs to JSON for plain text responses
• 4/13/2021: Added limitation "Requires non-null Origin request header"
• 4/13/2021: Added BigDataCloud
• 4/13/2021: Reinstated Snoopi.io
• 4/13/2021: Removed AstroIP.co (out of service)
• 4/13/2021: Removed Nekudo (now part of ipapi)

UPDATE 2021:

As shown recently by a new Github repository, webrtc-ip, you can now leak a user's public IP address using WebRTC. Sadly, this leak does not work for private IPs, due to the gradual shift to mDNS (at least for WebRTC), completely explained here. However, here's a working demo:

getIPs().then(res => document.write(res.join('\n')))

<script src="https://cdn.jsdelivr.net/gh/joeymalvinni/webrtc-ip/dist/bundle.dev.js"></script>

The compiled source code for this repository can be found here.

---

(Previously) Final Update

This solution would not longer work because browsers are fixing webrtc leak: for more info on that read this other question: https://stackoverflow.com/questions/56755747/rtcicecandidate-no-longer-returning-ip

---

Update: I always wanted to make a min/ uglified version of the code, so here is an ES6 Promise code:

var findIP = new Promise(r=>{var w=window,a=new (w.RTCPeerConnection||w.mozRTCPeerConnection||w.webkitRTCPeerConnection)({iceServers:[]}),b=()=>{};a.createDataChannel("");a.createOffer(c=>a.setLocalDescription(c,b,b),b);a.onicecandidate=c=>{try{c.candidate.candidate.match(/([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/g).forEach(r)}catch(e){}}})

/*Usage example*/
findIP.then(ip => document.write('your ip: ', ip)).catch(e => console.error(e))

Note: This new minified code would return only single IP if you want all the IPs of the user( which might be more depending on his network), use the original code...

---

thanks to WebRTC, it is very easy to get local IP in WebRTC supported browsers( at least for now). I have modified the source code, reduced the lines, not making any stun requests since you only want Local IP, not the Public IP, the below code works in latest Firefox and Chrome, just run the snippet and check for yourself:

function findIP(onNewIP) { //  onNewIp - your listener function for new IPs
  var myPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection; //compatibility for firefox and chrome
  var pc = new myPeerConnection({iceServers: []}),
    noop = function() {},
    localIPs = {},
    ipRegex = /([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/g,
    key;

  function ipIterate(ip) {
    if (!localIPs[ip]) onNewIP(ip);
    localIPs[ip] = true;
  }
  pc.createDataChannel(""); //create a bogus data channel
  pc.createOffer(function(sdp) {
    sdp.sdp.split('\n').forEach(function(line) {
      if (line.indexOf('candidate') < 0) return;
      line.match(ipRegex).forEach(ipIterate);
    });
    pc.setLocalDescription(sdp, noop, noop);
  }, noop); // create offer and set local description
  pc.onicecandidate = function(ice) { //listen for candidate events
    if (!ice || !ice.candidate || !ice.candidate.candidate || !ice.candidate.candidate.match(ipRegex)) return;
    ice.candidate.candidate.match(ipRegex).forEach(ipIterate);
  };
}



var ul = document.createElement('ul');
ul.textContent = 'Your IPs are: '
document.body.appendChild(ul);

function addIP(ip) {
  console.log('got ip: ', ip);
  var li = document.createElement('li');
  li.textContent = ip;
  ul.appendChild(li);
}

findIP(addIP);

<h1> Demo retrieving Client IP using WebRTC </h1>

what is happening here is, we are creating a dummy peer connection, and for the remote peer to contact us, we generally exchange ice candidates with each other. And reading the ice candidates( from local session description and onIceCandidateEvent) we can tell the IP of the user.

where I took code from --> Source

You can, relaying it via server side with JSONP

And while googling to find one, found it here on SO https://stackoverflow.com/questions/102605/can-i-lookup-the-ip-address-of-a-hostname-from-javascript

<script type="application/javascript">
    function getip(json){
      alert(json.ip); // alerts the ip address
    }
</script>
   
<script type="application/javascript" src="http://www.telize.com/jsonip?callback=getip"></script>

> Note : The telize.com API has permanently shut down as of November 15th, 2015.

Most of the answers here "work around" the need for server-side code by... Hitting someone else's server. Which is a totally valid technique, unless you actually do need to get the IP address without hitting a server.

Traditionally this wasn't possible without some sort of a plugin (and even then, you'd likely get the wrong IP address if you were behind a NAT router), but with the advent of WebRTC it is actually possible to do this... If you're targeting browsers that support WebRTC (currently: Firefox, Chrome and Opera).

Please read mido's answer for details on how you can retrieve useful client IP addresses using WebRTC.

Look no further

Check out http://www.ipify.org/

According to them: > - You can use it without limit (even if you're doing millions of requests per minute). > - ipify is completely open source (check out the GitHub repository).

Here's a working JS example (instead of wondering why this answer has so few votes, try it yourself to see it in action):

<script>
function getIP(json) {
  alert("My public IP address is: " + json.ip);
}
</script>
<script src="https://api.ipify.org?format=jsonp&callback=getIP"></script>

Too lazy to copy/paste? I like it. Here's a  demo

Too lazy to click? :O

> Note: Turn off Adblock Plus / uBlock & co before running the demo .. otherwise, it just won't work.

I have nothing to do with the IPify team. I just think it's ridiculously cool that someone would provide such a service for the general good.

You can't. You'd have to ask a server.

You can do an ajax call to hostip.info or a similar service...

function myIP() {
	if (window.XMLHttpRequest) xmlhttp = new XMLHttpRequest();
	else xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");

	xmlhttp.open("GET","http://api.hostip.info/get_html.php",false);
	xmlhttp.send();

	hostipInfo = xmlhttp.responseText.split("\n");

	for (i=0; hostipInfo.length >= i; i++) {
		ipAddress = hostipInfo[i].split(":");
		if ( ipAddress[0] == "IP" ) return ipAddress[1];
	}

	return false;
}

As a bonus, geolocalisation information is returned in the same call.

Try this

$.get("http://ipinfo.io", function(response) {
    alert(response.ip);
}, "jsonp");

OR

$(document).ready(function () {
    $.getJSON("http://jsonip.com/?callback=?", function (data) {
        console.log(data);
        alert(data.ip);
    });
});

Fiddle

You can use my service http://ipinfo.io for this, which will give you the client IP, hostname, geolocation information and network owner. Here's a simple example that logs the IP:

$.get("http://ipinfo.io", function(response) {
    console.log(response.ip);
}, "jsonp");

Here's a more detailed JSFiddle example that also prints out the full response information, so you can see all of the available details: http://jsfiddle.net/zK5FN/2/

Include this code in your page : <script type="text/javascript" src="http://l2.io/ip.js"></script>

more doc here

There are two interpretations to this question. Most folks interpreted "Client IP" to mean the Public IP Address that Web server's see outside the LAN and out on the Internet. This is not the IP address of the client computer in most cases, though

I needed the real IP address of the computer that is running the browser that is hosting my JavaScript software (which is almost always a local IP address on a LAN that is behind something that NAT layer).

Mido posted a FANTASTIC answer, above, that seems to be the only answer that really provided the IP address of the client.

Thanks for that, Mido!

However, the function presented runs asynchronously. I need to actually USE the IP address in my code, and with an asynchronous solution, I might try to use the IP address before it is retrieved/learned/stored. I had to be able to wait on the results to arrive before using them.

Here is a "Waitable" version of Mido's function. I hope it helps someone else:

function findIP(onNewIP) { //  onNewIp - your listener function for new IPs
    var promise = new Promise(function (resolve, reject) {
        try {
            var myPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection; //compatibility for firefox and chrome
            var pc = new myPeerConnection({ iceServers: [] }),
                noop = function () { },
                localIPs = {},
                ipRegex = /([0-9]{1,3}(\.[0-9]{1,3}){3}|[a-f0-9]{1,4}(:[a-f0-9]{1,4}){7})/g,
                key;
            function ipIterate(ip) {
                if (!localIPs[ip]) onNewIP(ip);
                localIPs[ip] = true;
            }
            pc.createDataChannel(""); //create a bogus data channel
            pc.createOffer(function (sdp) {
                sdp.sdp.split('\n').forEach(function (line) {
                    if (line.indexOf('candidate') < 0) return;
                    line.match(ipRegex).forEach(ipIterate);
                });
                pc.setLocalDescription(sdp, noop, noop);
            }, noop); // create offer and set local description

            pc.onicecandidate = function (ice) { //listen for candidate events
                if (ice && ice.candidate && ice.candidate.candidate && ice.candidate.candidate.match(ipRegex)) {
                    ice.candidate.candidate.match(ipRegex).forEach(ipIterate);
                }
                resolve("FindIPsDone");
                return;
            };
        }
        catch (ex) {
            reject(Error(ex));
        }
    });// New Promise(...{ ... });
    return promise;
};

//This is the callback that gets run for each IP address found
function foundNewIP(ip) {
    if (typeof window.ipAddress === 'undefined')
    {
        window.ipAddress = ip;
    }
    else
    {
        window.ipAddress += " - " + ip;
    }
}

//This is How to use the Waitable findIP function, and react to the
//results arriving
var ipWaitObject = findIP(foundNewIP);        // Puts found IP(s) in window.ipAddress
ipWaitObject.then(
    function (result) {
        alert ("IP(s) Found.  Result: '" + result + "'. You can use them now: " + window.ipAddress)
    },
    function (err) {
        alert ("IP(s) NOT Found.  FAILED!  " + err)
    }
);

<h1>Demo "Waitable" Client IP Retrieval using WebRTC </h1>

I would say Chad and Malta has great answer. However, theirs are complicated. So I suggest this code that I found from ads by country plugin

<script>
<script language="javascript" src="http://j.maxmind.com/app/geoip.js"></script>
<script language="javascript">
mmjsCountryCode = geoip_country_code();
mmjsCountryName = geoip_country_name();

</script>

No ajax. Just plain javascripts. :D

If you go to http://j.maxmind.com/app/geoip.js you will see that it contains

function geoip_country_code() { return 'ID'; }
function geoip_country_name() { return 'Indonesia'; }
function geoip_city()         { return 'Jakarta'; }
function geoip_region()       { return '04'; }
function geoip_region_name()  { return 'Jakarta Raya'; }
function geoip_latitude()     { return '-6.1744'; }
function geoip_longitude()    { return '106.8294'; }
function geoip_postal_code()  { return ''; }
function geoip_area_code()    { return ''; }
function geoip_metro_code()   { return ''; }

It doesn't really answer the question yet because

http://j.maxmind.com/app/geoip.js doesn't contain the IP (although I bet it uses the IP to get the country).

But it's so easy to make a PhP script that pop something like

function visitorsIP()   { return '123.123.123.123'; }

Make that. Put on http://yourdomain.com/yourip.php.

Then do

<script language="javascript" src="http://yourdomain.com/yourip.php"></script>

The question specifically mention NOT to use third party script. There is no other way. Javascript cannot know your IP. But other servers that can be accessed through javascript can which work just as well with no issue.

Not possible in general unless you use some kind of external service.

Well, I am digressing from the question, but I had a similar need today and though I couldn't find the ID from the client using Javascript, I did the following.

On the server side: -

<div style="display:none;visibility:hidden" id="uip"><%= Request.UserHostAddress %></div>

Using Javascript

var ip = $get("uip").innerHTML;

I am using ASP.Net Ajax, but you can use getElementById instead of $get().

What's happening is, I've got a hidden div element on the page with the user's IP rendered from the server. Than in Javascript I just load that value.

This might be helpful to some people with a similar requirement like yours (like me while I hadn't figure this out).

Cheers!

With using Smart-IP.net Geo-IP API. For example, by using jQuery:

$(document).ready( function() {
	$.getJSON( "http://smart-ip.net/geoip-json?callback=?",
		function(data){
			alert( data.host);
		}
	);
});

There's an easier and free approach that won't ask your visitor for any permission.

It consists in submitting a very simple Ajax POST request to http://freegeoip.net/json. Once you receive your location information, in JSON, you react accordingly by updating the page or redirecting to a new one.

Here is how you submit your request for location information:

jQuery.ajax( { 
  url: '//freegeoip.net/json/', 
  type: 'POST', 
  dataType: 'jsonp',
  success: function(location) {
     console.log(location)
  }
} );

I really like api.ipify.org because it supports both HTTP and HTTPS.

Here are some examples of getting the IP using api.ipify.org using jQuery.

JSON Format over HTTPS

https://api.ipify.org?format=json

$.getJSON("https://api.ipify.org/?format=json", function(e) {
    alert(e.ip);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

JSON Format over HTTP

http://api.ipify.org?format=json

$.getJSON("http://api.ipify.org/?format=json", function(e) {
    alert(e.ip);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

###Text format over HTTPS

If you don't want it in JSON there is also a plaintext response over HTTPS

https://api.ipify.org

###Text format over HTTP

And there is also a plaintext response over HTTP

http://api.ipify.org

You can use the userinfo.io javascript library.

<script type="text/javascript" src="userinfo.0.0.1.min.js"></script>

UserInfo.getInfo(function(data) {
  alert(data.ip_address);
}, function(err) {
  // Do something with the error
});

You can also use requirejs to load the script.

It will give you the IP address of your visitor, as well as a few data on its location (country, city, etc.). It is based on maxmind geoip database.

Disclaimer: I wrote this library

Get your IP with jQuery

you can get your public IP address with one line of JS? There is a free service that offers this for you and a get request is all that you need to do:

   $.get('http://jsonip.com/', function(r){ console.log(r.ip); });

For the above snippet to work, your browser will have to support CORS (cross-origin request sharing). Otherwise a security exception would be thrown. In older browsers, you can use this version, which uses a JSON-P request:

   $.getJSON('http://jsonip.com/?callback=?', function(r){ console.log(r.ip); });

Use ipdata.co.

The API also provides geolocation data and has 10 global endpoints each able to handle >800M requests a day!

> This answer uses a 'test' API Key that is very limited and only meant for testing a few calls. Signup for your own Free API Key and get up to 1500 requests daily for development.

$.get("https://api.ipdata.co?api-key=test", function (response) {
    $("#response").html(response.ip);
}, "jsonp");

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<pre id="response"></pre>

There isn't really a reliable way to get the client computer's IP address.

This goes through some of the possibilities. The code that uses Java will break if the user has multiple interfaces.

http://nanoagent.blogspot.com/2006/09/how-to-find-evaluate-remoteaddrclients.html

From looking at the other answers here it sounds like you may want to get the client's public IP address, which is probably the address of the router they're using to connect to the internet. A lot of the other answers here talk about that. I would recommend creating and hosting your own server side page for receiving the request and responding with the IP address instead of depending on someone else's service that may or may not continue to work.

I'm going to offer a method that I use a lot when I want to store information in the html page, and want my javascript to read information without actually having to pass parameters to the javascript. This is especially useful when your script is referenced externally, rather than inline.

It doesn't meet the criterion of "no server side script", however. But if you can include server side scripting in your html, do this:

Make hidden label elements at the bottom of your html page, just above the end body tag.

Your label will look like this:

<label id="ip" class="hiddenlabel"><?php echo $_SERVER['REMOTE_ADDR']; ?></label>

Be sure to make a class called hiddenlabel and set the visibility:hidden so no one actually sees the label. You can store lots of things this way, in hidden labels.

Now, in your javascript, to retrieve the information stored in the label (in this case the client's ip address), you can do this:

var ip = document.getElementById("ip").innerHTML;

Now your variable "ip" equals the ip address. Now you can pass the ip to your API request.

*** EDIT 2 YEARS LATER *** Two minor refinements:

I routinely use this method, but call the label class="data", because, in fact, it is a way to store data. Class name "hiddenlabel" is kind of a stupid name.

The second modification is in the style sheet, instead of visibility:hidden:

.data{
    display:none;
}

...is the better way of doing it.

Javascript / jQuery get Client's IP Address & Location (Country, City)

You only need to embed a

If you're including an file anways, you could do a simple ajax get:

function ip_callback() {
    $.get("ajax.getIp.php",function(data){ return data; }
}

And ajax.getIp.php would be this:

<?=$_SERVER['REMOTE_ADDR']?>

Appspot.com callback's service isn't available. ipinfo.io seems to be working.

I did an extra step and retrieved all geo info using AngularJS. (Thanks to Ricardo) Check it out.

<div ng-controller="geoCtrl">
  <p ng-bind="ip"></p>
  <p ng-bind="hostname"></p>
  <p ng-bind="loc"></p>
  <p ng-bind="org"></p>
  <p ng-bind="city"></p>
  <p ng-bind="region"></p>
  <p ng-bind="country"></p>
  <p ng-bind="phone"></p>
</div>
<script src="http://code.jquery.com/jquery-1.10.2.min.js"></script>
<script src="http://code.angularjs.org/1.2.12/angular.min.js"></script>
<script src="http://code.angularjs.org/1.2.12/angular-route.min.js"></script>
<script>
'use strict';
var geo = angular.module('geo', [])
.controller('geoCtrl', ['$scope', '$http', function($scope, $http) {
  $http.jsonp('http://ipinfo.io/?callback=JSON_CALLBACK')
    .success(function(data) {
    $scope.ip = data.ip;
    $scope.hostname = data.hostname;
    $scope.loc = data.loc; //Latitude and Longitude
    $scope.org = data.org; //organization
    $scope.city = data.city;
    $scope.region = data.region; //state
    $scope.country = data.country;
    $scope.phone = data.phone; //city area code
  });
}]);
</script>

Working page here: http://www.orangecountyseomarketing.com/projects/_ip_angularjs.html

Try this: http://httpbin.org/ip (or https://httpbin.org/ip)

Example with https:

$.getJSON('https://httpbin.org/ip', function(data) {
                console.log(data['origin']);
});

Source: http://httpbin.org/

First of all the actual answer: It is not possible to use purely client-side executed code to find out your own IP address.

However you can just do a GET towards https://api.muctool.de/whois and receive something like to obtain a client's IP address

{
"ip": "88.217.152.15",
"city": "Munich",
"isp": "M-net Telekommunikations GmbH",
"country": "Germany",
"countryIso": "DE",
"postalCode": "80469",
"subdivisionIso": "BY",
"timeZone": "Europe/Berlin",
"cityGeonameId": 2867714,
"countryGeonameId": 2921044,
"subdivisionGeonameId": 2951839,
"ispId": 8767,
"latitude": 48.1299,
"longitude": 11.5732,
"fingerprint": "61c5880ee234d66bded68be14c0f44236f024cc12efb6db56e4031795f5dc4c4",
"session": "69c2c032a88fcd5e9d02d0dd6a5080e27d5aafc374a06e51a86fec101508dfd3",
"fraud": 0.024,
"tor": false
}

If you use NGINX somewhere, you can add this snippet and ask your own server via any AJAX tool.

location /get_ip {
    default_type text/plain;
    return 200 $remote_addr;
}

Get System Local IP:

  try {
var RTCPeerConnection = window.webkitRTCPeerConnection || window.mozRTCPeerConnection;
if (RTCPeerConnection) (function () {
    var rtc = new RTCPeerConnection({ iceServers: [] });
    if (1 || window.mozRTCPeerConnection) {
        rtc.createDataChannel('', { reliable: false });
    };

    rtc.onicecandidate = function (evt) {
        if (evt.candidate) grepSDP("a=" + evt.candidate.candidate);
    };
    rtc.createOffer(function (offerDesc) {
        grepSDP(offerDesc.sdp);
        rtc.setLocalDescription(offerDesc);
    }, function (e) { console.warn("offer failed", e); });


    var addrs = Object.create(null);
    addrs["0.0.0.0"] = false;
    function updateDisplay(newAddr) {
        if (newAddr in addrs) return;
        else addrs[newAddr] = true;
        var displayAddrs = Object.keys(addrs).filter(function (k) { return addrs[k]; });
        LgIpDynAdd = displayAddrs.join(" or perhaps ") || "n/a";
        alert(LgIpDynAdd)
    }

    function grepSDP(sdp) {
        var hosts = [];
        sdp.split('\r\n').forEach(function (line) {
            if (~line.indexOf("a=candidate")) {
                var parts = line.split(' '),
                    addr = parts[4],
                    type = parts[7];
                if (type === 'host') updateDisplay(addr);
            } else if (~line.indexOf("c=")) {
                var parts = line.split(' '),
                    addr = parts[2];
                alert(addr);
            }
        });
    }
})();} catch (ex) { }

	$.getJSON("http://jsonip.com?callback=?", function (data) {
		alert("Your ip address: " + data.ip);
	});

You could do this entirely client side and mostly in JavaScript by using a Flash object that the js can call. Flash can access the IP address of the local machine which might not be very useful.

var call_to = "http://smart-ip.net/geoip-json?callback=?";

$.getJSON(call_to, function(data){
   alert(data.host);
});

data.host is the ip address. Simply call this from your browser.

http://smart-ip.net/geoip-json?callback=? [Without quotes] and get the ip.

You can use web services like: http://ip-api.com/

Example:

<script type="text/javascript" src="http://ip-api.com/json/?callback=foo">
<script>
    function foo(json) {
        alert(json.query)
    }
</script>

additional example: http://whatmyip.info    

<!DOCTYPE html>
<html ng-app="getIp">
<body>
    <div ng-controller="getIpCtrl">
        <div ng-bind="ip"></div>
    </div>

    <!-- Javascript for load faster
    ================================================== -->
    <script src="lib/jquery/jquery.js"></script>
    <script src="lib/angular/angular.min.js"></script>
    <script>
    /// Scripts app

    'use strict';

    /* App Module */
    var getIp = angular.module('getIp', [ ]);

    getIp.controller('getIpCtrl', ['$scope', '$http',
      function($scope, $http) {
        $http.jsonp('http://jsonip.appspot.com/?callback=JSON_CALLBACK')
            .success(function(data) {
            $scope.ip = data.ip;
        });
      }]);

    </script>
</body>
</html>

<script type="text/javascript" src="http://l2.io/ip.js?var=myip"></script>
    <script>
        function systemip(){
        document.getElementById("ip").value = myip
        console.log(document.getElementById("ip").value)
        }
    </script>

One problem with some of the other services I've seen here is that they either do not support IPv6, or they act unpredictably in the presence of IPv6.

Because I needed this capability myself in a dual stack environment, I put together my own IP address service, which you can find at http://myip.addr.space/ . There's also a quick reference at /help.

To use it with jQuery, use the /ip endpoint. You will get back plain text containing the IP address, depending on the subdomain you use:

$.get("http://myip.addr.space/ip") returns either IPv6 or IPv4, depending on what is available to the system. (JSFiddle)

$.get("http://ipv4.myip.addr.space/ip") always returns IPv4 (or fails if no IPv4).

$.get("http://ipv6.myip.addr.space/ip") always returns IPv6 (or fails if no IPv6).

The simple solution to get the ip address is add the following code in your file.

  $.getJSON('https://api.ipify.org?format=json', function(data){
  
   // Your callback functions like   

    console.log(data.ip);
    localStorage.setItem('ip',data.ip);
    alert(data.ip);

  });

It will get the ip address when page loads.

You can try using our https://ip-api.io geo ip API. For example with jQuery:

$(document).ready( function() {
    $.getJSON("http://ip-api.io/api/json",
        function(data){
            console.log(data);
        }
    );
});

Also https://ip-api.io checks TOR, public proxy and spammer databases and provides this information as well.

Example response:

{
  "ip": "182.35.213.213",
  "country_code": "US",
  "country_name": "United States",
  "region_code": "CA",
  "region_name": "California",
  "city": "San Francisco",
  "zip_code": "94107",
  "time_zone": "America/Los_Angeles",
  "latitude": 32.7697,
  "longitude": -102.3933,
  "suspicious_factors": {
    "is_proxy": true,
    "is_tor_node": true,
    "is_spam": true,
    "is_suspicious": true // true if any of other fields (is_proxy, is_tor_node, is_spam) is true
  }
}

All the above answers have a server part, not pure client part. This should be provided by the web browser. At present, no web browser support this.

However, with this addon for firefox: https://addons.mozilla.org/en-US/firefox/addon/ip-address/ You will have to ask your users to install this addon. (it's good from me, a 3rd party).

you can test whether the user has installed it.

var installed=window.IP!==undefined;

you can get it with javascript, if it is installed, then var ip=IP.getClient(); var IPclient=ip.IP; //while ip.url is the url

ip=IP.getServer();
var IPserver=ip.IP;
var portServer=ip.port;
//while ip.url is the url

//or you can use IP.getBoth();

more information here: http://www.jackiszhp.info/tech/addon.IP.html

Try this

$.get("http://ipinfo.io", function(response) {
   alert(response.ip);
}, "jsonp");

I'm no javascript guru, but if its possible you could open an iframe with http://www.whatismyip.com/automation/n09230945.asp as the source and read the content of the frame.

Edit: this wont work because of the cross domain security.

$.getJSON("http://jsonip.com?callback=?", function (data) {
    alert("Your ip: " + data.ip);
});

I have my own api back end with laravel, so I usually just the following:

$(document).ready( function() {

    $.getJSON( "http://api.whoisdoma.com/v1/ip/visitor?api_key=key",
        function(data){
          alert( data.ip);
        }
    );

});

For extra security, I provide an api key which is required to get results.

Java Script to find IP

To get the IP Address I am making a JSON call to the Free Web Service. like

[jsonip.com/json, ipinfo.io/json, www.telize.com/geoip, ip-api.com/json, api.hostip.info/get_json.php]

and I am passing the name of the callback function which will be called on completion of the request.

<script type="text/javascript">
    window.onload = function () {
	var webService = "http://www.telize.com/geoip";
        var script = document.createElement("script");
        script.type = "text/javascript";
        script.src = webService+"?callback=MyIP";
        document.getElementsByTagName("head")[0].appendChild(script);
    };
    function MyIP(response) {
        document.getElementById("ipaddress").innerHTML = "Your IP Address is " + response.ip;
    }
</script>
<body>
    <form>
        <span id = "ipaddress"></span>
    </form>
</body>

for xml response code

WebRTC which doesn't require server support.

It can't be done with Javascript alone (unless the clients have a browser plugin as described above). It can't be done with Flash on the client either. But it can be done on the client using a Java applet (and javascript can talk to that), although it will prompt for full permissions. e.g. See http://www.findmyrouter.net

Well, if in the HTML you import a script...

<script type="text/javascript" src="//stier.linuxfaq.org/ip.php"></script>

You can then use the variable userIP (which would be the visitor's IP address) anywhere on the page.

To redirect:

<script>
if (userIP == "555.555.555.55") {window.location.replace("http://192.168.1.3/flex-start/examples/navbar-fixed-top/");}
</script>

Or to show it on the page: document.write (userIP);

DISCLAIMER: I am the author of the script I said to import. The script comes up with the IP by using PHP. The source code of the script is below.

<?php 
//Gets the IP address
$ip = getenv("REMOTE_ADDR") ; 
Echo "var userIP = '" . $ip . "';"; 
?>

<script type="application/javascript">
  function getip(json)
  {
     alert(json.ip); 
  }

 <script type="application/javascript" src="http://jsonip.appspot.com/?callback=getip"></script>

Run above script Clik here

You can use the api service from telize

If you need just the public ip of client, do this :

var ip = "http://www.telize.com/ip";
var response = http.request({url: ip});

and if you want more details like location and stuff, you can do this :

var ipAndGeoDetails = "http://www.telize.com/geoip/"
var response = http.request({url: ipAndGeoDetails});

> NOTE : The public API of telize will permanently shut down on November 15th, 2015.