You just run the
ping command from the cli with whatever the IP is that you want to test (the one above is just an example).
ping just throws a few bytes at the IP and lets you know when it gets some back. It’s a good, simple way to know if your computer can see anything at a particular IP.
Sounds like it might be a hosts issue. Have you checked your hosts file? On Windows 10 it should be in
c:\windows\system32\drivers\etc\hosts. You’ll need to open it w/ a text editor w/ elevated permissions or you won’t be able to make changes.
This explains a little bit about what the hosts file does: https://helpdeskgeek.com/windows-7/windows-7-hosts-file/ The short version is that it tells your computer what domain is associated with what IP.