Unfamiliar number in an area where I'm not expecting a call; returned it with Caller ID blocked, and it came up "cannot be completed as dialed". That tells me it's a scammer using VoIP with the Caller ID spoofed to a randomly selected number.
Just got a call from 440-381-8233. It's an Ohio number and I don't know anyone from Ohio so I did not answer it. They did not leave a message either. I always say, " If it's important, they will leave a message." I don't trust any calls from unknown numbers.