IP

CGNAT Check

Best-effort CGNAT checks

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Disclaimer

This site is for general informational use and should not be treated as definitive ISP policy or formal network engineering advice.

Best-effort results only

The checker uses browser-visible information and a manual WAN IP entry. That can highlight strong signs of CGNAT or a NAT mismatch, but it cannot conclusively prove every network topology, firewall policy, or ISP implementation.

ISP guidance is intentionally cautious

ISP pages on this site are written carefully and should not be interpreted as definitive claims about every customer, region, or plan. Network behavior can vary and should be verified directly with the ISP.

No substitute for direct verification

If inbound connectivity matters for your work or business, confirm the details with your ISP, router vendor, and service documentation before making purchase or hosting decisions.