A convenient source for information on IP addresses is WhatIsMyIP.com. It will immediately tell you what your WAN (lWide Area Network a.k.a. the internet) IP address is, as opposed to the IP address seen by the computers on your LAN (Local Area Network. Then if you click on "IP Lookup" at the top of the window it will tell you who an IP address belongs to and in general where it is located.

There are Terminal commands for doing the same thing as well as a number of applications, and web sites, but I find this one easy to use and informative.

If we knew what it was we were doing, it wouldn't be called research, would it?

— Albert Einstein