Open source mobile phone detection.
http://detectmobilebrowsers.com/
JavaScript Libraries and Functions · Compatibility
Get access to data on 232,672 websites that are Detect Mobile Browsers Customers. We know of 68,679 live websites using Detect Mobile Browsers and an additional 163,993 sites that used Detect Mobile Browsers historically and 30,572 websites in the United States.
Get a list of 232,672 websites using Detect Mobile Browsers which includes location information, hosting data, contact details, 68,679 currently live websites and an additional 89,046 domains that redirect to sites in this list. 163,993 sites that used this technology previously and 30,572 websites in the United States currently using Detect Mobile Browsers.