What Is My IP Address?

Your public IP address is how the rest of the internet reaches your connection. When you load a website, your ISP routes traffic to and from this address, which is why it can reveal your network operator, ASN, and an approximate location — but not your identity or exact home address.

Most connections today are "dual stack" and carry both an IPv4 and an IPv6 address. IPv4 is the older 32-bit format (for example 203.0.113.24) while IPv6 is the newer 128-bit format (for example 2001:db8:85a3::8a2e:370:7334 ). If only one is shown, your network has enabled just that protocol.

Use this page to confirm connectivity, verify a VPN is masking your real address, share your IP with a support agent, or check firewall and allow-list rules. For a deeper audit of any address, open the full IP Lookup tool.

Each card is filled by a small request to a hostname that only has an IPv4 (A) record or only an IPv6 (AAAA) record, so your browser has to use that protocol to answer. A card reads checking… while the request runs and not reachable when it fails. Typical combinations:

Dual-stack broadband

IPv4 203.0.113.24 and IPv6 2001:db8:4f2a:1c00:a1b2:c3d4:e5f6:7788 . Both protocols work, and websites may reach you over either one, so firewall and allow-list rules usually need both.

IPv4-only connection

IPv4 198.51.100.7, IPv6 not reachable. The network has not enabled IPv6. This is common and is not a fault by itself.

Mobile or carrier-grade NAT

IPv4 192.0.2.150, IPv6 2001:db8:a00:1::5 . On many mobile and some fixed-line networks the IPv4 address belongs to the carrier's NAT gateway and is shared with other subscribers, while the IPv6 address is assigned to your connection.

Connected through a VPN

Both cards should show addresses owned by the VPN provider, or IPv6 should be not reachable . If the IPv4 card shows the VPN but the IPv6 card still shows your ISP's address, IPv6 traffic is bypassing the tunnel.

The detail panel under the cards describes the one address your browser used to load this page — IPv4 or IPv6, whichever it picked. Use the Full IPv4 details or Full IPv6 details button to open either address in IP Lookup.

• Location, City, Region, Country, Continent, Timezone, Coordinates — looked up in the MaxMind GeoLite2 City database. Coordinates are the centre of an area, not the position of your device. Unknown with coordinates 0, 0 means the database has no location for the address.
• ASN, Organization, ISP — from the MaxMind GeoLite2 ASN database: the autonomous system that routes your address and its registered name. Open the number in ASN Lookup to see the rest of that network, or read what an ASN is.
• Reverse DNS — the PTR hostname published for your address, or No PTR record. ISP hostnames often encode the region or access technology.
• Network block — the GeoLite2 ASN block your address belongs to, such as a /22 of your ISP. It approximates the routed prefix and is hidden when the address is not in the database. The IP registration (RDAP) button opens the regional internet registry record for your address.

• Allow-listing. Copy the address into an SSH, database, cloud security group or admin-panel allow-list. On a dual-stack connection add both addresses, otherwise access fails whenever the client happens to use the other protocol.
• Checking a VPN or proxy. Load the page before and after connecting. Both addresses should change, and the Organization and ASN in the detail panel should switch from your ISP to the VPN provider.
• Support requests. Hosting providers and ISPs ask for your public IP to search their logs; the Raw response block copies all details as JSON.
• Port forwarding and self-hosting. Compare the WAN address in your router with the IPv4 card. If they differ, or the router shows an address in 100.64.0.0/10 , you are behind carrier-grade NAT and inbound IPv4 connections will not reach your router.
• Sites that fail on one protocol. If a site loads on one network but not another, note which protocols each connection has here, then compare with the site's A and AAAA records in DNS Lookup.

IPv6 shows not reachable, but my device has an IPv6 address

Addresses starting with fe80: (link-local) or fd (unique local) only work inside your network. A public IPv6 address normally starts with 2 or 3 . If you have one, check whether the router actually routes IPv6 to the internet, and whether a content blocker, DNS filter or corporate proxy blocks the IPv6-only test hostname.

A card stays on checking…

The test requests run in JavaScript. With scripts disabled, only the protocol that loaded the page is filled in from the server; the other card cannot be tested.

My IPv6 address changes every day

Most operating systems use temporary IPv6 privacy addresses (RFC 8981) and rotate the last 64 bits regularly. The first 64 bits, your network prefix, usually stay the same unless the ISP reassigns it. For allow-lists, use the prefix only if your provider assigns it statically.

The location is in the wrong city or country

Geolocation databases map address ranges to where the operator registers or uses them. Mobile carriers, VPNs and corporate networks often route traffic through gateways far from the user. MaxMind, which publishes GeoLite2, accepts correction requests for its data.

• It shows only your public egress address. Your device's LAN address, such as 192.168.1.20, is never visible to websites; find it in your operating system's network settings.
• Behind carrier-grade NAT, the IPv4 address shown is shared with other customers, so it does not identify your connection on its own.
• It does not classify your address as VPN, proxy, datacenter or mobile; the organization name is the only hint about the kind of network you are on.
• It does not run a speed test, port scan, DNS-leak or WebRTC-leak test, and it does not check blacklists or IP reputation.