I get a robocall about once a week, despite our number being listed on the DNC list, from a "Carmen at Cardholder Services."
Since I now have Caller ID, I was able to look up the number -- it appears that it belongs to Carral, Inc, of Albany, Oregon.
I've reported it to the FTC. If you're being bothered, you could report it, too at complaints.donotcall.gov
United States