Zayo Canada Inc.
Zayo Canada Inc. holds 249 in-service central-office prefixes in the CNAC register, covering roughly 2,490,000 telephone numbers. They span 31 area codes and 97 rate centres across 8 provinces and territories, concentrated in ON. Its earliest recorded assignment dates to 1999, its most recent to 2025.
Background reading: Caller ID spoofing, STIR/SHAKEN, and how to actually block calls in Canada · Your rights: caller data, privacy law and persistent callers
In numbers
- In-service prefixes
- 249
- Telephone numbers covered
- 2,490,000
- Carriers
- 1
- Rate centres
- 97
- Area codes
- 31
- Provinces and territories
- 8
- First assignment
- September 27, 1999
- Most recent assignment
- December 22, 2025
Provinces and territories
| Province | Prefixes | Rate centres |
|---|---|---|
| Ontario | 132 | 52 |
| British Columbia | 35 | 12 |
| Quebec | 33 | 11 |
| Alberta | 31 | 12 |
| Saskatchewan | 10 | 8 |
| Manitoba | 4 | 1 |
| Nova Scotia | 3 | 1 |
| Newfoundland and Labrador | 1 | 1 |
Area codes
Where these numbers land
| Rate centre | Province | Prefixes | Carriers |
|---|---|---|---|
| Toronto | ON | 29 | 1 |
| Ottawa-Hull | ON | 21 | 1 |
| Vancouver | BC | 15 | 1 |
| Calgary | AB | 14 | 1 |
| Montreal | QC | 13 | 1 |
| Edmonton | AB | 7 | 1 |
| Cooksville | ON | 5 | 1 |
| Brampton | ON | 4 | 1 |
| Quebec | QC | 4 | 1 |
| Streetsville | ON | 4 | 1 |
| Thornhill | ON | 4 | 1 |
| Winnipeg | MB | 4 | 1 |
| Halifax | NS | 3 | 1 |
| Hamilton | ON | 3 | 1 |
| Kitchener-Waterloo | ON | 3 | 1 |
| London | ON | 3 | 1 |
| Malton | ON | 3 | 1 |
| North Vancouver | BC | 3 | 1 |
| Regina | SK | 3 | 1 |
| Richmond | BC | 3 | 1 |
| Unionville | ON | 3 | 1 |
| Victoria | BC | 3 | 1 |
| Binbrook | ON | 2 | 1 |
| Burlington | ON | 2 | 1 |
| Caledonia | ON | 2 | 1 |
| Chomedey | QC | 2 | 1 |
| Galt | ON | 2 | 1 |
| Hagersville | ON | 2 | 1 |
| Hespeler | ON | 2 | 1 |
| Kanata-Stittsville | ON | 2 | 1 |
| Lachine | QC | 2 | 1 |
| Mount Hope | ON | 2 | 1 |
| New Westminster | BC | 2 | 1 |
| Newton | BC | 2 | 1 |
| Niagara Falls | ON | 2 | 1 |
| Oakville | ON | 2 | 1 |
| Oshawa | ON | 2 | 1 |
| Pointe-Claire | QC | 2 | 1 |
| Pont-Viau | QC | 2 | 1 |
| Preston | ON | 2 | 1 |
How the allocation was built up
| Period | Prefixes | Carriers |
|---|---|---|
| 1995–1999 | 4 | 1 |
| 2000–2004 | 72 | 1 |
| 2005–2009 | 71 | 1 |
| 2010–2014 | 49 | 1 |
| 2015–2019 | 7 | 1 |
| 2020–2024 | 13 | 1 |
| 2025–2029 | 9 | 1 |
24 undated in the register.
Allocated prefixes
Showing 143 of 249 prefixes, largest rate centres first.
Toronto, ON
416-572 · 416-640 · 416-642 · 416-644 · 416-645 · 416-646 · 416-649 · 416-764 · 416-847 · 437-253 · 437-294 · 437-295 · 437-296
Ottawa-Hull, ON
343-224 · 343-291 · 343-292 · 343-294 · 343-484 · 343-486 · 343-487 · 343-496 · 343-497 · 343-612 · 343-615 · 343-616 · 613-288
Vancouver, BC
236-202 · 236-259 · 236-826 · 236-828 · 604-629 · 604-630 · 604-637 · 604-638 · 604-639 · 778-309 · 778-372 · 778-373 · 778-374
Calgary, AB
403-351 · 403-444 · 403-536 · 403-537 · 403-538 · 403-539 · 403-648 · 403-705 · 587-441 · 587-443 · 587-702 · 587-952 · 587-962
Montreal, QC
438-210 · 438-258 · 438-259 · 438-260 · 438-469 · 514-228 · 514-375 · 514-666 · 514-904 · 514-905 · 514-906 · 514-908 · 514-940
Edmonton, AB
587-442 · 587-701 · 780-229 · 780-701 · 780-702 · 780-801 · 825-442
Cooksville, ON
289-374 · 289-454 · 905-247 · 905-361 · 905-366
Brampton, ON
289-406 · 289-764 · 905-291 · 905-595
Quebec, QC
418-263 · 418-266 · 418-425 · 581-366
Streetsville, ON
289-290 · 289-457 · 905-363 · 905-412
Thornhill, ON
289-502 · 289-695 · 905-418 · 905-695
Winnipeg, MB
204-201 · 204-975 · 204-977 · 431-367
Halifax, NS
902-332 · 902-334 · 902-442
Hamilton, ON
289-667 · 905-538 · 905-667
Kitchener-Waterloo, ON
226-772 · 519-340 · 519-772
London, ON
519-286 · 519-963 · 519-964
Malton, ON
905-234 · 905-362 · 905-364
North Vancouver, BC
604-998 · 778-262 · 778-264
Regina, SK
306-205 · 306-206 · 306-509
Richmond, BC
604-248 · 604-249 · 778-234
Unionville, ON
905-752 · 905-754 · 905-917
Victoria, BC
250-410 · 250-412 · 778-410
Binbrook, ON
289-286 · 289-287
Burlington, ON
289-288 · 289-293
Caledonia, ON
289-284 · 289-285
Chomedey, QC
450-506 · 450-902
Galt, ON
519-231 · 519-629
Hagersville, ON
289-282 · 289-283
Hespeler, ON
519-224 · 519-248
Kanata-Stittsville, ON
613-287 · 613-383
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.