Who called from 2019177014

I keep getting calls and one was at 4:15AM but when I call back it rings then makes a noise.  I want it stopped.

This number calls repeatedly, most recently at 4:54 am and 8:41 am.  No answer or message.  If you call back, it says "We're sorry, your call cannot be completed at this time.  Please hang up and try your call again later.  Thank you."

called on my work number, left no message on voicemail- silence.  Reading the posts- should we be concerned?

Got the call at work - answered and got no response.

Called at 6:30am on a Saturday morning.  On my personal cell phone.  Didn't leave message. I'm in Los Angeles, CA