How to Test if Your Mobile Proxy Leaks Your Real IP (WebRTC, DNS, IPv6) in 2026

You bought a mobile proxy, you plugged it in, and your tool says it’s connected. So you assume you’re safe. Here’s the uncomfortable part: a request can route through your proxy and still hand the other side your real ip. It happens quietly, it happens to careful people, and most of them never find out until an account gets flagged.

I run a hardware proxy farm in Singapore. Real phones, real SIM cards from Singtel, M1, and StarHub. So I verify these exact connections every day, and I’ve watched every leak below slip past someone who swore their setup was clean. Here’s how to actually test for it, so you know your proxy is hiding you instead of just feeling like it is.

what a leak actually is

A leak is any path that lets the destination, or a service in the middle, learn something true about you that the proxy was supposed to hide. Usually that’s your real ip, but it can also be your real dns resolver, your real location, or your real timezone.

It’s possible because a proxy only carries the traffic you actually send through it. Your machine has other ways of talking to the network, and several of them don’t go through the proxy unless you force them to. Your browser, your operating system, and your tools all make side connections you never asked for. Those side connections are where you get caught.

check your exit ip first

This is the easy one. Turn the proxy on and visit a simple “what is my ip” page or an ip info service. You want two things to be true. First, the ip isn’t your home ip. Second, and people forget this part, the ip belongs to the mobile carrier you’re paying for, not a hosting company.

If the page shows Singtel, M1, or StarHub, good. If it shows a datacenter name, you’re not on a real mobile ip, and that’s a separate problem worth fixing before you go any further.

the dns leak that undoes everything

When your computer wants to reach a website, it first asks a dns resolver to turn the name into a number. If that question goes out on your real connection instead of through the proxy, you’ve just told your own isp every site you’re about to visit, and handed a strong location signal to anyone correlating it. Your traffic can be perfectly proxied and this lookup still walks out the front door.

To test it, keep the proxy on and load a dns leak checker. The resolvers it reports back should sit in Singapore, on the tunnel, consistent with your exit ip. If you see your home isp’s resolver, or a resolver in your real country, that’s a live dns leak.

The fix on the socks5 side is one letter. Use socks5h, with the h on the end, not plain socks5. That h tells your tool to resolve dns through the proxy instead of on your own machine. Without it, your computer does the lookup locally first and the proxy never sees it. If you take one thing from this, take the h.

the webrtc leak hiding in your browser

Webrtc is the technology browsers use for voice and video calls. To make those calls connect, it tries to discover your real network addresses using something called a stun request, which can reveal both your local ip and your real public ip directly, completely sidestepping your proxy. Your page traffic is proxied. Webrtc quietly waves your real address at the room.

Test it the same calm way. With the proxy active, open a webrtc leak page and look at the addresses it finds. If your real public ip shows up there, you have a webrtc leak even though everything else looks fine. The fix is to disable webrtc in the browser, or use an extension or an antidetect profile that blocks it, then reload the test and confirm your real ip is gone.

the ipv6 leak almost nobody checks

Most mobile proxies hand you an ipv4 address. But your own machine and network may also have ipv6, and a lot of tools quietly prefer ipv6 when it’s available. So your tool reaches for the ipv6 path, that path was never proxied, and it sails around your ipv4 only proxy carrying your real address.

To catch it, use a test page that reports both your ipv4 and your ipv6 result while the proxy is on. If the ipv6 line shows a real address tied to you, that’s your leak. The clean fix is usually to disable ipv6 on the connection you’re testing, so everything is forced down the proxied ipv4 path, unless your provider explicitly handles ipv6 for you.

the soft tell: timezone and locale

This one isn’t strictly a leak, but it gives you away just the same. Your exit ip says Singapore, but your browser still reports a timezone from your real country, or a system language that doesn’t fit. On its own it proves nothing. Stacked next to a perfect ip, it reads as someone pretending, and detection systems love that kind of contradiction. Set your timezone and locale to match the ip you’re presenting.

the repeatable test routine

Run this every time you start on a fresh proxy, before you trust it with anything:

• Turn the proxy on, check your exit ip, and confirm it’s the carrier, not a datacenter.
• Run a dns leak test and confirm the resolvers sit on the tunnel.
• Run a webrtc test and confirm your real ip doesn’t appear.
• Check both ipv4 and ipv6 and confirm nothing leaks on the ipv6 side.
• Glance at your timezone and locale and confirm they match the exit.

Five quick checks, a couple of minutes. Do it once per environment, and again any time you change tools or browsers, because a browser update or a new profile can quietly turn webrtc or ipv6 back on without telling you. The whole point is that you stop guessing.

where the setup helps

A lot of these leaks get harder to trip when you start from a real mobile ip with dns that actually routes through the tunnel, instead of a setup that proxies your page traffic but leaves your resolver exposed. That’s the part I built around: real Singapore mobile ips from actual Singtel, M1, and StarHub SIMs, sticky sessions so your ip holds steady, and dns that routes through the tunnel so you stop leaking your real resolver. You still run the five checks. You just pass more of them by default.

If you want to test your own setup against real Singapore carrier ips, you can start a trial and use code YT30 for thirty percent off your first month. Provision a port, then run the exact routine above against it. Thirty minutes tells you whether your foundation is real before you build anything on top of it.

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