Who called from 3526883175

Several calls (daily) to my cell phone with dead air on the other end.  7/10-7/17/2009

Received 3 calls this week from this phone number, no messages were left. Received another call this morning at 9:15am from a lady saying that I won a free $1000 Internet shopping spree because I apparently entered for it somewhere. She verified my basic information such as address and then we were done. Five minutes later her "supervisor" calls back and asks for more personal information such as where I work and date of birth. I made up answers then said "this sounds like a scam" and he hung up right away.

I saw the number on caller id.I said hello and it sounded like someone hungup

I've gotten several calls from similar numbers:

(352) 688-3175
(352) 688-3417
(352) 688-3904

When I answer, there's 3 beeps and then the call disconnects. When I call back, the number rings forever and no one answers.

I started getting these calls daily too! from (352)688-9175 and (352) 688-3373.  352 is a florida area code.. my assumption is we got put on a list when signing up for something but it's odd that they don't leave messages and you can't make an outgoing call to them.

any progress with this?