Long-distance digits long ago shed their monetary worth, but they gained something else in its place: cultural value.
I grew up in Carmel, smack in the middle of the new code region; my first cell phone number—the only cell phone number I have ever had—bears that 831 preface. I have held on to those three digits through happily-multiple changes of location (New Jersey, New York, Boston, Washington) and through unhappily-multiple losses of handset. The powers that be—hardware salespeople, cell service representatives—have, at one time or another, tried to force me into a 609 and a 917 and a 617; each time, I have resisted. Because I am not, fundamentally, a 609 or a 917 or a 617. I am not even, my current residence notwithstanding, a 202. I am an 831, wherever I may be in body, and will remain an 831 until they pry those three otherwise totally meaningless digits out of my cold, dead iPhone.