Who called from 5155551818

Called cellphone.. Lots of background noise like a call center.  No one talked and then it disconnected.

Two calls...no messages

Two calls and no messages.  Answered on the third call, but no sounds on the other end.

This number calls me several times a day and it needs to stop.

Called 3 times today on my cell, answered once but could not understand so I hung up. Has called twice since but I won't answer.