Cute Web Phone Number Extractor - It extracts valid phone, fax number, and mobile numbers from a search engine, websites and files.
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
CallerSmart - CallerSmart is an application that is basically used for the purpose of looking up mystery phone numbers for free.
NumValidate - Phone number validation REST API. Simple, Free, and Open Source.
ThisNumber - ThisNumber helps you find phone numbers for people and businesses!
Call Notes Pro - Call Notes Pro helps you to identify who is calling you. You won’t have to ask yourself “who is it?