Who called from 2154368697

I've gotten many calls from this number.  Everytime I answer there's noone there or they hang up instantly.  I stopped answering the calls when the ID said AMVETS.  This must be their backdoor, covert way to call.

They call and do not answer. You can not call this number.Caller ID says this number is disconnected.

They call and do not answer. You can not call this number.Caller ID says this number is disconnected.

Called this afternoon, heard what sounded like machines in the background, said nothing and hung up.

Received call @ 8:40 PM / No immediate answer / Male voice answers after 30 sec. delay and asked for my wife by name / I told him to hold and he was gone when my wife answered the phone / we called it back and the line was busy