I can remember party lines, my grandmother had a place, barn and 20 acres up in the mountains closer to Mass. & they all had party lines until the 70's.
That and the phone numbers with letters, there is an old store, right on main road here that still has the old letter and numbers on there sign, used to a small grocery, couple of old timers still run it, but sell produce, and seasonal things.
Here in this town, I am not sure when the party lines were changed over, had to be in the 60's. Can remember talking with the operator as a kid, and or being shy to talk to someone who called, when I was real young. I can remember the pranksters, that was popular, my mother had a referee whistle next to the phone, tried to deafen em up, one time it was a friend... oops.
We used to pull some pranks, usually business's won't say what we did, mostly strange but humorous requests, we did it so well, people believed us, that was good clean fun, many times we'd get the people on the other end stunned a bit, laughing, buying into our program, a scant few would get ticked off, but it was rare for a hang up. Nothing obscene or really out of line, just some imaginative humor, by a couple of kids that enjoyed humor to no end, boy did we laugh and have fun, so did some of our victims now if we only recorded these. No *67 in those days you were anonymous. The phone system fascinated me as a kid, I used to fool with old phones and find places to hook into the system, learned my way around interconnection cabinets, was kind of fun, kinda like the linemen, they could drop in on you at anytime, when working on the lines. I soon realized that if you needed to get connected in an emergency, was not that hard at all. A lot of the old linemen said they really screwed up the works when that anti-trust-monopoly thing happened in '83-'84.