Got 2 calls from this number, did not answer.  Tried returning the call but got the "this is not a working number" message.

Just got a call from this number (obviously a 'spoofed' robocall) from Blythe, CA with a recorded message from 'Lisa' about 'your credit card account'.  I can't count how many similar scam calls that I've received about this general type of scheme (I also can't count how many of these numbers that I've blocked!).
This is another is a long list of predatory robocalls trolling phone numbers.  There are two neon signs that this is a scammer:  1)  They don't identify either themselves, you, or what credit account they are referring to, 2) More importantly, if you call the number back, there is no connection (a hallmark feature of these computer-generated 'spoofed' numbers).  I wouldn't waste my time logging this type of call online except that if this helps even ONE person avoid being sucked in by these predators, it would be worth it!