Port Check
TCP reachability probe
Check whether a public TCP port is open, closed, timed out, or unreachable from the server side.
How it works
Uses a server-side TCP socket because browsers cannot open raw TCP connections. Private, localhost, link-local, and internal metadata targets are blocked before connecting.
sorena.dev / tools / port-check
port-check—TCP reachability probe
enter a host + port above and press Run →