This is a collection agency. The name of the entity is A.C.S.
The number IDs as a cel phone but when dialed forwards to an inbound center. The trap is obvious- The number appears to be a legit caller, even after Googling, ie; it shows as a cel phone in the San Antonio area, but when dialed it forwards, probably carrying your caller ID info with it, and an operator announces the company name.
TaDa! Gotcha, A.C.S., Have a great 2011!
Love, A.B.S., former Credit Card Holder, U.S.A.A., San Antonio, Republic of Texas, baby!!!!