Ontario area codes
Ontario has 19 area codes, all on UTC−5 standard time. Each card shows the main cities; open one for its overlays, history and a free lookup.
FAQ
Ontario area code questions
How many area codes does Ontario have?
Ontario has 19 area codes in service: 226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 683, 705, 742, 753, 807, 905 and 942.
What was the original Ontario area code?
416 and 613 were among the original area codes created in 1947.
What is the newest area code in Ontario?
942, in service since April 26, 2025 as an overlay on 416, 437 and 647.
What time zones are Ontario area codes in?
Eastern and Central — the region spans more than one zone, so check the code.
Nummer abfragen
Gültigkeit, Anbieter, Leitungstyp und Region im ersten Durchgang.
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Sources: NANPA NPA database (11/04/2026) and Google libphonenumber. Area codes show where a number was assigned, not where its owner is today.