Ontario area codes
Ontario uses 19 area codes. The oldest is 416, in service since 1947; the newest is 942, from 2025. Across them 9,978 of 15,200 possible number blocks are allocated, 65.6% of capacity. 416, 519, 226, 647, 905, 289, 613 and 705 are at or past 95%, which is why new numbers there come from overlays rather than the original code. No single national carrier dominates: in 14 of them the largest share of blocks sits with smaller CLEC and VoIP providers taken together. In the 33 days to 30 October 2026, FTC complaints named an Ontario caller ID 3,955 times – 1.7% of all complaints in the window, most often 365 with 430 (231st of 422 nationally). The province spans 2 time zones (Eastern and Central); 807 crosses a zone boundary alone. The CNA records 1,768 exchange areas across the province's codes. Canadian number blocks are administered by the CNA rather than NANPA, so block counts come from a separate file with a different maximum per code (800, not 786).
All 19 codes
| Code | In service | Blocks used | Largest holder | Complaints | Shares area with |
|---|---|---|---|---|---|
| 226 | 2006 | 778/800 | Other CLEC / VoIP 31.6% | 315 | 382, 519, 548 |
| 249 | 2011 | 587/800 | – | 160 | 683, 705 |
| 289 | 2001 | 772/800 | Other CLEC / VoIP 25.9% | 401 | 365, 742, 905 |
| 343 | 2010 | 644/800 | Other CLEC / VoIP 31.4% | 188 | 613, 753 |
| 365 | 2013 | 706/800 | Other CLEC / VoIP 30.2% | 430 | 289, 742, 905 |
| 382 | 2023 | 67/800 | Other CLEC / VoIP 34.3% | 22 | 226, 519, 548 |
| 416 | 1947 | 779/800 | – | 306 | 437, 647 |
| 437 | 2013 | 563/800 | – | 115 | 416, 647 |
| 519 | 1953 | 779/800 | Other CLEC / VoIP 14.2% | 290 | 226, 382, 548 |
| 548 | 2016 | 515/800 | Other CLEC / VoIP 18.4% | 156 | 226, 382, 519 |
| 613 | 1947 | 772/800 | Other CLEC / VoIP 7.5% | 366 | 343, 753 |
| 647 | 2001 | 778/800 | – | 340 | 416, 437 |
| 683 | 2022 | 81/800 | Other CLEC / VoIP 54.3% | – | 249, 705 |
| 705 | 1957 | 770/800 | Other CLEC / VoIP 17.3% | 376 | 249, 683 |
| 742 | 2021 | 149/800 | Other CLEC / VoIP 51% | 6 | 289, 365, 905 |
| 753 | 2022 | 111/800 | Other CLEC / VoIP 37.8% | 10 | 343, 613 |
| 807 | 1962 | 297/800 | Other CLEC / VoIP 12.8% | 111 | no overlay |
| 905 | 1993 | 773/800 | – | 363 | 289, 365, 742 |
| 942 | 2025 | 57/800 | Other CLEC / VoIP 5.3% | – | 416, 437, 647 |
Block share is share of allocated number blocks, not of subscribers. Complaint counts cover 28 Sep – 30 Oct 2026 and reflect spoofed caller IDs as much as real calls. Canadian blocks are administered by the CNA; the maximum per code is 800 rather than 786.
How full Ontario’s codes are
A code holds at most 800 blocks of 10,000 numbers each. When a code fills up, the administrator does not reclaim numbers – it adds an overlay, and from then on new numbers in the same area come from the new code.
Full or nearly full
Who holds the number blocks
Counted as the number of the province’s codes in which each holder has the largest share. Block-level totals are not available for Canadian codes, so we do not add per-code percentages into a province-wide figure – that would be an estimate dressed up as a measurement.
| Holder | Largest in | Appears in |
|---|---|---|
| Other CLEC / VoIP | 14 codes | 14 codes |
“Other CLEC / VoIP” is not one company: it is every holder outside the national carriers counted together, which is what resellers and app-based numbers look like in the records. This is allocation, not subscribers.
Spam complaints naming Ontario codes
FTC Do Not Call complaints where the caller ID shown was a Ontario number, 28 Sep – 30 Oct 2026 (33 days). Caller IDs on spam calls are routinely faked, so these are complaints about the code, not calls proven to come from it.
| Code | Complaints | National rank |
|---|---|---|
| 365 | 430 | #231 of 422 |
| 289 | 401 | #250 of 422 |
| 705 | 376 | #259 of 422 |
| 613 | 366 | #267 of 422 |
| 905 | 363 | #269 of 422 |
What people said the calls were about
- Reducing your debt (credit cards, mortgage, student loans) – 176
- Other – 90
- No Subject Provided – 17
- Calls pretending to be government, businesses, or family and friends – 16
Topics as the complainant chose them, for the codes where the FTC published a topic.
How Ontario got its codes
2 in the 1940s, 2 in the 1950s, 1 in the 1960s, 1 in the 1990s, 3 in the 2000s, 5 in the 2010s, 5 in the 2020s. Each code after the first was split off from or overlaid on one already in service.
- 1947 416 goes into service.
- 1947 613 goes into service.
- 1953 519 goes into service.
- 1957 705 goes into service.
- 1962 807 goes into service.
- 1993 905 goes into service, split from or overlaid on 416.
- 2001 289 goes into service, split from or overlaid on 905.
- 2001 647 goes into service, split from or overlaid on 416.
- 2006 226 goes into service, split from or overlaid on 519.
- 2010 343 goes into service, split from or overlaid on 613.
- 2011 249 goes into service, split from or overlaid on 705.
- 2013 365 goes into service, split from or overlaid on 905.
- 2013 437 goes into service, split from or overlaid on 416.
- 2016 548 goes into service, split from or overlaid on 226.
- 2021 742 goes into service, split from or overlaid on 905.
- 2022 683 goes into service, split from or overlaid on 705.
- 2022 753 goes into service, split from or overlaid on 613.
- 2023 382 goes into service, split from or overlaid on 519.
- 2025 942 goes into service, split from or overlaid on 416.
Time zones
Ontario is in Eastern, Central time. 807 covers more than one zone within a single area code, so the code alone does not tell you what time it is there. This code spans 2 time zones.
Cities and exchanges in Ontario
The Canadian Numbering Administrator records which codes serve each exchange area by name.
Frequently asked about Ontario area codes
How many area codes does Ontario have?
19 in service. They are 226, 249, 289, 343, 365, 382, 416, 437, 519, 548, 613, 647, 683, 705, 742, 753, 807, 905 and 942.
What is the oldest area code in Ontario?
416, in service since 1947. Every later code in the province was split off from or overlaid on an existing one.
What is the newest area code in Ontario?
942, from 2025, overlaying 416.
Is Ontario running out of numbers?
416, 519, 226, 647, 905, 289, 613 and 705 are at or past 95% of capacity, but NANPA has not opened relief planning for them, so no new code is announced.
What time zone is Ontario in?
It spans 2: Eastern and Central. 807 covers more than one zone within a single area code, so the code alone does not tell you the time.
Which Ontario area code gets the most spam complaints?
365 – 430 FTC complaints in the 33 days to 30 October 2026, 231st of 422 codes nationally. Those are complaints about the caller ID shown, and spam callers routinely fake a local-looking number, so this says the code is imitated often, not that the calls come from there.
Which carrier holds the most Ontario numbers?
No one carrier does. In 14 of the province's 19 codes the largest share of number blocks is held not by a national carrier but by smaller CLEC and VoIP providers counted together – which is what resellers and app-based numbers look like in the records. This is allocation of blocks by the numbering administrator, not a count of subscribers – people keep their numbers when they switch carriers.
Do you have to dial 10 digits in Ontario?
Yes. Every code in the province is in an overlay or ten-digit dialing area, so a local call needs the area code too. Dialing seven digits reaches a recording, not a wrong number.
Which cities in Ontario have their own area code pages?
101 exchange areas are covered, from Toronto, Ottawa-Hull and Hamilton down to single-exchange towns. The CNA publishes exchange areas by name, so these are real places.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- Canadian Numbering Administrator – CO Code Status, data date 2026-10-31, retrieved Nov 1, 2026
- FTC – Do Not Call Reported Calls Data, 28 Sep – 30 Oct 2026, retrieved Nov 1, 2026
Figures on this page are counted from those files, not copied from other sites. Spotted an error? Request a correction. How we collect and check: methodology.