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  2. Telephone exchange names - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange_names

    Several representations of telephone numbers using central office names capitalized and emboldened the leading letters that were dialed, for example: Kenmore 9392 is a five-pull (1L-4N) small-city telephone number for the Kenmore exchange in Fort Wayne, Indiana. MArket 7032 is a six-digit (2L-4N) telephone number. This format was in use from ...

  3. Area codes 530 and 837 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_530_and_837

    Area code 530 was created in a split of numbering plan area 916 on November 1, 1997. Simultaneously, the Dixon exchange was reassigned from area code 916 to area code 707, and from the Sacramento Local access and transport area (LATA) to the San Francisco LATA.

  4. List of North American Numbering Plan area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_North_American...

    California (Daly City, South San Francisco, Palo Alto, Redwood City, Menlo Park, Mountain View, San Mateo, Santa Clara) August 2, 1997: split of 415; 651: Minnesota (St. Paul, Eagan, Lindstrom, Red Wing, Hastings, Stillwater, and a part of east-central Minnesota) July 12, 1998: split of 612; 652–654: not in use; available for geographic ...

  5. List of California area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_California_area_codes

    In 1947, the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes. The state of California was divided into three numbering plan areas (NPAs) with distinct area codes : 213 , 415 , and 916 , for the southern, central, and northern parts of the ...

  6. Area code 307 - Wikipedia

    en.wikipedia.org/wiki/Area_code_307

    Wyoming's numbering plan area and area code (blue) Area code 307 is the telephone area code in the North American Numbering Plan for the entire U.S. state of Wyoming.It is one of the 86 original North American area codes created by the American Telephone and Telegraph Company (AT&T) in 1947.

  7. List of area code overlays - Wikipedia

    en.wikipedia.org/wiki/List_of_area_code_overlays

    San Francisco, Marin County and small portions of San Mateo County: 629: 615: Nashville, Tennessee: 639: 306: Saskatchewan: 640: 609: Central and southeast New Jersey: 657: 714: Northern Orange County, California: 658: 876: Jamaica: 659: 205: Western and central Alabama: 669: 408: Southern Bay Area in California, encompassing much of Santa ...

  8. Original North American area codes - Wikipedia

    en.wikipedia.org/wiki/Original_North_American...

    Telephone dial number card of c.1948 with the local telephone number 4-5876 in Atlantic City, NJ, using the central office prefix 4, later converted to AT4 Face of a 1939 rotary telephone dial with the telephone number LA-2697, which includes the first two letters of Lakewood, New Jersey, as the central office prefix, later converted to LA6.

  9. Seven-digit dialing - Wikipedia

    en.wikipedia.org/wiki/Seven-digit_dialing

    Seven-digit dialing is a telephone dialing procedure customary in some territories of the North American Numbering Plan (NANP) for dialing telephone numbers in the same numbering plan area (NPA). NANP telephone numbers consist of ten digits, of which the leading three are the area code. In seven-digit dialing it is not necessary to dial the ...