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.
よくある質問
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.
番号を調べる
1 回目の照会で、有効性・通信事業者・回線種別・地域が分かります。
All North American area codes · International country codes
Sources: NANPA NPA database (11/04/2026) and Google libphonenumber. Area codes show where a number was assigned, not where its owner is today.