Who called from 7200000000

I think this is a way for anybody to block their callback number.  Just got one today from someone today who was legit, but perhaps paranoid.

Just got a call. The lady claimed to be from Arapahoe county sheriff's office. She had my full name right and was calling about some business I indeed have with them. So I think the call is legitimate.

called my Verizon Wireless cell 11/22/12 at 2 PM...when I answered they hung up...if this call is from Colorado as the above mentions it is strange as I live in New Hampshire and have never been to Colorado

I got the same call from the arapahoe county district office....?

i wish i could block unwanted BS calls