How does a reverse white pages lookup work? You may be dealing with a caller that could endanger you or your family, so a situation like this is when it would nice to have a free directory where you could easily trace where the call is coming from.
The directories that promise you they are offering owner details for free are very likely making a misleading claim. The phone company can help, but they can take a lot of time in doing so. If you would like to use the reverse address feature, you are required to enter the street address, as well as the city or zip code/postal code.
If it is that annoying neighbor or enemy, you'll know their identity and their tactics, and will be able to call them out on it. It is also completely legal and fully confidential. You might discover that the reverse lookup service also finds results for unlisted, unpublished or cellular numbers.
So, do yourself a favour and appreciate that there's no such thing as a free reverse cell phone look up. So, get out there and find it.