Not just for Ghostbusters

Taking up the challenge from Ross, I looked into the history of the 555 prefix for telephone numbers in movies and TV shows. Turns out it goes all the way back to the 1950s. Here’s part of an entry from Wikipedia:

The phone company began encouraging the producers of television shows and movies to use the 555 prefix for fictional telephone numbers. In older television shows from the 1950s or 1960s, “KLondike 5” or “KLamath 5” was used, as at the time the telephone exchanges used letters. The Simpsons used a variation of this in some of their earlier seasons by having the phone number start out with KL5 (for example, Homer’s Mr. Plow business used both KL5-3223 as the home number and KL5-3226 as the business number. Barney’s Plow King phone number was KL5-4796 in the commercial sung by Linda Ronstadt). On American telephone dial pads, K and L are found on the number 5 button.

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