Today I came across a very useful Squidoo Lense: Reverse Phone Number Lookup.
On this lesne you will first get an introduction on what reverse phone number lookup exactly is and how it is performed. You are also told scenarios that make a reverse phone number lookup neccessary.

At reverse phone number lookup you will get detailed step by step insutrction son how to perform a reverse number lookup.

You will also find a list of the best reverse phone number lookup services online.

I really recommend this lense, it offers helpful and useful information.