Phone prefixes in Valleyfield, QC
Valleyfield, QC is a rate centre in the Canadian numbering plan. CNAC records 34 in-service prefixes there, held by 14 carriers and spread across 3 area codes (450, 579, 354).
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
- 34
- Telephone numbers covered
- 340,000
- Carriers
- 14
- Area codes
- 3
- Provinces and territories
- 1
- First assignment
- March 10, 2000
- Most recent assignment
- March 26, 2025
Area codes
Who holds these numbers
Bell Canada holds the largest share at 8 prefixes, 23.5% of the total, ahead of 13 other carriers.
| Carrier | Prefixes | Share | First assigned |
|---|---|---|---|
| Bell Canada | 8 | 23.5 % | 2000 |
| TELUS Mobility | 5 | 14.7 % | 2000 |
| Iristel Inc. | 4 | 11.8 % | 2015 |
| Videotron Ltd. | 4 | 11.8 % | 2005 |
| Bell Mobility | 2 | 5.9 % | 2005 |
| Rogers Communications Canada Inc. (Wireless) | 2 | 5.9 % | 2008 |
| TELUS Quebec | 2 | 5.9 % | 2006 |
| Cogeco Connexion Inc. | 1 | 2.9 % | 2025 |
| Comwave Networks | 1 | 2.9 % | 2015 |
| Distributel | 1 | 2.9 % | 2010 |
| Fido Solutions Inc. | 1 | 2.9 % | 2006 |
| ISP Telecom Inc. | 1 | 2.9 % | 2006 |
| IXICA Communications Inc. | 1 | 2.9 % | 2022 |
| Rogers Communications Canada Inc. (Cable) | 1 | 2.9 % | 2017 |
Allocated prefixes
All 34 in-service prefixes, grouped by rate centre.
Valleyfield, QC
354-206 · 354-444 · 354-580 · 450-219 · 450-288 · 450-322 · 450-369 · 450-370 · 450-371 · 450-373 · 450-374 · 450-377 · 450-544 · 450-567 · 450-601 · 450-631 · 450-747 · 450-801 · 450-802 · 450-807 · 450-854 · 450-859 · 450-921 · 579-250 · 579-353 · 579-491 · 579-616 · 579-790 · 579-802 · 579-827 · 579-829 · 579-877 · 579-920 · 579-961
Nearby rate centres
| Rate centre | Province | Prefixes | Carriers |
|---|---|---|---|
| Montreal | QC | 1,272 | 23 |
| Quebec | QC | 282 | 16 |
| Ottawa-Hull | QC | 122 | 18 |
| Sherbrooke | QC | 104 | 17 |
| Trois-Rivieres | QC | 71 | 16 |
| Chicoutimi | QC | 64 | 16 |
| Granby | QC | 52 | 16 |
| Alma | QC | 48 | 13 |
| Joliette | QC | 48 | 16 |
| St-Jerome | QC | 46 | 12 |
| Drummondville | QC | 45 | 17 |
| St-Hyacinthe | QC | 42 | 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.