If you need to get a hold of someone but you don't have their cell phone number, you may think that you hit the end of the road and that there is no way for you to find someones cell phone number. While it is true that it is more difficult to locate a cell phone number, it's not impossible. Sure, cell phone numbers aren't listed in the phone book, but there are ways for you to get access to a persons cell phone number. You just have to go about finding a persons cell phone number a little bit differently.