My voicemail suddenly stopped working. Odd, becasue I've had the same phone, same number for years.
Callers would get a message "This number is not connected. Please call again later".
When I got into the settings of my phone, call forwarding for the 'forward when unanswered' option were going to this number above. No idea how, or if my phone has been hacked, but better to alert others than say nothing.

I have had the same thing happen today. From a Landline the message to caller was that I was not connected, and from other mobile devices the message was "Please call back later and ensure you have the correct area code" Its weird. I went into my phone settings for Call forwarding and the number to forward calls when unanswered was that number #####0002 above. I Changed it back to my message bank number and all good now.

Same happened to me divert if unreachable and number +61 1272240002 its happened a lot, Could be a HACKER Mark Gear Bonnet Bay ADV computer parts an equipment.