Original North American area codes - Wikipedia
In 1951, the number of area codes grew to ninety: the State of New York gained area code 516 on Long Island, and Southern California received area code 714, to reduce the numbering plan area of Los Angeles.
Our Numbered Days: The Evolution of the Area Code
2014年2月13日 · The area codes that lead our own phone numbers today—212, 202, 415—were direct results of their work. They were also based on a particular type of hardware: rotary phones.
List of North American Numbering Plan area codes - Wikipedia
Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits. A numbering plan area with multiple area codes is called an overlay .
The Unexpected Logic Behind Area Codes - Atlas Obscura
2017年12月5日 · The decisions made with area codes early in the history of the telephone system have deeply impacted everything that’s come since.
North American Numbering Plan - Wikipedia
Each NPA was assigned a unique three-digit code, typically termed NPA code or simply area code. These codes were first used in Operator Toll Dialing by long-distance operators in establishing calls via trunks between toll offices.
The Weird Logic Behind Area Codes - Tedium: The Dull Side of …
2017年10月31日 · The number of area code assignments, or Numbering Plan Areas (NPAs), that existed in North America in 1947, when the system was first put into place. According to telephone researcher Linc Madison, 34 states and D.C. had just one area code at the time, while New York had five and a single area code covered three Canadian provinces. At the time ...
History of Area Codes
Area codes tell us about where in the country or the globe a line is originating from and they are the first step to understanding who is trying to contact you—but this wasn’t always the case. AT&T and Bell Laboratories originally invented area codes in the 1940s in the United States.
United States of America Area Codes / USA Area Code Map / …
On January 1, 1947, the first North American area codes were issued in regions where standard 7 digit dialing codes were scheduled to be exhaused the soonest. By adding a 3 digit prefix to a 7 digit local number, this allowed for hundreds of millons of new phone numbers to be issued.
Where Area Codes Came From, And Why They Don't Make Sense
2017年11月3日 · From 818 to 305, sea to shining sea. Back in the 1940s, with the country expanding and demand for telephones increasing, the Bell phone companies decided to implement a bold new plan:...
When Did Area Codes Start? History of the Phone Number
Once the technology was established, telephone companies were started, phone numbers were invented, area codes were designated, switchboard operators were hired, and people connected to emergency services by dialing 911.
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