this post was submitted on 30 Nov 2023
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the first map of North American area codes (1947) (lemmy.sdf.org)
submitted 10 months ago by lars@lemmy.sdf.org to c/mapporn@lemmy.world
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[–] lars@lemmy.sdf.org 3 points 10 months ago (1 children)

Yes — and the following three digits are called “exchanges”

[–] lars@lemmy.sdf.org 3 points 10 months ago

And it looks like only single-area code states had 0 as their second digit