Who called from 9722320996

This number has been calling our home phone repeatedly for weeks, and always leaving an empty message.  I would like them to stop.

I'm getting calls at a work number, I believe it's a solicitation, yet when I answer the phone no one says anything, so I figured once the caller hears it's a business they just hang up.  Today I let it go to voicemail and the message was just backround noise, sounded like a bunch of people in the background at a call Center, then my caller hummed to himself and hung up.

I was laying down because I was not feeling well and had just got to sleep when the phone rang and woke me up.  I use a CPAP machine and by the time I could get uncovered and my mask off from my head the phone quick ringing!  They left a blank message!  It was from this 972-232-0996 #.

Also receiving multiple calls with empty messages from 972-232-0996. Would like for it to stop.

I got a phone call from this number.  I answered it.  Then the owner of this number hanged up without speaking a word.  I called back this number, the owner of this number simply disconnected the ring without any word.  Very suspicious.