Very simple solution to this. If it's apple support why does caller id show out of area or unassigned ? I always use 1-800-my apple and any return calls have all said Apple.
It's apple support. They called me multiple times from this number. I originated the call in the first place. It's certainly possible that someone spoofs the number. But if you're like me looking for numbers in caller ID, hopefully, this post jogs your memory about your call with Apple support.
Call back gets "Welcome to Orion Messaging. Please enter the mailbox number of the person you are trying to reach. If you do not have the mailbox number please enter the name...." It goes on to tell you to remain on the line if you need assistance. Sorry, that doesn't really clear up the confusion.