So, here's the thing. You can spoof caller ID. There are several ways to spoof it, but all of them depend on the cooperation, at some level, of the phone company.
The number (214) 279-0990 is being spoofed by a lot of people. It used to go to a fax machine; now it goes to some girl's voicemail. What they do is simple; they send out prerecorded calls that ask you to press 9 to connect to their operator. This way, you have no real contact info for them; you don't know their number, and you don't know the number you're being connected to.
This allows them to engage in various scams; it used to be "$99 vacations", now it's "we can lower your credit card rates".
I did a call trace, and may subpoena Qwest to try to get whatever information they have. It's unlikely that they'll cooperate willingly; I have been told by various scammers that they pay Qwest to give them special caller ID lies, like "out of area", even when they're calling from within state. I believe them, on that; there's no reason for Qwest not to sell this service.
Anyone who has more information is welcome to suggest things. A lot of people suggest complaining to the FCC and/or FTC. While that may help, it won't help much without an identification of who's really behind these numbers.
Good luck, and good hunting.