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  2. List of Oregon area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Oregon_area_codes

    503: The northwestern corner of Oregon, including Portland and its metropolitan area, Salem and other cities 541: All of Oregon outside the northwestern corner, including Eugene. 971: An overlay of area code 503. Until 2008, 971 was a concentrated overlay, meaning it was only present in some parts of the 503 area. Today it is a standard overlay.

  3. Area codes 541 and 458 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_541_and_458

    Area codes 541 and 458 are telephone area codes in the North American Numbering Plan (NANP) for most of the U.S. state of Oregon, excluding only the northwestern corner of the state. The service area includes the cities of Eugene , Springfield , Corvallis , Albany , Medford , Bend , Ashland , Klamath Falls , The Dalles , Burns , Lakeview , and ...

  4. Telephone exchange names - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange_names

    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]

  5. Area codes 503 and 971 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_503_and_971

    In the initial configuration of the nationwide telephone numbering plan designed by AT&T in 1947, [1] the state of Oregon was assigned a single area code, 503. Despite Oregon's growth in the second half of the twentieth century, particularly in the Willamette Valley (Portland and Eugene), this remained so for 48 years, making Oregon one of the largest states by area with a single area code.

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

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

    Oregon (Portland, Salem, Hillsboro, Beaverton, and most of northwestern Oregon) October 1, 2000: 2000: partially overlaid on 503; in 2008, Clatsop County and Tillamook County, originally excluded from the overlay, were added to it; 972: Texas (Dallas metropolitan area) September 14, 1996: split of 214; 1999: 214 and 972 were merged and overlaid ...

  7. List of mobile telephone prefixes by country - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_telephone...

    Users can switch carriers while keeping number and prefix (so prefixes are not tightly coupled to a specific carrier). If there is only 32.. followed by any other, shorter number, like 32 51 724859, this is the number of a normal phone, not a mobile. 46x: Join (discontinued mobile phone service provider) [3] 47x: Proximus (or other) 48x

  8. Telephone prefix - Wikipedia

    en.wikipedia.org/wiki/Telephone_prefix

    A telephone prefix is the first set of digits after the country, and area codes of a telephone number. In the North American Numbering Plan countries (country code 1), it is the first three digits of a seven-digit local phone number, the second three digits of the 3-3-4 scheme. In other countries, both the prefix and the number may have ...

  9. 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.