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do you remember the 2001 hit area codes by Ludacris he's using area codes to call out all the places where he has gotten biblical with ladies when you see a map of all his area codes two things become clear one Ludacris has very specific geographic tastes and two there's no apparent logic to the way our area codes have been laid out our sip codes have an orderly logic starting in the Northeast with zero the first digit increases as you travel west our interstate system has its own logic to even-numbered highways travel east to west the east-west routes start with the lowest number highway 10 down south odd-numbered highways travel north and south they start with interstate 5 on the west coast New York city's grid follows this logic as you go north or west the street numbers get higher when it comes to area codes there is a method to the madness but it's got more to do with population and the form factor of old phones than it does with geography mr. Hansen plays long-distance calling I'm sorry the line is busy in the beginning your phone line ended as a jack on a switchboard in the telephone company's office the operator sat at the switchboard connecting your call to your neighbor literally completing the circuit with small pieces of wire in the late 1870s there were so few phones in a given town that the phone lines were identified by name as phones became more common we needed a better identification system so we started identifying individuals phones with a combination of the name of the local exchange and five numbers each exchange could facilitate about 10,000 phone subscribers the people running the bail system realized they'd never be able to hire enough operators and build enough switchboards to keep up with rising demand new numbers kept coming old numbers were used more awesome we hurried to keep ahead we added new switchboards and more and more operators but it wasn't enough we figured out that someday there wouldn't be enough girls in the entire country to handle the growing demand it would be more efficient and profitable to devise a system where you didn't need operators at all a completely digit based system so in the 1940s Bell engineers began devising the north american numbering plan it divided the United States and Canada into 86 separate regions each region assigned a unique three-digit code the area code the area codes allowed the primitive computers to do the routing that human operators had once done they also gave us a bigger supply of unique phone numbers the codes were assigned by population and the particular Hardware in use at the time the rotary dial New York City the most densely populated and economically significant city was given an area code that would be fastest to dial to 1/2 a mere 5 pulls on the rotary dial Chicago and LA the next biggest cities...