What is my IP address?
Your public IP address appears as soon as the page loads. It is the address your internet provider or mobile carrier shows to every website you visit. It can be IPv4 (four numbers) or IPv6 (hexadecimal groups). Our server reads it to show it back to you and does not keep it.
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🔒 Everything runs in your browser. Your data and files never leave your device.
What an IP address is for
An IP address is the number that lets devices exchange data across the internet, like a mailing address for packets of information. When you open a website, it needs to know where to send the page back: it uses your public IP address, assigned by your internet provider or mobile carrier.
It works differently depending on the connection. At home, every device shares the same public IP (your router's), while each one has its own private IP on the local network. On a cell network, hundreds of customers can share one public IP through carrier-grade NAT (CGNAT).
IPv4, IPv6 and private addresses
| Type | Example | Note |
|---|---|---|
| IPv4 | 203.0.113.45 | 32 bits, about 4.3 billion possible addresses |
| IPv6 | 2001:db8:85a3::8a2e:370:7334 | 128 bits, far more than will ever be needed |
| Private IPv4 | 192.168.1.20, 10.0.0.5, 172.16.0.8 | Only visible inside your local network |
| CGNAT | 100.64.0.0 to 100.127.255.255 | Shared among a carrier's customers |
If the tool shows an IPv6 address, your connection supports IPv6. That is increasingly common on home fiber and cable and on 4G and 5G networks.
What an IP address does and doesn't reveal
- What it shows: your internet provider and a rough geographic area, usually the city or region of your carrier's network, sometimes dozens of miles from where you actually are.
- What it doesn't show: your name, your exact street address or what you do online. Only your provider can match an IP to a customer, and typically only in response to a legal order.
This tool does not look up your location. It only displays the address our server sees, along with details your browser sends to every site anyway. To change the address websites see, use a VPN, or restart your router if your provider assigns dynamic IPs.
3 real-life examples
Check that your VPN works
Note your IP before turning the VPN on, say 98.76.x.x. Turn it on and reload the page: if the address is different, the VPN is hiding your original IP.
Allow your address in a firewall
To allow your address on a firewall or an admin service, copy your public IP with the Copy button. If your provider assigns a dynamic IP, it may change after the router restarts.
Understand a 100.64.x.x address
Your router shows a WAN address starting with 100.64 while this tool shows a different one: your carrier uses CGNAT. You share a public address with other customers, which makes hosting a server at home harder.