I happened to look at my call history and found this number 917-507-7776 as an outbound number all through my call history. I never called this number. I have reported it to optimum and they are looking into it. Everyone should report this to their phone company asap if they see it happening on their line.
This number showed up on my callier history (I have Optimum) as an outbound call. It is how the number shows up when you dial *86 to retrieve your messages. I called for messages twice today and both times this is the number that showed.