I'm using the WhitePages API ( developer.whitepages.com ) to get a phone type (landline or cellular) and the phone's service provider (Verizon, T-Mobile, etc), but they only have a personal API which limits you to 2 calls a second and/or 1,500 calls a day. The paid version, or "Pro", is a minimum of $500 a month and/or $0.10 a call.
Does anyone know another service where I can get that information for free or cheaper than $500 / $0.10 a call? If not I'll have to try to cache everything and it'll technically be against their TOS...