I have to tell you something is def. wrong with this number.  My caller ID says Bellsouth.  Yes I know AT&T owns them, several searches on this number are coming up bad.  One search says AT&T in South Carolina and another says Jacksonville, FL.  When I called 611 in (305), they transferred me somewhere.  Then the lady said they had to call me back, which she did.  

Some research says landline, some research says nothing at all.  Believe me when I tell you, I sincerely doubt this is any of the above.  I am on hold with them, no one answered this line, not to mention Bellsouth or AT&T.   There is just please wait for the next agent with music only.  AT&T does not have this on their wait/hold. Also, no prompts for departments period.  Gut says fake, either it is fake, a separate department such as warrant eavesdropping, etc.  Weird stuff has been happening to phone and computer.

Jen Georgia is absolutely correct! I had a call back from AT&T today and this is the number that came up on my caller ID.

Its bellsouth / at & t. Thats the phone number they "return" calls from. Tech support or trouble calls. If you didnt have a tech problem with the phone or dsl, someone may have gave them the wrong number by accident or they dialed it wrong by accident.

Bellsouth / AT & T
904-357-2380

Called cell phone; left no message. I reverse-looked it up and it came up "Landline, unavailable"