Private or Public IP Address? Check Any IPv4 Address
Type an IPv4 address to see if it is private, public, loopback, link-local or carrier-grade NAT, and what that means.
Private addresses are reserved for home and office networks and are not reachable from the internet. Enter an address to see which kind it is.
Check an IP address
Reserved ranges
| Range | Kind | Example |
|---|---|---|
| 10.0.0.0 to 10.255.255.255 | Private (RFC 1918) | 10.0.0.1 |
| 172.16.0.0 to 172.31.255.255 | Private (RFC 1918) | 172.16.0.1 |
| 192.168.0.0 to 192.168.255.255 | Private (RFC 1918) | 192.168.1.1 |
| 127.0.0.0 to 127.255.255.255 | Loopback, this device | 127.0.0.1 |
| 169.254.0.0 to 169.254.255.255 | Link-local, no DHCP | 169.254.1.5 |
| 100.64.0.0 to 100.127.255.255 | Carrier-grade NAT | 100.64.0.1 |
Questions people ask about Private IP checker
- Can a private IP be reached from the internet?
- No, not without port forwarding or a tunnel.
- What does 169.254.x.x mean?
- Your device could not get an address from the router. Check the connection.
- Why does my ISP give me a 100.64 address?
- Carrier-grade NAT. Many users share one public address, so port forwarding may not work.
Free tools that help
- Subnet calculatorEnter an IPv4 address with a prefix or netmask to get the network, broadcast, host range, wildcard mask and usable hosts. Split into subnets.