Who called from 6072035573

Received this call at 0946 Eastern on a Sunday (30-August-2015) with "AF.P.O." in the CID. As I associate those letters with "Air Force Post Office", and my Dad was with the USAF for over 30 years, I let it ring through. No message. The number is now blocked form leaving a message.

I received 2 phone from this number 16072035573 this morning. Don't know who or what this is.

A.F.P.O is a fraud calling my father who is 92.  for  money. rotten ###

Hi my name is Joe,it starts off. DNCL docent stop them

Comes up as A.F.P.O. left no message.