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Port checker

Check whether a port on your IP address or a domain is open and reachable from the internet. Useful when setting up port forwarding, cameras, game servers or remote desktop.

Enter a domain or IP address, for example 216.73.217.13.
The port is a number from 1 to 65535.

Your public IP address is pre-filled. The test checks a TCP connection.

Common ports

How to read the result

Open port
A service is listening on the port and is reachable from the internet. Keep open only the ports you really need.
Closed port
A connection from the internet failed. A firewall blocks the port, the router does not forward it, or no service is running on it.
Forwarding does not work
If your router has a different public IP address than this page shows, you are behind your provider's shared address (CGNAT). Port forwarding then has to be arranged with your provider.

More network tools

  • Ping

    Checks whether a server responds and how many milliseconds it takes.

  • Traceroute

    Shows the path data takes to the target, hop by hop.

  • IP lookup

    Shows the country, city, provider and network of any IP address.