This is a 3rd party telemarketing company trying to "qualify you" for lower credit card rates. It seems like it's proactive Debt Counseling or something of that nature. I actually answered and played along and the guy was rude and refused to divulge any company info so it was obviously a scam!
I've received four calls from them. The first time I asked them which credit card they were referring to as I was already locked in at the time at 0%. They hung up. So I was suspicious from that first call. So the next time they called I tried to ask for more information. They hung up. The third time I asked for the name of their company and they gave me some generic name like Credit Card Services (don't remember exactly). I asked for the name of her supervisor and she said she didn't know. I asked what kind of a sham company did she work for that she didn't know the name of her supervisor. She gave me a first name but said she didn't know his last name. As I continued to probe for info she ultimately hung up. Then I just received another call from them today (all in less than a year). I would like them to stop calling me or ANYONE. I'm really concerned that someone will actually fall for their scam (whatever it is). I'm also concerned at how frequently they call the same number. Beware!