Very cool list! Alot of these IPs on the surface look like Apple stores (For example, there is an Apple Store in Palm Desert, CA on El Paseo Drive). It would be interesting to know if there is more than just retail traffic going in and out of those IPs. Are there micro-infrastructure deployments there?
This is called a geofeed. Companies that own or operate IP addresses can customarily share the location of those IP addresses. This is less of "IP-based Geolocation" rather "Geolocation of IP addresses.