Area code 905
Area code 905 holds 773 in-service central-office prefixes in the CNAC register, covering roughly 7,730,000 telephone numbers. They are split between 12 carriers and 94 rate centres. The largest is Hamilton. Recorded assignments run from October 13, 1999 to July 2, 2019. That ranks it 19 of 55 Canadian area codes by prefix count.
Background reading: Caller ID spoofing, STIR/SHAKEN, and how to actually block calls in Canada · Canadian area codes, overlays, and what a 416 number actually tells you · One-ring scams and the Caribbean area codes that look Canadian
In numbers
- In-service prefixes
- 773
- Telephone numbers covered
- 7,730,000
- Carriers
- 12
- Rate centres
- 94
- Provinces and territories
- 1
- First assignment
- October 13, 1999
- Most recent assignment
- July 2, 2019
Who holds these numbers
Bell Canada holds the largest share at 438 prefixes, 56.7% of the total, ahead of 11 other carriers.
| Carrier | Prefixes | Share | First assigned |
|---|---|---|---|
| Bell Canada | 438 | 56.7 % | 1999 |
| Rogers Communications Canada Inc. (Cable) | 125 | 16.2 % | 1999 |
| Bell Mobility | 49 | 6.3 % | 1999 |
| TELUS Mobility | 48 | 6.2 % | 1999 |
| Rogers Communications Canada Inc. (Wireless) | 36 | 4.7 % | 1999 |
| Fido Solutions Inc. | 27 | 3.5 % | 1999 |
| Zayo Canada Inc. | 21 | 2.7 % | 2000 |
| TELUS Integrated Communications | 19 | 2.5 % | 2000 |
| Primus Telecommunications Canada Inc. | 5 | 0.6 % | 2003 |
| Iristel Inc. | 2 | 0.3 % | 2007 |
| Videotron Ltd. | 2 | 0.3 % | 2018 |
| InnSysVoice Corp | 1 | 0.1 % | 2019 |
Where these numbers land
Prefixes in 905 serve 94 rate centres. A rate centre is the billing area a prefix is attached to, not where the handset is.
How the allocation was built up
| Period | Prefixes | Carriers |
|---|---|---|
| 1995–1999 | 12 | 6 |
| 2000–2004 | 214 | 9 |
| 2005–2009 | 48 | 8 |
| 2015–2019 | 4 | 3 |
495 undated in the register.
Overlay area codes
905 shares its rate centres with 365, 289, 742, 204, 431, 506, 902, 236, 250, 450, 579, 584. Overlay codes cover the same ground, which is why ten-digit dialling is required: two neighbours on one street can hold different area codes.
Allocated prefixes
Showing 304 of 773 prefixes, largest rate centres first.
Hamilton, ON
905-218 · 905-253 · 905-296 · 905-297 · 905-308 · 905-312 · 905-314 · 905-317 · 905-318 · 905-379
Oshawa, ON
905-213 · 905-215 · 905-233 · 905-240 · 905-242 · 905-243 · 905-244 · 905-245 · 905-259 · 905-260
St. Catharines-Thorold, ON
905-225 · 905-227 · 905-228 · 905-246 · 905-280 · 905-321 · 905-322 · 905-323 · 905-324 · 905-325
Brampton, ON
905-216 · 905-226 · 905-230 · 905-291 · 905-450 · 905-451 · 905-452 · 905-453 · 905-454 · 905-455
Cooksville, ON
905-206 · 905-210 · 905-212 · 905-214 · 905-219 · 905-232 · 905-238 · 905-241 · 905-247 · 905-267
Oakville, ON
905-208 · 905-257 · 905-287 · 905-330 · 905-334 · 905-337 · 905-338 · 905-339 · 905-399 · 905-464
Streetsville, ON
905-236 · 905-285 · 905-286 · 905-288 · 905-301 · 905-302 · 905-363 · 905-369 · 905-412 · 905-542
Thornhill, ON
905-326 · 905-370 · 905-418 · 905-482 · 905-530 · 905-532 · 905-597 · 905-660 · 905-669 · 905-695
Unionville, ON
905-248 · 905-258 · 905-300 · 905-305 · 905-307 · 905-316 · 905-413 · 905-415 · 905-470 · 905-474
Malton, ON
905-234 · 905-255 · 905-256 · 905-293 · 905-298 · 905-362 · 905-364 · 905-405 · 905-461 · 905-564
Burlington, ON
905-220 · 905-315 · 905-319 · 905-320 · 905-331 · 905-332 · 905-333 · 905-335 · 905-336 · 905-340
Ajax-Pickering, ON
905-231 · 905-239 · 905-391 · 905-409 · 905-423 · 905-424 · 905-426 · 905-427 · 905-428 · 905-550
Newmarket, ON
905-235 · 905-251 · 905-252 · 905-392 · 905-657 · 905-710 · 905-715 · 905-716 · 905-806 · 905-830
Milton, ON
905-203 · 905-299 · 905-462 · 905-514 · 905-636 · 905-691 · 905-693 · 905-699 · 905-749 · 905-805
Aurora, ON
905-222 · 905-395 · 905-503 · 905-713 · 905-717 · 905-726 · 905-727 · 905-750 · 905-751 · 905-758
Richmond Hill, ON
905-224 · 905-237 · 905-292 · 905-508 · 905-737 · 905-770 · 905-780 · 905-784 · 905-787 · 905-883
Markham, ON
905-201 · 905-202 · 905-205 · 905-209 · 905-294 · 905-350 · 905-368 · 905-471 · 905-472 · 905-554
Niagara Falls, ON
905-262 · 905-295 · 905-351 · 905-353 · 905-354 · 905-356 · 905-357 · 905-358 · 905-371 · 905-374
South Pickering, ON
905-250 · 905-420 · 905-421 · 905-422 · 905-492 · 905-509 · 905-831 · 905-837 · 905-839
Woodbridge, ON
905-264 · 905-265 · 905-266 · 905-605 · 905-652 · 905-663 · 905-850 · 905-851 · 905-856
Clarkson, ON
905-254 · 905-403 · 905-491 · 905-822 · 905-823 · 905-855 · 905-916 · 905-919
Cobourg, ON
905-207 · 905-269 · 905-372 · 905-373 · 905-375 · 905-376 · 905-377 · 905-396
Welland, ON
905-414 · 905-714 · 905-732 · 905-733 · 905-734 · 905-735 · 905-736 · 905-788
Whitby, ON
905-217 · 905-430 · 905-444 · 905-493 · 905-556 · 905-665 · 905-666 · 905-668
Oak Ridges, ON
905-223 · 905-313 · 905-398 · 905-505 · 905-506 · 905-559 · 905-773
Port Credit, ON
905-221 · 905-271 · 905-274 · 905-278 · 905-486 · 905-891 · 905-990
Caledon East, ON
905-584 · 905-586 · 905-587 · 905-588 · 905-757 · 905-860
Maple, ON
905-303 · 905-417 · 905-553 · 905-585 · 905-653 · 905-832
Beeton, ON
905-724 · 905-729 · 905-748 · 905-801 · 905-909
Castlemore, ON
905-200 · 905-204 · 905-794 · 905-913 · 905-915
Fort Erie, ON
905-871 · 905-991 · 905-992 · 905-993 · 905-994
Gormley, ON
905-284 · 905-400 · 905-534 · 905-887 · 905-927
Keswick, ON
905-476 · 905-535 · 905-656 · 905-700 · 905-989
Georgetown, ON
905-702 · 905-703 · 905-873 · 905-877
Stoney Creek, ON
905-594 · 905-662 · 905-664 · 905-930
Bolton, ON
905-533 · 905-857 · 905-951
Bowmanville, ON
905-419 · 905-623 · 905-697
Bradford, ON
905-551 · 905-775 · 905-778
Brooklin, ON
905-425 · 905-620 · 905-655
Claremont, ON
905-408 · 905-490 · 905-649
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.