I guess this is as good a place as any for this. I thought it might be helpful for some of you out there.
For the past week or so, I've been getting a weird Las Vegas phone number on my caller ID on my office phone. I don't answer any numbers I don't know, so I have been just letting it ring. The caller never leaves a message, so I decided to try to find out where it was from. Reverse lookup online didn't yield anything, but I came across this site.
It's basically a message board for numbers just like this one. If you get a call from an unknown number, and you can't find out where it's from, you can enter it in the search box at the top and see if anyone else had any calls from the same number.
Turns out the one I was getting was from Hilton Vacations. It also made me remember to put my office phone in the Do Not Call registry.