Three quick checks show what websites can see: the network your IP comes from, your time zone, and whether your browser leaks another IP through WebRTC.
The IP address websites see
216.73.216.102
This is your IPv4 addressIPv6: checking…
Location websites see: Columbus, Ohio, United States.
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Network: looks like a regular internet provider
Your IP belongs to Anthropic, PBC (AS16509). If you meant to use a VPN, websites can probably see your real provider. Some VPNs use home addresses, so this is a hint, not proof.
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Time zone
Comparing your device's time zone with your IP's time zone…
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WebRTC leak test
Asking your browser which public IP it would share in a video call…
What these checks mean
Network
Every IP belongs to a network with an owner. Home and mobile internet come from providers like Comcast or Vodafone. VPN servers usually sit in data centers owned by hosting companies. We look at the owner's name to guess which one you have.
Time zone
Your browser knows your device's time zone, and your IP has a time zone too. If they differ, you might be using a VPN or proxy in another country, or you are simply traveling.
WebRTC
Your browser uses WebRTC for video calls in the browser. It asks a public server (called a STUN server; we use Cloudflare's) which IP it sees. If that answer differs from the IP above, a website could find an IP your VPN was meant to hide.
How to fix a leak
Turn on "leak protection" or a "kill switch" in your VPN app.
Make sure your VPN covers IPv6, or turn IPv6 off while using it. Check on our IPv6 page.
Use a browser setting or extension that limits WebRTC. In Firefox you can turn it off in about:config with media.peerconnection.enabled.
Questions people ask
How do I know if my VPN is working?
Open this page with the VPN off and note the IP and location. Turn the VPN on and reload. If the IP and the internet provider changed to the VPN's, and the checks show no leak, the VPN is working.
What is a WebRTC leak?
WebRTC is the browser feature behind video calls. To connect calls it can find your public IP, and with some VPN setups it finds your real one, which a website could then read. Most good VPN apps block this; a browser extension or setting can turn it off too.
Can a website tell for sure that I use a VPN?
Not for sure. It can see that your IP belongs to a hosting or VPN company, or that your clock and your IP's time zone don't match. Some VPNs use home internet addresses, and then even that is hard to spot.
Does this test check DNS leaks?
No. A DNS leak (your device asking your provider's servers for website names instead of the VPN's) needs a special DNS server to test. Many VPN providers offer a DNS leak test on their own site.