Quote:
Originally Posted by hipster duck
I've heard about how the number of clicks needed is like a time capsule of the importance of cities in the 1940s when the North American Numbering Plan was devised, but some of them still don't make sense. Even back then, were there really more people calling long-distance to St. Louis (314), Western Massachussets (413) or Greater Milwaukee (414), than San Francisco (415)?
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St. Louis was about as big as than SF back then, and it was also (and maybe still is) located in a more densely populated region of the country. In addition to international call volume, there would likely be more calls between cities located in the same region than to cities that area more geographically isolated.
from:
https://en.wikipedia.org/wiki/Original_North_American_area_codes#Assignment_plan
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