Open source mobile phone detection.
http://detectmobilebrowsers.com/
JavaScript Libraries and Functions · Compatibility
Get access to data on 52,873 websites that are Detect Mobile Browsers Customers. We know of 21,740 live websites using Detect Mobile Browsers and an additional 31,133 sites that used Detect Mobile Browsers historically and 11,405 websites in the United States.
Get a list of 52,873 websites using Detect Mobile Browsers which includes location information, hosting data, contact details, 21,740 currently live websites and 31,133 sites that used this technology previously and 11,405 websites in the United States currently using Detect Mobile Browsers.