Phone prefixes in Oshawa, ON
Oshawa, ON is a rate centre in the Canadian numbering plan. CNAC records 110 in-service prefixes there, held by 20 carriers and spread across 4 area codes (905, 289, 365, 742).
Background reading: Canadian area codes, overlays, and what a 416 number actually tells you · Caller ID spoofing, STIR/SHAKEN, and how to actually block calls in Canada
In numbers
- In-service prefixes
- 110
- Telephone numbers covered
- 1,100,000
- Carriers
- 20
- Area codes
- 4
- Provinces and territories
- 1
- First assignment
- December 22, 1999
- Most recent assignment
- March 7, 2025
Area codes
Who holds these numbers
Bell Canada holds the largest share at 22 prefixes, 20.0% of the total, ahead of 19 other carriers.
| Carrier | Prefixes | Share | First assigned |
|---|---|---|---|
| Bell Canada | 22 | 20.0 % | 2016 |
| Bell Mobility | 13 | 11.8 % | 2000 |
| Iristel Inc. | 13 | 11.8 % | 2008 |
| Rogers Communications Canada Inc. (Wireless) | 13 | 11.8 % | 1999 |
| TELUS Mobility | 11 | 10.0 % | 2000 |
| Rogers Communications Canada Inc. (Cable) | 6 | 5.5 % | 2004 |
| Videotron Ltd. | 6 | 5.5 % | 2009 |
| TELUS Integrated Communications | 5 | 4.5 % | 2002 |
| Distributel | 4 | 3.6 % | 2006 |
| Fibernetics Corporation | 3 | 2.7 % | 2006 |
| Fido Solutions Inc. | 3 | 2.7 % | 2001 |
| IXICA Communications Inc. | 2 | 1.8 % | 2020 |
| Zayo Canada Inc. | 2 | 1.8 % | 2001 |
| Beanfield Technologies Inc. | 1 | 0.9 % | 2021 |
| Comwave Networks | 1 | 0.9 % | 2013 |
| ISP Telecom Inc. | 1 | 0.9 % | 2009 |
| InnSysVoice Corp | 1 | 0.9 % | 2015 |
| Primus Telecommunications Canada Inc. | 1 | 0.9 % | 2004 |
| Rogers Communications Canada Inc. | 1 | 0.9 % | 2019 |
| TekSavvy Solutions Inc | 1 | 0.9 % | 2021 |
Allocated prefixes
All 110 in-service prefixes, grouped by rate centre.
Oshawa, ON
289-222 · 289-240 · 289-254 · 289-274 · 289-312 · 289-316 · 289-355 · 289-356 · 289-367 · 289-385 · 289-404 · 289-405 · 289-481 · 289-512 · 289-600 · 289-634 · 289-671 · 289-675 · 289-676 · 289-685 · 289-688 · 289-701 · 289-712 · 289-731 · 289-830 · 289-869 · 289-886 · 289-918 · 289-927 · 289-928 · 289-939 · 289-943 · 289-979 · 289-991 · 289-992 · 289-996 · 365-244 · 365-334 · 365-358 · 365-377 · 365-391 · 365-392 · 365-393 · 365-394 · 365-442 · 365-499 · 365-633 · 365-662 · 365-688 · 365-703 · 365-716 · 365-774 · 365-799 · 365-800 · 365-802 · 365-808 · 365-845 · 365-881 · 365-993 · 742-333 · 742-746 · 905-213 · 905-215 · 905-233 · 905-240 · 905-242 · 905-243 · 905-244 · 905-245 · 905-259 · 905-260 · 905-261 · 905-404 · 905-410 · 905-429 · 905-431 · 905-432 · 905-433 · 905-434 · 905-435 · 905-436 · 905-438 · 905-439 · 905-440 · 905-441 · 905-442 · 905-443 · 905-447 · 905-448 · 905-449 · 905-498 · 905-571 · 905-576 · 905-579 · 905-644 · 905-674 · 905-675 · 905-718 · 905-720 · 905-721 · 905-723 · 905-725 · 905-728 · 905-743 · 905-809 · 905-914 · 905-922 · 905-924 · 905-925 · 905-926
Nearby rate centres
| Rate centre | Province | Prefixes | Carriers |
|---|---|---|---|
| Toronto | ON | 2,141 | 24 |
| Ottawa-Hull | ON | 441 | 20 |
| Hamilton | ON | 221 | 23 |
| London | ON | 217 | 23 |
| Kitchener-Waterloo | ON | 164 | 21 |
| Windsor | ON | 133 | 20 |
| Brampton | ON | 116 | 20 |
| St. Catharines-Thorold | ON | 107 | 19 |
| Barrie | ON | 95 | 18 |
| Oakville | ON | 90 | 18 |
| Kingston | ON | 83 | 19 |
| Markham | ON | 81 | 17 |
Allocation source: Canadian Numbering Administrator (CNAC), the registry that records which carrier a central-office code was originally issued to. An allocation says who was issued the prefix, not who serves the number today: numbers can be ported between carriers, and caller ID can be spoofed outright.