Numverify - Global phone number validation and lookup API
Number Checker. All World - Check the telephone number to identify the country, state, region, city, mobile operator.
Antideo - Email, IP address and phone number validation API service
Cute Web Phone Number Extractor - It extracts valid phone, fax number, and mobile numbers from a search engine, websites and files.
RealValidito - Phone Validator | Free Phone Number Validation & Phone Number Lookup Service | Realvalidito
ZabaSearch - Find people free with Zabasearch directory engine that includes free people search, reverse phone number lookup, address lookup, and more.