NETWORK & WHOIS ·
tcp:TCP Port Check
Check whether a TCP port is open (host:port).
About the TCP Port Check tool
Check whether a TCP port is open (host:port).
Tip: from any lookup box on the site you can type tcp:example.com to run this tool directly.
Results are generated live. Each finding is graded as an error, warning or pass and explained so that you know what to fix and why it matters.