Free tool

See your public IP and connection details

See the public address this site received, inspect sourced network and DNS facts, and calculate IPv4 or IPv6 subnets. Compare the address after connecting a VPN, or run the optional WebRTC check.

Before you sign in

Checking…

Use “Check again” after changing networks or connecting a VPN to compare what this site sees.

IP version
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Country
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Public name
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Forwarding header
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Browser header suggests
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System header suggests
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Language
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Secure page
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Time zone
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Screen
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This is the address this site saw for this visit, using IPv4 or IPv6. The other IP version is not tested. Country comes from Cloudflare when the visit passed through it. A reverse-DNS name is set by a network operator and does not prove VPN status, ownership, or safety. No account is required; standard server logs may include lookup requests.

Look up public DNS

Shows public IP addresses and optional reverse-DNS names. An IP lookup also contacts its regional registry for network registration. DNS and registration do not verify a company or website. For an email link, use Link Check. Private networks and port scans are not part of this tool.

DNS inspection sends the entered domain to Cloudflare 1.1.1.1. It shows cached recursive answers for A, AAAA, CNAME, MX, NS and TXT; it does not test your device's resolver.

IP address and subnet calculator

Exact calculations for IPv4 and IPv6, including private and special-purpose addresses. Calculations do not contact a third party.

Addresses an embedded widget can see

Run this optional test to see the addresses this browser offers to a WebRTC connection. A different public address deserves a closer look, but alone does not prove a VPN leak. A local name ending in .local hides a local address.

Running the test contacts the public STUN server stun.l.google.com, which learns your address for that check. DiamondGuards does not store the candidates.

What this site received

Language, browser, and these headers are sent with an ordinary page load. Cookies and sign-in headers are not shown back to the page.

What a normal website does not receive

Your DNS resolver list is not sent to the sites you open. A page that prints dozens of resolver addresses runs its own nameserver and records who asked for a throwaway name. This tool does not run that nameserver, so it will not invent a resolver list. If you are on a VPN and a resolver test shows your provider's DNS, name lookups are leaving the tunnel.

Torrent address detection needs a tracker and a magnet link. This tool does not log torrent clients.

What an IP check can tell you

The address above is the public IP this site received for this visit. An address you enter below is a separate lookup. Network registration describes an allocated range; an approximate IP location is not a device location or a person's address.

Can this confirm that a VPN is working?

Compare the public address before and after connecting your VPN with the address your VPN provider expects. A changed address is useful evidence, but this page cannot confirm every application or DNS route. The separate IPv4, IPv6, and DNS resolver checks appear only when their dedicated test infrastructure is available.

Checking an unfamiliar URL instead? Use Link Check, or read the small business security resources.

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