Am I behind CGNAT?
Compare the address your router got from your provider with the address websites see. If they differ, something between you and the internet is sharing or translating it.
If your router’s WAN address starts with 100.64 to 100.127, you are behind carrier-grade NAT. If it matches the address websites see, the public address is yours.
Where to find your router’s WAN address
- Open the router’s admin page or app (the address is on its label, often 192.168.0.1 or 192.168.1.1) and look for “Internet”, “WAN”, “Status” or “Connection”.
- Copy the IPv4 address shown there, not the LAN address that starts with 192.168 unless that is all it shows.
- Some provider apps show it under the gateway or device details instead.
Why it matters
With CGNAT, many customers share one public IPv4 address. Incoming connections (game hosting, cameras, remote desktop) can’t be port-forwarded to you over IPv4, and a block or a location placed on that shared address applies to everyone behind it. IPv6, when your provider offers it, gives each home its own addresses again.
We don’t list which providers use CGNAT unless the provider documents it; the comparison above works for any provider.