ever tried calling an old phone number you used to have?

That’s a good idea

i called on number...it was one of my old middle school teachers

no i don't even remember my old numbers i font even know my number now

No that'd feel awful
Like calling my old self and being reminded that she's dead.

No.
However my friends repeatedly called one of mine to the point they eventually got screamed at saying if one more person for me, they would hurt them.

Yup two specifically. Neither has ever been reassigned. Hard to believe as many times they get reassigned almost immediately