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spicytuna62@lemmy.world ⁨6⁩ ⁨hours⁩ ago

But it’s also why heavily populated areas have certain area codes. These numbers were just faster to dial. For instance:

Generally, if the area code took less time to dial, odds are it’s an urban code. The emergent pattern is when middle digit is 1 or 2. Like 816 for KCMO or 918 for Tulsa or 416 for Toronto.

And if it featured higher digits or a zero, it was probably rural. Area Code 907 was established in 1957 for almost all of Alaska. That’s 26 total pulses. 906 is for Michigan’s Upper Peninsula and was put into service in 1961 after splitting off from 616, which services Grand Rapids.

Many of the high digit urban area codes were put into use after touch tone dialing became widespread since any number took just as long as any other to dial.

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