Just juggled some numbers and realized that the old 5781 number (the one that I always think of as the family number, since my parents had it from the time I was old enough to really know what my phone number was) is about to turn 50. My parents got the phone number in the summer of 1959, shortly before I started the first grade (I finished kindergarten in Cedartown prior to making the move). I changed my answering machine message to acknowledge the half-century anniversary.
(Back then, we only thought of our phone number as a seven-digit number. Come to think of it, I don't even think I knew what my area code was until I was about ten years old, when I went out of town to visit David Lynch for a week and had to dial all ten digits to call my parents.)
I also went ahead and finalized the switchover of my old iPhone over to the 5781 number; ATT was very helpful, finding a way to restructure my package so that I got the second iPhone activated and added the 2G data plan without spending any more than I was spending for just a standard phone. I still have an affection for my first iPhone, even with its old 2G limitations, and even though it was a year and a half old, it was still about two decades ahead of the basic Samsung phone that ATT gave me when they set up the account.
Having the same phone number in the family for a half-century... well, it strikes me as a significant anniversary, anyway!...