Google Maps has a wide array of APIs that let you embed the functionality of Google Maps.
https://developers.google.com/maps/
Mapping
Get access to data on 18,081,960 websites that are Google Maps API Customers. We know of 3,775,060 live websites using Google Maps API and an additional 14,306,900 sites that used Google Maps API historically and 1,664,841 websites in the United States.
Google Maps API websites that are also using other technologies.
Get a list of 18,081,960 websites using Google Maps API which includes location information, hosting data, contact details, 3,775,060 currently live websites and an additional 3,739,796 domains that redirect to sites in this list. 14,306,900 sites that used this technology previouslyand 1,664,841 websites in the United States currently using Google Maps API.
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