Who called from 2132893454

Have received several calls from this number.  Never leaves a message.  How can we block?

This is a robo call. I hung up as it was spamming

Called and left no message

Received a call from this number on my cell phone.  I was away from the phone and came back to have a voicemail from a number that showed up on Caller ID as "ZzZz Do Not Answer" which I thought was really strange.  It was from a collection company looking for someone I have never heard of.  Seems like if they wanted to talk to someone their called id would not include "Do not answer".  Sounds like a major scam.

Called my cell phone, but left no message