I didn't answer; they didn't leave a message.

Scammers hardly ever leave messages! Never answer a phone number you don't recognize! They'll haunt you forever or give telemarketers your info, if you answer! Use your caller ID or get a call blocker. My brother robo-calls me all the time. I told him to leave a message or I won't call him back!

Credit card member services. This is another scammer.

Calls & hangs up.
Caller id: New York
Blocked