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Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]
Area code 603 in a 1956 map, covering the whole state.. Area code 603 is the sole area code for the U.S. state of New Hampshire in the North American Numbering Plan (NANP). It was created as one of the original 86 numbering plan areas in October 1947.
Telephone numbers in Canada follow the fixed-length format of the North American Numbering Plan (NANP) of a three-digit area code, a three-digit central office code (or exchange code), and a four-digit station or line code. This is represented as NPA NXX XXXX. [1]
When a subscriber dialed the number of a manual station, an operator at the destination office answered the call after seeing the number on an indicator, and connected the call by plugging a cord into the outgoing circuit and ringing the destination station. For example, if a dial customer calling from TAylor 4725 dialed a number served by a ...
On July 16, 2020, the FCC adopted rules to establish 988 as the three-digit phone number for the National Suicide Prevention Lifeline. [2] This required 82 area codes to switch to mandatory ten-digit dialing by October 24, 2021, because they had already used 988 as a central office code .
Map showing Maine's 207 area code (in red) and neighboring area codes in New Hampshire (USA); New Brunswick and Quebec, (Canada). Area code 207 is the sole telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Maine.
Aug. 19—Three people killed in a Route 101 crash in Candia on Saturday afternoon included a couple from North Hampton, police said Monday. The driver of a Jeep Grand Wagoneer was Richard ...
This is a list of international dialing prefixes used in various countries for direct dialing of international telephone calls.These prefixes are typically required only when dialling from a landline, while in GSM-compliant mobile phone (cell phone) systems, the symbol + before the country code may be used irrespective of where the telephone is used at that moment; the network operator ...