List of future North American area codes

This is a list of future area codes in the North American Numbering Plan (NANP) in the planning stages for relief of central office code exhaustion in the given numbering plan areas (NPAs). The dates are subject to change during implementation as published in the official NANP Administrator Planning letters.

List
New area codeJurisdictionAffected NPAProjected Exhaust date*Effective date
227 Maryland 240/301 2023 – 2nd Qtr June 14, 2023[1]
235 Missouri 573 2024 – 3rd Qtr March 24, 2024[2]
257 British Columbia 604/250/778/236/672 2025 – 4th Qtr May 24, 2025
324 Florida 904 2024 – 3rd Qtr February 26, 2024
327 Arkansas 870 2024 – 2nd Qtr February 20, 2024[3]
353 Wisconsin 608 2024 – 3rd Qtr September 15, 2023[4][5]
382 Ontario 519/226/548 2024 – 2nd Qtr June 17, 2023[6]
436 Ohio 440 2025 – 2nd Qtr March 1, 2024[7]
457 Louisiana 318 2026 – 1st Qtr None
624 New York 716 2025 – 2nd Qtr November 16, 2023[8]
645 Florida 305/786[9] 2023 – 4th Qtr August 4, 2023
679 Michigan 313 2026 – 2nd Qtr None
686 Virginia 804 2024 – 3rd Qtr February 1, 2024[10]
730 Illinois 618 2024 – 2nd Qtr July 7, 2023[11]
738 California 213/323 2025 - 2nd Qtr None
821 South Carolina 864 2025 – 1st Qtr January 19, 2024[12]
879 Newfoundland and Labrador 709 2024 – 4th Qtr None
924 Minnesota 507 2025 - 1st Qtr None
942 Ontario 416/647/437 2025 – 4th Qtr April 26, 2025
975 Missouri 816 2025 – 1st Qtr October 13, 2023[13]

†Indicates planned overlay.

*Indicates exhaust date of the existing area code(s) that require relief.[14]

  • Area code 480's boundary with area codes 602 and 623 will be eliminated on September 12, 2023, to provide relief to area codes 480 and 602.[15]

See also

References
  1. "Area Code 227 - Details, official location, official service date, history and time zone".
  2. "Area Code 235 - Official Usage, Details, Location, History".
  3. "Area Code 327 - Details, official location, official service date, history and time zone".
  4. "As Madison region grows, a new area code is coming to south central Wisconsin". 26 September 2022.
  5. "Area Code 353 - Official Usage, Details, Location, History".
  6. "Area Code 382 - Details, official location, official service date, history and time zone".
  7. "Planning Letter PL-610: NPA 436 and 440 All-Services Overlay (Ohio)" (PDF). NANPA. 2023-02-16. Retrieved 2023-03-06.
  8. "716, meet your new area code: 624". 19 October 2022.
  9. "Miami is Growing: New Telephone Area Code 645 Added on Top of 305 & 786 to Meet Demand".
  10. Planning Letter PL-608
  11. "Area Code 730 - Details, official location, official service date, history and time zone".
  12. "Planning Letter PL-606, NPA 821 and 864 All-Services Overlay (South Carolina)" (PDF). NANPA. 2022-11-28. Retrieved 2022-12-02.
  13. "Area Code 975 - Details, official location, official service date, history and time zone".
  14. "NPAs Exhausting in the Next 36 Months" (.xlsx). NANPA. 10 April 2015. Retrieved 10 April 2015.
  15. "Arizona Corporation Commission November Open Meeting Highlights".
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