Open Port Check
Test whether a TCP port is open and reachable on your IP or any host.
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Enter a host above and press Run to start the check.
About the Open Port Check
Check whether a specific TCP port is open and reachable from the public internet on your own IP address or any host. This is useful for confirming port forwarding, hosting a game or web server, or troubleshooting firewalls — the check runs from our server to the host and port you specify, so it tests inbound reachability.
How to use
- Your public IP is filled in automatically (or enter any host).
- Enter the TCP port number to test (e.g. 25565 for Minecraft, 80 for HTTP).
- Press Run to see whether the port is open from outside.
Frequently asked questions
- Why does my port show as closed?
- Common reasons: no service is listening on that port, a firewall is blocking it, port forwarding isn't configured on your router, or your ISP blocks the port.
- Can I check a port on my own connection?
- Yes — your public IP is pre-filled. Make sure a service is actually listening and your router forwards the port to your device, then test it here.