Got a call today from this number and it was a recording saying "hello please hold for the next available operator". After listening to that 5 times in a row I hung up.
Received call from this same number as it appeared on the cell phone. However, the caller didn't give me your "please hold" message. Instead it said : "Thank you for calling Mercy." I disconnected immediately. (There is a Mercy Hospital in Portland, Maine and 358 is a Portland Exchange number).