DB-IP IP to ISP database can be used to get company/provider information for visitors. MaxMind also provides an ISP database.

To use them, simply select & purchase the database you want and upload it to the misc Matomo directory. (If you are using a GeoIP server module you may have to do more to get it to work w/ Matomo. The relevant instructions are here for Apache, and here for Nginx.)

You will also need to check the Provider plugin in Matomo is installed and activated.