List of Free Functional Public STUN servers 2021

List of Free Functional Public STUN servers 2021

STUN (Session Traversal Utilities for NAT) is the protocol used to discover your public address and determine any restrictions in your router that would prevent any direct connection with a peer. A request from the client is sent to the STUN server on the internet and then it will reply with the client's address and whether or not the client is accessible behind the router's NAT.

I wrote how to implement your own STUN server using Coturn recently, however as someone that started as well with the WebRTC technologies without a lot of resources, we need to work with stuff that is free and sometimes, works way better than the stuff that we could implement by ourselves. Knowing that I decided to collect a list of free public STUN servers that work and can be used in your new projects without paying a single dime.

List of free functional public STUN servers

The following list of STUN addresses are public, so you can use them in your WebRTC based projects:

// Last Test: 01-Jul-2021 12:15 PM
let servers = [
    "iphone-stun.strato-iphone.de:3478",
    "numb.viagenie.ca:3478",
    "stun.12connect.com:3478",
    "stun.12voip.com:3478",
    "stun.1und1.de:3478",
    "stun.3cx.com:3478",
    "stun.acrobits.cz:3478",
    "stun.actionvoip.com:3478",
    "stun.advfn.com:3478",
    "stun.altar.com.pl:3478",
    "stun.antisip.com:3478",
    "stun.avigora.fr:3478",
    "stun.bluesip.net:3478",
    "stun.cablenet-as.net:3478",
    "stun.callromania.ro:3478",
    "stun.callwithus.com:3478",
    "stun.cheapvoip.com:3478",
    "stun.cloopen.com:3478",
    "stun.commpeak.com:3478",
    "stun.cope.es:3478",
    "stun.counterpath.com:3478",
    "stun.counterpath.net:3478",
    "stun.dcalling.de:3478",
    "stun.demos.ru:3478",
    "stun.dus.net:3478",
    "stun.easycall.pl:3478",
    "stun.easyvoip.com:3478",
    "stun.ekiga.net:3478",
    "stun.epygi.com:3478",
    "stun.etoilediese.fr:3478",
    "stun.faktortel.com.au:3478",
    "stun.freecall.com:3478",
    "stun.freeswitch.org:3478",
    "stun.freevoipdeal.com:3478",
    "stun.gmx.de:3478",
    "stun.gmx.net:3478",
    "stun.halonet.pl:3478",
    "stun.hoiio.com:3478",
    "stun.hosteurope.de:3478",
    "stun.infra.net:3478",
    "stun.internetcalls.com:3478",
    "stun.intervoip.com:3478",
    "stun.ipfire.org:3478",
    "stun.ippi.fr:3478",
    "stun.ipshka.com:3478",
    "stun.it1.hr:3478",
    "stun.ivao.aero:3478",
    "stun.jumblo.com:3478",
    "stun.justvoip.com:3478",
    "stun.l.google.com:19302",
    "stun.linphone.org:3478",
    "stun.liveo.fr:3478",
    "stun.lowratevoip.com:3478",
    "stun.lundimatin.fr:3478",
    "stun.mit.de:3478",
    "stun.miwifi.com:3478",
    "stun.modulus.gr:3478",
    "stun.myvoiptraffic.com:3478",
    "stun.netappel.com:3478",
    "stun.netgsm.com.tr:3478",
    "stun.nfon.net:3478",
    "stun.nonoh.net:3478",
    "stun.nottingham.ac.uk:3478",
    "stun.ooma.com:3478",
    "stun.ozekiphone.com:3478",
    "stun.pjsip.org:3478",
    "stun.poivy.com:3478",
    "stun.powervoip.com:3478",
    "stun.ppdi.com:3478",
    "stun.qq.com:3478",
    "stun.rackco.com:3478",
    "stun.rockenstein.de:3478",
    "stun.rolmail.net:3478",
    "stun.rynga.com:3478",
    "stun.schlund.de:3478",
    "stun.sigmavoip.com:3478",
    "stun.sip.us:3478",
    "stun.sipdiscount.com:3478",
    "stun.sipgate.net:10000",
    "stun.sipgate.net:3478",
    "stun.siplogin.de:3478",
    "stun.sipnet.net:3478",
    "stun.sipnet.ru:3478",
    "stun.sippeer.dk:3478",
    "stun.siptraffic.com:3478",
    "stun.sma.de:3478",
    "stun.smartvoip.com:3478",
    "stun.smsdiscount.com:3478",
    "stun.solcon.nl:3478",
    "stun.solnet.ch:3478",
    "stun.sonetel.com:3478",
    "stun.sonetel.net:3478",
    "stun.sovtest.ru:3478",
    "stun.srce.hr:3478",
    "stun.stunprotocol.org:3478",
    "stun.t-online.de:3478",
    "stun.tel.lu:3478",
    "stun.telbo.com:3478",
    "stun.tng.de:3478",
    "stun.twt.it:3478",
    "stun.uls.co.za:3478",
    "stun.unseen.is:3478",
    "stun.usfamily.net:3478",
    "stun.viva.gr:3478",
    "stun.vivox.com:3478",
    "stun.vo.lu:3478",
    "stun.voicetrading.com:3478",
    "stun.voip.aebc.com:3478",
    "stun.voip.blackberry.com:3478",
    "stun.voip.eutelia.it:3478",
    "stun.voipblast.com:3478",
    "stun.voipbuster.com:3478",
    "stun.voipbusterpro.com:3478",
    "stun.voipcheap.co.uk:3478",
    "stun.voipcheap.com:3478",
    "stun.voipgain.com:3478",
    "stun.voipgate.com:3478",
    "stun.voipinfocenter.com:3478",
    "stun.voipplanet.nl:3478",
    "stun.voippro.com:3478",
    "stun.voipraider.com:3478",
    "stun.voipstunt.com:3478",
    "stun.voipwise.com:3478",
    "stun.voipzoom.com:3478",
    "stun.voys.nl:3478",
    "stun.voztele.com:3478",
    "stun.webcalldirect.com:3478",
    "stun.wifirst.net:3478",
    "stun.xtratelecom.es:3478",
    "stun.zadarma.com:3478",
    "stun1.faktortel.com.au:3478",
    "stun1.l.google.com:19302",
    "stun2.l.google.com:19302",
    "stun3.l.google.com:19302",
    "stun4.l.google.com:19302",
    "stun.nextcloud.com:443",
    "relay.webwormhole.io:3478"
];

Eager to know how we checked that the mentioned addresses are functional? Keep reading!

How to check if a STUN server address is working

I try to keep all of the articles in Our Code World updated, however, I work on the blog and other stuff, so I may be not available 24/7 to updated everything that is outdated. Till the date, the given list works pretty well, but, in case that you are reading this a couple of months or years after the publication and the last update date is way too old, you may want to test if the servers are working properly by yourself and decide which one to use. This list has been verified using the following script that I wrote to verify whether a STUN address like the items in the list is reachable or not:

Note: if myIpAddress is an empty string, the address was probably reachable but the STUN server functionality failed.

/**
 * Helper method to check if a STUN address is reachable.
 * 
 * @param address The Domain and port of the STUN server.
 * @param _timeout The connection timeout (Limit when the connection takes too long). By default is 6 seconds.
 * @returns 
 */
 function isStunAddressUp(address, _timeout){
    _timeout = _timeout || 6000;
    let response = {
        myIpAddress: "",
        stun: address,
        ipv6Supported: true,
        errors: []
    };

    let checker = new Promise((resolve, reject) => {
        const pc = new RTCPeerConnection({
            iceServers: [
                {urls: `stun:${address}?transport=udp`}
            ]
        });
        
        pc.onicecandidate = (e) => {
            if (!e.candidate) return;

            // If a srflx candidate was found, notify that the STUN server works and provide the IP
            if(e.candidate.type == "srflx"){
                response.myIpAddress = e.candidate.address;
                pc.close();
            }
        };
        
        // Log errors:
        // Remember that in most of the cases, even if its working, you will find a STUN host lookup received error
        // Chrome tried to look up the IPv6 DNS record for server and got an error in that process. However, it may still be accessible through the IPv4 address
        pc.onicecandidateerror = (e) => {
            if(e.address == "[0:0:0:x:x:x:x:x]"){
                response.ipv6Supported = false;
            }
            
            response.errors.push(e);
        };
        
        pc.onclose = function () {
            console.log("datachannel close");
        };
        
        var dc = pc.createDataChannel('ourcodeworld-rocks');
        pc.createOffer().then(offer => pc.setLocalDescription(offer));

        dc.onclose = function (e) {
            resolve(response);
        };
    });

    let timeout = new Promise(function(resolve, reject){
        setTimeout(function() {
            reject(response);
        }, _timeout);
    });

    return Promise.race([checker, timeout]);
}

It's really simple and it works great, you just need to provide as first argument the domain or IP address of the STUN server along with the port and as second parameter the time limit for the request to succeed (timeout). Normally a successful request won't take not even a second, so if you need to increase the time for the request to succeed, there's something wrong with the server or your connection:

isStunAddressUp("stun.ipfire.org:3478", 5000).then(function(result){
    console.log(result);
    // `result` Should contain an object like this:
    //{
    //    "myIpAddress": "[::ffff:xxx.xxx.xx.xx]",
    //    "stun": "stun.ipfire.org:3478",
    //    "ipv6Supported": true,
    //    "errors": []
    //}
}).catch(function(err){
    // Something went wrong
    console.log(err);
});

As you can see, the method returns your IP address, resolved with the STUN server and checks if it supports IPV6 or not.

List with verification of support for IPV6

In order to know which of the STUN addresses provide support for IPV6, we wrote the following script that prints a JSON object with the information that we need:

let serversToTest = [
    // ...
    "numb.viagenie.ca:3478",
    // ...
];

async function TestServers(servers){
    let results = {
        servers: [],
        details: []
    };

    for(let i = 0; i < servers.length;i++){
        let server = servers[i];

        console.log(`== Testing: ${server}:`);

        try{
            let result = await isStunAddressUp(server, 5000);
            console.log('%c Server functional! ', 'background: #222; color: #02ff00');

            if(result.myIpAddress){
                results.servers.push(server);
                results.details.push({
                    STUNAddress: server,
                    ipv6Supported: result.ipv6Supported,
                    lastTest: new Date().toDateString()
                });
            }
        }catch(e){
            if(e == "timeout"){
                console.log('%c STUN Server connection timeout! ', 'background: #222; color: #ff0000');
                return;
            }

            console.log('%c STUN Server unreachable! ', 'background: #222; color: #ff0000');
        }

        console.log(`======================`);
    }

    console.log(JSON.stringify(results, null, 4));
}

TestServers(serversToTest);

And the output was the following one with the list of functional servers:

[
        {
            "STUNAddress": "iphone-stun.strato-iphone.de:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "numb.viagenie.ca:3478",
            "ipv6Supported": true,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.12connect.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.12voip.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.1und1.de:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.3cx.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.acrobits.cz:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.actionvoip.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.advfn.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.altar.com.pl:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.antisip.com:3478",
            "ipv6Supported": true,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.avigora.fr:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.bluesip.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.cablenet-as.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.callromania.ro:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.callwithus.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.cheapvoip.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.cloopen.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.commpeak.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.cope.es:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.counterpath.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.counterpath.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.dcalling.de:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.demos.ru:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.dus.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.easycall.pl:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.easyvoip.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.ekiga.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.epygi.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.etoilediese.fr:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.faktortel.com.au:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.freecall.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.freeswitch.org:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.freevoipdeal.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.gmx.de:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.gmx.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.halonet.pl:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.hoiio.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.hosteurope.de:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.infra.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.internetcalls.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.intervoip.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.ipfire.org:3478",
            "ipv6Supported": true,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.ippi.fr:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.ipshka.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.it1.hr:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.ivao.aero:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.jumblo.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.justvoip.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.l.google.com:19302",
            "ipv6Supported": true,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.linphone.org:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.liveo.fr:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.lowratevoip.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.lundimatin.fr:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.mit.de:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.miwifi.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.modulus.gr:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.myvoiptraffic.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.netappel.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.netgsm.com.tr:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.nfon.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.nonoh.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.nottingham.ac.uk:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.ooma.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.ozekiphone.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.pjsip.org:3478",
            "ipv6Supported": true,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.poivy.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.powervoip.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.ppdi.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.qq.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.rackco.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.rockenstein.de:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.rolmail.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.rynga.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.schlund.de:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.sigmavoip.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.sip.us:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.sipdiscount.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.sipgate.net:10000",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.sipgate.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.siplogin.de:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.sipnet.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.sipnet.ru:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.sippeer.dk:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.siptraffic.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.sma.de:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.smartvoip.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.smsdiscount.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.solcon.nl:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.solnet.ch:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.sonetel.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.sonetel.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.sovtest.ru:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.srce.hr:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.stunprotocol.org:3478",
            "ipv6Supported": true,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.t-online.de:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.tel.lu:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.telbo.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.tng.de:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.twt.it:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.uls.co.za:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.unseen.is:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.usfamily.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.viva.gr:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.vivox.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.vo.lu:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voicetrading.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voip.aebc.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voip.blackberry.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voip.eutelia.it:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipblast.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipbuster.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipbusterpro.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipcheap.co.uk:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipcheap.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipgain.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipgate.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipinfocenter.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipplanet.nl:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voippro.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipraider.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipstunt.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipwise.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voipzoom.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voys.nl:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.voztele.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.webcalldirect.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.wifirst.net:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.xtratelecom.es:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun.zadarma.com:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun1.faktortel.com.au:3478",
            "ipv6Supported": false,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun1.l.google.com:19302",
            "ipv6Supported": true,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun2.l.google.com:19302",
            "ipv6Supported": true,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun3.l.google.com:19302",
            "ipv6Supported": true,
            "lastTest": "Thu Jul 01 2021"
        },
        {
            "STUNAddress": "stun4.l.google.com:19302",
            "ipv6Supported": true,
            "lastTest": "Thu Jul 01 2021"
        }
]

If you know another public STUN server address, please share it with the community in the comment box so we can update the list.

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