Open source mobile phone detection.
http://detectmobilebrowsers.com/
JavaScript Libraries and Functions · Compatibility
Get access to data on 142,328 websites that are Detect Mobile Browsers Customers. We know of 57,837 live websites using Detect Mobile Browsers and an additional 84,491 sites that used Detect Mobile Browsers historically and 28,269 websites in the United States.
Get a list of 142,328 websites using Detect Mobile Browsers which includes location information, hosting data, contact details, 149,948 currently live websites which includes 92,111 domains that redirect to sites in the list. 84,491 sites that used this technology previously and 28,269 websites in the United States currently using Detect Mobile Browsers.