IPGIPGrid-ai

Port Checker

Test whether a TCP port is open on a host.

Attempts a TCP connection to the given host and port with a short timeout. Useful for verifying that firewalls, services and NAT rules behave as expected on your own infrastructure.

Single host/port TCP connectivity test with strict rate limits. Only test systems you own or are authorized to test.

Privacy: Only connect to hosts you own or are authorized to test.

Related tools

VPN CheckDetect whether an IP address belongs to a VPN, proxy or hosting network.HTTP Header Security CheckFetch and review the security headers of any public website.

Frequently asked questions

Is this a full port scanner?

No. This tool checks one host/port pair at a time with strict rate limits, for diagnostics only.