WebRTCOK
Local IP address is not exposed via WebRTC — the browser masks it.
WebRTC powers calls and data transfer right in the browser, but while setting up a connection it can reveal your local, and sometimes real, address past the tunnel.
Is my VPN working right now
In a couple of seconds, check whether your traffic really goes through the VPN and whether your real address is leaking. We look at your public IP address, network type, WebRTC, IPv6 and time zone — and explain in plain language what each signal means.
The check runs right in your browser. We do not log or store your IP address — location is resolved from a database on our server.
Checking your connection…
Your connection
- Public IP address
- Unavailable
- Network type
- Home provider
Leak signals
IPv6OK
The connection uses IPv4 — your real IPv6 address is not exposed.
Many VPNs tunnel only IPv4. If your provider gives you IPv6, that traffic can bypass the VPN and reveal your real address.
Time zone vs IP countryInfo
Could not match the time zone to the IP country.
When you turn on a VPN in another country, your device time zone usually stays your real one while the IP country changes. A mismatch is an indirect sign of a VPN (but not a fact: travelers and manual clock settings can trigger it).
DNS queriesInfo
A browser cannot reliably tell which DNS resolver handles your queries — that needs a dedicated DNS test. In the LiMP app, DNS queries go inside the encrypted tunnel, so your provider cannot see which sites you open.
A DNS leak is when site names resolve through your provider's DNS around the VPN. The provider then sees the list of domains, even if the traffic itself is encrypted.
With LiMP VPN there are no leaks
The LiMP app routes all traffic — including IPv6 and DNS — through an encrypted tunnel, replaces your real IP address with a secure server address, and closes the usual leak channels.
The check runs on your device plus one request to our server for geolocation. We do not log, store or share your IP address with third parties.
IP Geolocation by DB-IP
What we check
Several independent signals — together they give an honest answer to whether the VPN works and whether your real address is leaking.
Public IP and network type
Your address (IPv4 or IPv6), country and provider by IP, and whether the address belongs to a data center — a typical VPN sign.
WebRTC and IPv6 leaks
We check whether the browser exposes a local address via WebRTC and whether traffic runs over IPv6 past the tunnel.
Time zone vs IP country
We compare your device time zone with the country of your IP address — a mismatch often means an active VPN.
When it helps
Confirm the VPN works
Turned on the VPN? Check that the IP, country and network type really changed instead of staying your own.
Find a leak
VPN on, but something reveals your real address? The check shows whether WebRTC or IPv6 leaks around the tunnel.
Before an important session
Before a stream, call or handling sensitive data, make sure your real city and provider are not visible from outside.
Ready to try?
Download LiMP VPN for free and feel the difference within a minute.
How to tell whether a VPN really works
An active VPN icon in the app does not guarantee that all traffic goes through the tunnel. The most reliable signal is your public IP address: when the VPN works, it changes to the VPN server address, usually from a data center and often in another country. If your IP address, city and provider stay your real ones after connecting, the tunnel did not come up and traffic goes directly.
What a leak is and where it comes from
Even with a working VPN, individual channels can reveal your real address around the tunnel. This most often happens for three reasons.
- WebRTC: the in-browser calling technology can expose a local, and sometimes real, IP address.
- IPv6: many VPNs tunnel only IPv4, and IPv6 traffic slips past the tunnel.
- DNS: site names can resolve through the provider's DNS, so it sees the list of domains you open.
What a WebRTC leak is
WebRTC is a browser-built technology for calls and data transfer. While setting up a connection it can collect your network addresses, including local ones, and hand them to a site around the VPN. Our check shows whether such addresses are visible. Modern browsers often mask the local address (mDNS), and then the result honestly shows “not exposed”.
Why the time zone gives away a VPN
When you connect to a VPN server in another country, your public IP address changes country while your device time zone stays your real one. We compare the two: if they do not match, it is an indirect sign of a working VPN. This is a heuristic, not a fact — travelers or manual clock settings can trigger a false positive.
How LiMP VPN closes leaks
The LiMP app routes all traffic through an encrypted tunnel, including IPv6 and DNS queries, so your provider cannot see which sites you open and sites see the secure server address, not yours. Your real IP address, location and browsing history stay private on iPhone, Android and in the browser.