Received a call, they hung up. The caller ID said F.A.S.T. The call was around 8:17 PM.

I get a call from this number randomly throughout the year.  Of three unknown numbers this is the main one that comes up.  Only once did I a voice come over the other line.  It was a male voice.  His tone was that of anger so he came off aggressive and rude.  Off the bat without any pleasantries or identifying of himself, he asked to speak to the head of the house.  I asked him to identify whom he wanted to speak to.  (His aggressive tone then escalated with what seemed like frustration)  He rudely and loudly asked for the head of household again, to which I asked for him to identify himself.  He refused, shouted out something and hung up.  

Besides the above time, any other time I may have picked up my phone has returned silence followed by a hang up on the other end.  

Calling back any of the numbers returns a fax machine or the line rings continuously with no answer.

Almost all the phone calls occurred in the early evening.

I did a look up for this phone number via a free online database that keeps track of telemarketers, survey companies, collection agencies, political organizations, charities, or any other company or organization engaging in unsolicited phone calls, as reported by our users. The result was:- Digital Design, Inc. (http://www.digital-design.com/pbxvoip.htm)

I get a call from this number randomly throughout the year.  Of three unknown numbers this is the main one that comes up.  Only once did a voice come over the other line.  It was a male voice.  His tone was that of anger so he came off aggressive and rude.  Off the bat without any pleasantries or identifying of himself, he asked to speak to the head of the house.  I asked him to identify whom he wanted to speak to.  (His aggressive tone then escalated with what seemed like frustration)  He rudely and loudly asked for the head of household again, to which I asked for him to identify himself.  He refused, shouted out something and hung up.  

Besides the above time, any other time I may have picked up my phone has returned silence followed by a hang up on the other end.  

Calling back any of the numbers returns a fax machine or the line rings continuously with no answer.

Almost all the phone calls occurred in the early evening.

I got a call from 904-483-3312 today.... Received calls from 483-3311 a week or so ago.... Caller ID shows F.A.S.T. Caller always hangs up or just dead air.... WHO IS THIS & HOW DO I STOP THE CALLS?

Same call @ 10:45 A.M. on 10/24/07.  Answered call, they hung up.

The call came in on 9-4-2007 at 8:48 pm. I answered the phone and no one would answer on the other end. The call showed on the caller id as F.A.S.T.

I got this call also.  Tedd Bear.  I was on the line and unable to answer.

Call came in but hung up.