Check Port on Windows with portquery

:heavy_exclamation_mark: This post is older than a year. Consider some information might not be accurate anymore. :heavy_exclamation_mark:

Portqry.exe is a command-line utility that you can use to help troubleshoot TCP/IP connectivity issues. Portq

If you are stuck on windows, and you have no telnet, port query has a GUI which helps to check if a port on a dedicated host is running.