Before we begin, let me tell you about the information you can find if you know a person’s number. They include: his name, address, map, you will know if the number is land line, cell phone or a toll-free number, household names and much more! Now you know how powerful this is. Let’s begin with the first step to find a person by their phone. reverse cell phone lookups WhitePages.com has a great free reverse phone directory located on whitepages.com/reverse-lookup. There you can search for someone by their number no matter if it’s a cell phone or land line. By general search engines I mean use Google, Yahoo and Live.com. Enter the number there but using different variations.