This is the callback number for wheresmycellphone.com
If you got a call, either you asked for it, or someone else did on your behalf by entering the number into their website.. I've used it on a number of occassions, and as far as I can tell, they don't sell your number to anyone. At least, I haven't seen an increase in marketing calls as a result..
The only real marketing call problem I've had is from the Home Security Group, an ongoing issue for a couple of years. However, I found out that all you have to do to get them off your back is transfer to talk to someone, and when they ask you a few questions, say you don't own a home, you live in an apartment. :) haven't heard from them in months now.
See I got a call from this num and I answered and it was this girl saying that she was calling to thank me for using her phone sex service which I would NEVER EVER EVER use and when I tried to tell her that I didn't call her or her service and she started to make all kinds of noises and make these panting sounds really loud so ya I have NO CLUE why I got that call