Are there any free cell phone # reverse look up sites?

Are there any cell phone reverse look up sites that are 1 FREE, and 2 that give the name of the person who the phone is accounted to? I know that the white pages has a site to do it, but they do not give names. I’m just curious because I think an ex’s new wife keeps leaving nasty messages on my phone. Thanks to everyone who can help me.

Here’s a site with a bunch of options:

investigate.net

I know it will give you the cel phone’s carrier and location. There are other links here that may lead you to what you’re looking for. Most of it is free.