Do you get calls from harassing telemarketers, prank callers or annoying callers? Callerbase.com offers a reverse phone lookup service so that you can get the name and address for any unknown phone number from their reverse lookup database. This service is free for listed numbers and land line numbers but if you want information for an unlisted number or a cell phone then you’ll need a pay a small fee for this service. Callerbase.com has a money back guarantee if they can’t find the name and address of the phone number you supply to them which ensures you’ll won’t be wasting your money. All their lookups are confidential which means no one will be notified if you search for their phone number. So if you get an unknown call and you like to find out who it is calling you, just go to callerbase.com.