If you want to know who is calling you, phone lookup and reverse phone number lookup services can tell you exactly who the phone number belongs to, even if it is a cell phone number. These services use public records and private databases to track down the owner of a phone number. However, you may not get the information you need, especially if the phone number has been disconnected. A professional service will use different sources and their years of experience to track down the information you need.
Fixed Line or Mobile