Similar to the white pages these offer information on cellular numbers which are not listed on the white pages (Whitepages only have land phones). In such technologically advance times, people require information on everyone and everything they come across for various reasons. These are online databases that contain mobile numbers from all 52 states and all wireless companies. There are many of them out there, new lookup cell phones however because there is no official national mobile phone directory, these reverse directories don’t share a single database. In other words, some are superior to others. The main difference is the database size - the good ones have over 200 million wireless numbers, which corresponds to about 90% of the mobile phone population in the USA.