This is a scam trying to get people's credit card info.
Just got a call from this number saying they were from "my" credit card company (didnt mention the bank by name or ask for me by name), offering to lower my interest rate.
I asked which credit card company they were calling from, he named about 5 national banks and claimed they represented all of them. Neither of my credit cards were from any of those he listed, which I told him.
He then claimed they represented other banks too and asked what company I had. I didn't tell him but asked again where he was calling from. He again said they represent lots of banks and said he was calling about a card with a $3,000 balance and over 10% interest. Again, this matched neither of my cards.
I told him it sounded like a scam which obviously annoyed him. He became irritated and started protesting but I told him again it was an obvious scam and he wouldn't get my credit card info and hung up.