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  2. Area codes 510 and 341 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_510_and_341

    Area code 510 was established on September 2, 1991, in a split from area code 415. [1] On March 14, 1998, the inland portion of the East Bay was split off as area code 925 . The dividing line followed the Berkeley Hills ; almost everything west of the hills stayed in 510, while everything east of the hills transferred to 925.

  3. List of California area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_California_area_codes

    View history; General ... with distinct area codes: 213, 415, and 916, ... it will also be overlaid by area code 738. 341: overlay with 510: started service on July ...

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

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

    Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.

  5. The East Bay is getting a new area code next month - AOL

    www.aol.com/news/east-bay-getting-area-code...

    CHANGE IS COMING: The East Bay first got its 510 area code almost thirty years ago. Now, it's getting a new area code. Residents we spoke to say they identify with 510. How do you feel about this?

  6. Original North American area codes - Wikipedia

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

    This makes the fastest-dialing area code 212 (5 total clicks), followed by 312 and 213 (6 clicks). The area code 605 is much slower than these, at 21 clicks. Many large US cities generally had fast-dialing area codes with the middle digit 1. Touch-tone dialing, introduced later, eliminated the wait.

  7. Area codes 415 and 628 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_415_and_628

    View history; Tools. Tools. move to sidebar hide. ... Area codes 415 and 628 are telephone area codes in the North American ... 1991, area code 510 was created for ...

  8. Telephone numbering plan - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbering_plan

    When dialing a telephone number, the area code may have to be preceded by a trunk prefix or national access code for domestic calls, and for international calls by the international access code and country code. Area codes are often quoted by including the national access code. For example, a number in London may be listed as 020 7946 0321.

  9. Lists of North American area codes - Wikipedia

    en.wikipedia.org/wiki/Lists_of_North_American...

    The largest telephone numbering plan in North American is the North American Numbering Plan (NANP), serving 25 regions or countries. Other countries maintain an autonomous numbering plan with distinct country codes within the international E.164 specifications by the International Telecommunication Union.