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  2. List of Colorado area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Colorado_area_codes

    Area code 303 is the original area code assigned to the entire state when the first nationwide telephone numbering plan was created in 1947. Today it only serves the greater Denver Metropolitan Area. Area codes 720 and 983 are overlay codes for today's 303 numbering plan area (NPA). Area code 719 serves Colorado Springs and southeastern Colorado.

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

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

    once reserved as a third area code for West Virginia, but it was replaced by a 304-932 exchange area code + exchange number in Charleston; 933: not in use; available for non-geographic assignment easily recognizable code (ERC) 934: New York (Suffolk County on Long Island) July 16, 2016: overlaid on 631; 935: not in use; available for geographic ...

  4. 30 Scam Phone Numbers To Block and Area Codes To Avoid - AOL

    www.aol.com/19-dangerous-scam-phone-numbers...

    Look at the area code: Start by comparing the phone number’s area code to the list of area codes you should never answer. If it’s on the list, there’s a good chance there’s a scammer on ...

  5. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    The all-number calling plan increased the number of permissible central office prefixes from 540 to potentially 800, but the first two digits of the central office code were still restricted to the range 2 to 9, and the eight combinations that ended in 11 were reserved as special calling codes. [32]

  6. List of mobile telephone prefixes by country - Wikipedia

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

    Mobile phones use geographic area codes (two digits): after that, all numbers assigned to mobile service have nine digits, starting with 6, 7, 8 or 9 (example: 55 15 99999–9999). 90 is not possible, because collect calls start with this number.

  7. Category:Area codes in Colorado - Wikipedia

    en.wikipedia.org/.../Category:Area_codes_in_Colorado

    Map of Colorado area codes in blue (with border states) Pages in category "Area codes in Colorado" The following 4 pages are in this category, out of 4 total.

  8. Area code 385 - Wikipedia

    en.wikipedia.org/?title=Area_code_385&redirect=no

    Retrieved from "https://en.wikipedia.org/w/index.php?title=Area_code_385&oldid=421746324"

  9. Area codes 801 and 385 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_801_and_385

    A map of Utah with the 801 and 385 area code overlay highlighted in red The original 801 area code, as shown on a 1952 map. Area codes 801 and 385 are telephone area codes in the North American Numbering Plan (NANP) serving Salt Lake City and the four surrounding counties of the Wasatch Front in north-central Utah. The numbering plan area ...