On Mon, 31 Jul 2017 14:09:28 -0400, John H
wrote:

The strange one is when your own number pops on the caller ID.

My cell phone number shows up quite often on my land line CID. If I'm running around and think of
something I want to remember later, I'll often call my home phone and leave a message as a reminder.
Works well.
I am talking about the POTS number showing up on the POTS caller ID.