I was looking at
Ma Bell's recommended exchange names. I like my hometown prefix, but don't have a home phone. The first two of my cell, 57, was used for radio telephone numbers. My work line starts with 51 so it's not even listed. Pooh. I was going to try to get it going, at least confuse a couple people.
And for 73, they didn't list
PEnnsylvania, as in
Pennsylvania 6-5000.