They use this number to confirm whether it's still in service. They already have your credit card information. Do not answer, check your credit card accounts and block this number.
Received the call on my cell phone (despite being on the No Call List, of course). Automated call from "credit services" stating they were calling about my credit card account and stating "there is no problem with your account at this time". I hung up after that and didn't get any more information.
I didn't answer and they didn't leave a message. Blocking (651) 649-1632 as other Google searches revealed it is a scammer.