we have recieved several calls from this number, no messages have every been left and when we try to call the number back the operator says the number is no longer in service.

I get this too, a female asks for a "john" i said "who" and she hung up. I tried calling it back and the message says the number has been disconnected.

no message, hang up when answered

I have the same problem from this number

Iyt will call several times a day.  If you try to answer it, it disconnects.  Who has this number?