Because you can’t always find them for free, cell phone numbers can be found at websites you pay for a membership to.

You might think it is illegal to obtain the information and that’s why it’s not just out there for you to gather. It’s not illegal to do a cell phone lookup. What would be illegal is for the mobile phone companies to give out your private information.

This is why the sites charge you money. They have paid for the information by purchasing lists from other companies who sell the information. They then paid a staff to put the information all into a database. This costs them money, so it costs you money.