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Canadian area codes

Ontario area codes

A checked list of 19 in-service geographic area codes in Ontario, with their dates, overlay partners and dialing rules.

Last checked 14 October 2026

Area codes across North America

Codes in service in Ontario

Ontario has 19 geographic area codes in service: 226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 683, 705, 742, 753, 807, 905, 942. 416 is the oldest, dated 1947, and 942 the newest, dated 26 Apr 2025.1 The Canadian administrator describes each code's coverage in the table.2 The time zones across Ontario's codes are Eastern and Eastern and Central.

Area codeAdministrator coverageNPA in-service dateIn-service overlay peersTime zoneLocal calls within the code
226Southwestern Ontario21 Oct 2006382, 519, 548Eastern10 digits
249North-Central Ontario19 Mar 2011683, 705Eastern10 digits
289Southern Ontario9 Jun 2001365, 742, 905Eastern10 digits
343Eastern Ontario17 May 2010613, 753Eastern10 digits
365Southern Ontario25 Mar 2013289, 742, 905Eastern10 digits
382Southwestern Ontario17 Jun 2023226, 519, 548Eastern10 digits
416Metro Toronto1947437, 647Eastern10 digits
437Metro Toronto25 Mar 2013416, 647Eastern10 digits
519Southwestern Ontario1953226, 382, 548Eastern10 digits
548Southwestern Ontario4 Jun 2016226, 382, 519Eastern10 digits
613Eastern Ontario1947343, 753Eastern10 digits
647Metro Toronto5 Mar 2001416, 437Eastern10 digits
683North-Central Ontario18 Jun 2022249, 705Eastern10 digits
705North-Central Ontario1957249, 683Eastern10 digits
742Southern Ontario16 Oct 2021289, 365, 905Eastern10 digits
753Eastern Ontario26 Mar 2022343, 613Eastern10 digits
807Northwestern Ontario1962None listedEastern and Central10 digits
905Southern Ontario4 Oct 1993289, 365, 742Eastern10 digits
942Metro Toronto26 Apr 2025416, 437, 647Eastern10 digits

Scroll the table sideways to see every column. Sources: NANPA (14 October 2026 file) and the Canadian Numbering Administrator.

History and overlays in Ontario

  • Before 1960: 416, 613, 519, 705
  • 1960 to 1989: 807
  • 1990s: 905
  • 2000s: 647, 289, 226
  • 2010s: 343, 249, 365, 437, 548
  • 2020s: 742, 753, 683, 382, 942

Ontario's in-service overlay groups are 226/382/519/548; 249/683/705; 289/365/742/905; 343/613/753; 416/437/647; 416/437/647/942.1

  • 416/437/647/942: 416 (1947) was joined by 647 on 5 Mar 2001, 437 on 25 Mar 2013 and 942 on 26 Apr 2025.
  • 343/613/753: 613 (1947) was joined by 343 on 17 May 2010 and 753 on 26 Mar 2022.
  • 226/382/519/548: 519 (1953) was joined by 226 on 21 Oct 2006, 548 on 4 Jun 2016 and 382 on 17 Jun 2023.
  • 416/437/647: 416 (1947) was joined by 647 on 5 Mar 2001 and 437 on 25 Mar 2013.

Ontario has 2 more overlay groups, visible in the table above.

Dialing in Ontario

Local calls within a single area code in Ontario (226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 683, 705, 742, 753, 807, 905, 942) are all recorded as 10 digits. From any of Ontario's codes, local calls to another area code are all recorded as 10 digits.1

Neighbours of Ontario

Regions that border Ontario:

  • Manitoba: 3 codes (204, 431, 584)
  • Quebec: 12 codes (263, 354, 367, 418, ...)
  • Michigan: 13 codes (231, 248, 269, 313, ...)
  • New York: 23 codes (212, 315, 329, 332, ...)

Rules that apply to every region are on the area-code reference.

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Further reading

Longer research pieces on this topic, each with its own source list and a downloadable PDF.

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Sources

Every regulatory and pricing claim on this page links to the primary source it came from. Figures were checked on the date shown at the top of the page; rules and prices change, so verify before relying on one.

  1. NANPA, NPA Database CSV, file dated 14 October 2026; in-service status, dates, overlay complexes, dialing plan and time zone. Retrieved 14 Oct 2026
    https://reports.nanpa.com/public/npa_report.csv
  2. Canadian Numbering Administrator, CO Code Status directory and coverage labels. Retrieved 14 Oct 2026
    https://www.cnac.ca/co_codes/co_code_status.htm

Keep reading

Reference
How overlays work
Why two codes can serve the same area and what ten-digit dialling changes.
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