Aside from using the region to infer which carrier the user is under.
views:
427answers:
3
A:
Would it be possible to inspect the IP address to determine carrier?
Optimal Solutions
2009-02-04 00:30:16
A:
hi - you can use this product by my company to get the country & operator of mobile handsets: http://werwar.com , i'll set you up with a free trial but you send a post to our server from your app and it returns a string with the carrier (of known) and country.
massive mobile
2009-12-12 00:58:53