Numlooker - Numlooker is a web-based tool that is used to reverse the phone number that you have received.

ReportedCalls - ReportedCalls helps people search and identify potential spam and scam phone numbers.

Rap Sheet Reverse Caller ID - Rap Sheet Reverse Caller ID is an application that provides you the option to search the information about unknown numbers.

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.

FindPeopleFast - FindPeopleFast is an online people search platform that allows you to get the results of the people within a few minutes by providing the first and last name or phone number.

USCallers - USCallers.com is a free, reverse phone lookup service for both cell and landline phone numbers.