my cell phone registered it as "potential spam" and I don't answer calls from anywhere that isn't in my directory. Must be a robot call as there was a 3 second empty voice message. This number is now blocked on my phone, never to bother me again.

Got a call from this number , did not answer .  This number did not leave a voice mail. I do not answer unknown numbers unless they leave me a voice mail for why they are calling and I know it is not a scam or fraud caller. White pages reports  it as suspected spam.

Forgot to add that people who did answer the call reported it as a scam. With some callers it was something about auto warranty and others said it was something about student debt. Sounds like a scam caller.

Called, but no identity, just says Tennessee. Did not answer

Didn't answer and no message. Called back and had the "call can't be completed" message.