CIDR Calc

NAT Detector

Compare public, WAN, and LAN IPs to identify double NAT and common connectivity breakpoints.

Back to tools CIDR Calc

Public IP (what the world sees)WAN IP (router interface)LAN IP (device)

Analysis

NAT interpretation

Public IP

203.0.113.10

Public

WAN IP

198.51.100.22

Public

LAN IP

192.168.1.100

Public

Outcome

LAN is public (unusual)
WAN is public
Public IP is public