ReportedCalls is hosting complaints about phone calls and text messages received by the United States Federal Commissions. ReportedCalls helps people search and identify potential spam and scam phone numbers.
800 Notes - A place to complain anonymously about a Phone calls received from Bad Company. Consumer Protection.
Truecaller - Find a person by a name or phone number worldwide for free using Truecaller.
Reverse Lookup - This iOS App helps users identify the caller based on the phone number. If any user receives a phone call from an unknown number, they can use this App to look up information on that caller.
FastPeopleSearch - Research people reverse lookup various pieces of information similar.
Spokeo - Spokeo bills itself as the white pages of the internet and provides a platform for anyone to look up publicly available data from online and offline sources. Read more about Spokeo.
CallApp - Free Caller ID & Call Blocker app that allows mobile users to block phone calls, identify calls, blacklist unwanted callers and much more.