Finding someone’s cell phone number is no joke. The very purpose of a mobile number is to maintain privacy. But still, reverse cell phone lookup is possible. Sometimes, people do not mind giving their details on publicly visible websites, social media & online directories. Thereby, sites such as Google, Facebook, Ppl, Peekyou, SpyDialer, etc., which also have inbuilt search engine functionality, crawl and index all the information available in the public domain.