Wow, here it is 7 months later and they have either started up again or are still at it. I never answer these calls and this one was on my cell phone, which was unusual. Very likely robo callers.
Phishing call. Hoping you'll actually call them back and volunteer a credit card number, expiration date, and CCV code as "verification" of your account to "prove that you own the card.". Notice when they robocall that they don't even say what bank/company they are calling from. That's because they have no clue what credit cards you carry.
This stuff could pretty effectively be shut down if the government would actually choose to ENFORCE some of the laws that are already on the books. Instead, they ignore it, and proceed to pass even more laws that they have no intent to enforce. Enforcement consisting of LONG prison sentences for those found to be doing these phishing scams would start to deter others. Seems like phone company records would show where these calls are really originating from. (And, yes, if it's overseas, there's less that can be done). There also has to be a technological solution that would prevent Caller ID phone number/location spoofing.
Note that there are at LEAST 3 crimes being committed with these calls. The first is calling people on the DNC list. The second is using a robodialer for the calls. The third is the actually ID theft scam.