This guide shows you how to view a list of all the listening TCP ports on a Windows machine. This is useful for knowing if a service is listening on a specific port, or if you need to know if a specific port is available to use for something like a web server.
View all listening TCP ports on Windows:
Open the command prompt.
Run the following command:
netstat -an | find "LISTENING" | more
Example output:
TCP 0.0.0.0:80 0.0.0.0:0 LISTENING TCP 0.0.0.0:135 0.0.0.0:0 LISTENING TCP 0.0.0.0:443 0.0.0.0:0 LISTENING TCP 0.0.0.0:445 0.0.0.0:0 LISTENING