I never answer unrecognized numbers,  and often call back of they don't leave a message as this caller failed to do. ( Always use*67  when you call or you just confirm that yours is a live number).  Disconnected -  probably those "Card Services" vermin.  Death to them all.

Called back but the number was disconnected. Trash callers for sure.

Automated voice claiming to be named "Amanda". They called to let me know my current credit card is doing fine. Which is odd because I've yet to register with any credit agency, not even for student loans. Scammers of some kind, I'm sure.

I would change cell numbers but have been looking for work and have been using my cell number as a call back number.  Now I wonder if that was such a good idea.  This call today at 8:49 AM Saturday (I didn't get to sleep until 0330 this AM.)  This was again from card services.  I have tried to play their game but since I don't have any credit cards (which they say they can reduce the rates I am (not) paying) I can't get them to stay on the line long enough foxtrotuniformcharliekilo with them.  I am sure they are using some VoIP.  They usually have non-existent caller id phone numbers.  This has become more than annoying.  What good does it do reporting to the "Do Not Call" FCC website.  I really don't see any enforcement action.  They are simply harvesting personal credit information, take a few bucks from the suckers and move on to dupe someone else.  Another problem is that some employers and even my VA doctor show up with a phone number but "Unknown Caller" just like the scammers.  I guess the best we can do is just vent.  Anyone have a better solution.  I saw on one post somewhere that there is a formula to create a phony credit card number that uses proper number combinations, which works until they ask for the little number on the back of the card.  I tell them that my little number has become worn and illegible.  This scam sure has been around a long time.

Racheal with Card Services