Once I thought my site got hacked as there was an unauthorised login, and in the logs it showed the IP Address.
I needed a service to find the addresses on a map for an IP address.
The API sends back a JSON file with various details for the IP Address such as:
You can check the details on the site itself, if not using the API as seen below for the IP for google.com:
This site and the API can be used freely by anyone.