Who called from 3130000000

Phone#313-000-0000 called yesterday 9/28/12 and Today 9/29/12 #ON Caller ID/Leaving No Message.

yes its calling me as well 11 time today it does seem to piss you off but still if any thing dont pick it up since you know its going to be no answer i did the * 69 on it and i got the 313 000 0000 on the number the only thing i can see it being is a fax......

I have received at least 6 calls today from this number.  No one responds if I pick up.

This number  1-313-000-0000  I have not answered it because of the number and then looked it up....They have called me 5 times today on my cell phone,,,,, how can i block them?

12 calls just today....no answer when called back....empty line when picked up