IP Checker

See your public IP, or look up any IPv4/IPv6 address — nothing leaves your browser except the address itself.

My IP

Your address isn't detected until you press Detect my IP (that sends a request to ipify and ipwho.is).

Detecting your IP calls ipify and ipwho.is (or ipapi.co if that fails) directly from your browser — only your address is sent, no account, no other data.

IP Lookup

Looking up a public address sends only that address to ipwho.is (or ipapi.co if that fails). Private and other special-use addresses are recognised offline.

IP Details

Detect your IP or look one up to see its details here.

What your browser reveals

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Any site can read these from your browser without asking anything over the network. Nothing here is sent anywhere.

WebRTC leak test

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WebRTC (video calls, this site's peer-to-peer tools) can reveal addresses a VPN hides. The local test contacts nothing. Ticking the STUN option asks Google's STUN servers, the ones this site's Chess, Sea Battle and File Transfer already use, what public address they see, which is the real leak check.

The local test sends nothing. With the STUN option on, a STUN binding request goes to stun.l.google.com, which learns your public address and nothing else.

Other forms of an address

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Subnet calculator

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Network

192.168.1.0/24

Broadcast

192.168.1.255

First usable host

192.168.1.1

Last usable host

192.168.1.254

Usable hosts

254

Netmask

255.255.255.0

Wildcard 0.0.0.255

Check many addresses

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Classified offline, nothing is sent.

  • 100% Free
  • No Sign-Up
  • No Credit Card
  • No Free Trial
  • No Pro Tier
  • No Watermarks

Nothing is uploaded. Just open it and start.

Check your IP address and look up any other

Free, no sign-up, no credit card, no trial. See your public IPv4/IPv6 address, ISP, ASN, and approximate location, or analyze any other address; check what your browser reveals and whether WebRTC leaks past your VPN; do subnet maths offline — nothing is ever uploaded or stored.

Your IP, instantly

See your public IPv4 and IPv6 address, which one your browser prefers, ISP and ASN — on load, or only when you ask.

Look up any address

Enter any IPv4 or IPv6 address to see its ISP, ASN, and approximate location.

Public, private, or reserved

Classifies private, loopback, documentation and other special-use ranges offline, singly or by the thousand, plus subnet maths and address forms.

Private by design

No account, no server of ours — just the address sent to the lookup services. A browser panel and WebRTC test show what sites can see anyway.

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Frequently asked questions

How does this tool find my IP address?
Your browser calls free, key-less lookup services directly, with no server in between: ipify for your IPv4 and IPv6 addresses, and ipwho.is for ISP, ASN and approximate location, with ipapi.co as a backup when ipwho.is is blocked or over its allowance. Only your address is sent; nothing is uploaded or stored, and answers are kept in this tab for ten minutes so a refresh doesn't ask again. You can turn off detection on page load and press the button yourself instead.
How accurate is the location shown?
IP-based geolocation is approximate — typically accurate to a city or region, sometimes only a country, and it can be outdated or simply wrong (especially on mobile networks, VPNs, and corporate connections). It's never your exact physical address, and this tool never claims otherwise.
Can I look up any IP address, not just my own?
Yes — enter any IPv4 or IPv6 address in the IP Lookup section, or open a link like /ip-checker?ip=8.8.8.8. Private, loopback, link-local, carrier-grade NAT, documentation, benchmarking and other special-use addresses (192.168.x.x, 127.0.0.1, 192.0.2.x, and IPv4-mapped IPv6 however it's written) are recognised instantly without a network call, since they have no public geolocation data. Paste a whole list into "Check many addresses" to classify them all offline and download the result as CSV or JSON.
What does "Network domain" mean, and is it a reverse DNS lookup?
It's the ISP or organization's registered domain (e.g. "comcast.net"), not a true reverse-DNS (PTR) hostname for that exact address — browsers can't perform a real PTR lookup. When ipwho.is has no domain on record, it shows as not available rather than a guess.
Why don't I see an IPv6 address?
Not every connection has IPv6 — if your network or ISP doesn't support it, only your IPv4 address will show. This is normal and doesn't affect the accuracy of your IPv4 details. When you have both, the page says which one your browser prefers, and you can see the details of either.
What do the browser panel and the WebRTC test show?
The browser panel lists what any website can read without a single network request: browser and system, screen size, languages, time zone, cookie and Do Not Track settings. If your browser's time zone doesn't match where your IP is, it says a VPN or proxy may be in use. The WebRTC test asks your browser for the addresses it would offer in a video call; the local test contacts nothing, and the optional STUN check (which contacts Google's STUN servers, the same ones this site's peer-to-peer tools use) shows whether WebRTC reveals your real address past a VPN.
Can it do subnet maths and address conversions?
Yes, all offline: the subnet calculator takes a block like 10.0.0.0/8 or 2001:db8::/48 and gives the network, broadcast or last address, usable host range and count, netmask and wildcard, and tells you whether another address is inside it. The address forms section shows an IPv6 address expanded and compressed (RFC 5952), the IPv4-mapped form, the integer, hex and binary values, and the reverse-DNS name.
Is anything uploaded or stored on a server?
No. This tool runs entirely in your browser and has no backend of its own — it only calls the named third-party services above to resolve IP data (and Google's STUN servers only if you tick that option in the WebRTC test), and nothing you look up is saved anywhere but this tab's short cache.

Spotted a bug or have a suggestion?

Found something broken, have an idea, or just want to say thanks about any of our tools? Every message reaches a real person.