What's My IP: public IP address, ISP & location
Free What's My IP tool. Shows your public IPv4 and IPv6 addresses, ISP / ASN, city / country, timezone, and full browser fingerprint. IPs come from ipify, geo from ipapi — both free, widely-used and CORS-friendly.
If your VPN hides your real IP but the WebRTC reflexive IP matches your public HTTP IP, you have a WebRTC leak — sites can see your real address even when you're on a VPN.
When to look up your public IP address
Check your VPN
Verify that your VPN actually masks your real IP, and confirm the WebRTC leak test doesn't expose your home address through the browser.
Allow-list an IP
Get the exact IPv4 / IPv6 you need to paste into a firewall, an SSH config, a database access rule or a corporate VPN.
Support & troubleshooting
Hand the IP and ISP info to your support agent so they can correlate logs without you having to dig through router settings.
Geo-targeting QA
Confirm which country / city advertisers and CDNs see for you — handy for QA of localised pricing, GDPR banners and ad targeting.
Self-host & port-forward
Find your home IP for Plex, game servers, NAS access, IP cameras or any service you forward through your router.
Mobile carrier check
Mobile networks rotate IPs per cell tower. See which carrier and ASN you're on — useful when an app blocks "datacenter" ranges.
How to use this What's My IP tool
Open the page
Your public IPv4 and IPv6 addresses load automatically from ipify in under a second.
Read the ISP & geo card
The lookup shows your ISP / ASN, country, city, timezone and a quick "looks like a VPN / datacenter" badge based on the ASN owner.
Check the WebRTC leak test
If you're on a VPN and the reflexive IP matches your public IP, you have a leak — sites can see your real address through the browser even with the VPN on.
Compare browser vs IP timezone
A mismatch between your Intl timezone and the geo-IP timezone is a strong signal that a VPN or anti-detect browser is in use.
About your public IP, ISP and WebRTC leak test
An IP address is the unique number every device uses to talk to the internet. Your home router has a single public IP that every site you visit sees; the laptops and phones behind it share that one address through NAT. This tool answers the questions "what's my IP?", "what's my ISP?" and "is my VPN actually working?" in one screen, without any signup or tracking.
IPv4 vs IPv6
IPv4 addresses look like 203.0.113.42 and are running out — that's why ISPs share them via carrier-grade NAT. IPv6 looks like 2001:db8::1 and is the long-term replacement: every device gets a globally-unique address. Many residential ISPs now hand out both. If the IPv6 line shows "not available" your ISP or router is IPv4-only.
How the geo lookup works
We send your public IP to ipwho.is (free, CORS-friendly, no signup) which returns your ASN, ISP / organisation, city, country, timezone and currency. Geo-IP is an approximation: it's accurate to country level >99% of the time but city-level accuracy drops to ~60-80%, and can be off by hundreds of miles if you're behind a VPN, a mobile carrier or a cloud datacenter. We fall back to ipapi.co if ipwho.is is rate-limited.
The WebRTC leak test
Browsers can ask a STUN server "what IP do you see me from?" to set up peer-to-peer connections — that's how video calls work. The problem: this happens outside the SOCKS / HTTP proxy that some VPNs install. If you're on a VPN but the WebRTC reflexive IP matches your real public IP, every website you visit can fingerprint your real address even while you think you're hidden. A red leak detected badge means you need a VPN with WebRTC blocking, a browser flag (privacy.webrtc.legacyGlobalGetUserMedia.enabled in Firefox), or an extension like uBlock Origin set to block WebRTC.
Connection & environment
We expose the Network Information API (Chromium only): effective connection type (4g / 3g / slow-2g), measured downlink in Mbps, round-trip estimate, and the Data Saver flag. We also compare your browser's Intl timezone against the geo-IP timezone — a mismatch is one of the most reliable VPN signals.
Privacy
The page itself stores nothing. Your IP is sent to ipify, ipwho.is (or ipapi.co), and the STUN server you ask for the WebRTC reflexive IP. Each has its own privacy policy linked in the help text.
What's My IP — frequently asked questions
Your browser makes a single request to api.ipify.org (and api6.ipify.org for IPv6) which echoes back the source IP. Geo and ISP data come from ipapi.co.
The IP is exact. Geo-IP is an approximation — usually accurate to city level, but can be off by hundreds of miles if your ISP routes via a distant POP, or you're behind a VPN, mobile carrier or cloud provider.
This page itself stores nothing. The third-party IP-lookup services may log requests per their own privacy policies.
Most home and mobile ISPs use dynamic IPs that rotate. VPNs change your IP to the VPN server's. Mobile networks rotate per cell. Static IPs are mostly business-grade.