Open source mobile phone detection.
http://detectmobilebrowsers.com/
JavaScript Libraries and Functions · Compatibility
Get access to data on 275,970 websites that are Detect Mobile Browsers Customers. We know of 134,122 live websites using Detect Mobile Browsers and an additional 141,848 sites that used Detect Mobile Browsers historically and 60,298 websites in the United States.
Get a list of 275,970 websites using Detect Mobile Browsers which includes location information, hosting data, contact details, 134,122 currently live websites and an additional 140,870 domains that redirect to sites in this list. 141,848 sites that used this technology previously and 60,298 websites in the United States currently using Detect Mobile Browsers.