Area code 354
Area code 354 holds 56 in-service central-office prefixes in the CNAC register, covering roughly 560,000 telephone numbers. They are split between 6 carriers and 49 rate centres. The largest is Valleyfield. Recorded assignments run from May 10, 2022 to October 15, 2025. That ranks it 50 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
- 56
- Telephone numbers covered
- 560,000
- Carriers
- 6
- Rate centres
- 49
- Provinces and territories
- 1
- First assignment
- May 10, 2022
- Most recent assignment
- October 15, 2025
Who holds these numbers
IXICA Communications Inc. holds the largest share at 23 prefixes, 41.1% of the total, ahead of 5 other carriers.
| Carrier | Prefixes | Share | First assigned |
|---|---|---|---|
| IXICA Communications Inc. | 23 | 41.1 % | 2022 |
| Cogeco Connexion Inc. | 22 | 39.3 % | 2025 |
| ISP Telecom Inc. | 4 | 7.1 % | 2023 |
| Iristel Inc. | 4 | 7.1 % | 2023 |
| TELUS Mobility | 2 | 3.6 % | 2022 |
| Rogers Communications Canada Inc. (Wireless) | 1 | 1.8 % | 2024 |
Where these numbers land
Prefixes in 354 serve 49 rate centres. A rate centre is the billing area a prefix is attached to, not where the handset is.
| Rate centre | Province | Prefixes | Carriers |
|---|---|---|---|
| Valleyfield | QC | 3 | 3 |
| Hemmingford | QC | 2 | 2 |
| Joliette | QC | 2 | 2 |
| Longueuil | QC | 2 | 2 |
| Rigaud | QC | 2 | 2 |
| St-Lambert | QC | 2 | 2 |
| Bedford | QC | 1 | 1 |
| Berthierville | QC | 1 | 1 |
| Boucherville | QC | 1 | 1 |
| Chambly | QC | 1 | 1 |
| Chateauguay | QC | 1 | 1 |
| Clarenceville | QC | 1 | 1 |
| Coteau-Landing | QC | 1 | 1 |
| Coteau-du-Lac | QC | 1 | 1 |
| Farnham | QC | 1 | 1 |
| Granby | QC | 1 | 1 |
| Henryville | QC | 1 | 1 |
| Hudson | QC | 1 | 1 |
| Huntingdon | QC | 1 | 1 |
| Knowlton | QC | 1 | 1 |
| Lachute | QC | 1 | 1 |
| Lacolle | QC | 1 | 1 |
| Laprairie | QC | 1 | 1 |
| Mirabel-Ste-Scholastique | QC | 1 | 1 |
| Napierville | QC | 1 | 1 |
| Rawdon | QC | 1 | 1 |
| Riviere-Beaudette | QC | 1 | 1 |
| Saint-Liboire | QC | 1 | 1 |
| Sorel | QC | 1 | 1 |
| St-Blaise | QC | 1 | 1 |
| St-Constant | QC | 1 | 1 |
| St-Denis | QC | 1 | 1 |
| St-Hippolyte | QC | 1 | 1 |
| St-Hyacinthe | QC | 1 | 1 |
| St-Jean | QC | 1 | 1 |
| St-Jerome | QC | 1 | 1 |
| St-Pie-de-Guire | QC | 1 | 1 |
| St-Sauveur | QC | 1 | 1 |
| St-Thomas-d'Aquin | QC | 1 | 1 |
| St-Vincent-de-Paul | QC | 1 | 1 |
| St-Zephirin | QC | 1 | 1 |
| Ste-Justine-de-Newton | QC | 1 | 1 |
| Ste-Marthe | QC | 1 | 1 |
| Ste-Rosalie | QC | 1 | 1 |
| Ste-Rose | QC | 1 | 1 |
| Ste-Therese | QC | 1 | 1 |
| Ste-Victoire | QC | 1 | 1 |
| Vaudreuil | QC | 1 | 1 |
| Venise-en-Quebec | QC | 1 | 1 |
How the allocation was built up
| Period | Prefixes | Carriers |
|---|---|---|
| 2020–2024 | 33 | 5 |
| 2025–2029 | 23 | 2 |
Overlay area codes
354 shares its rate centres with 450, 579, 807. 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 47 of 56 prefixes, largest rate centres first.
Valleyfield, QC
354-206 · 354-444 · 354-580
Hemmingford, QC
354-227 · 354-399
Joliette, QC
354-212 · 354-880
Longueuil, QC
354-209 · 354-333
Rigaud, QC
354-220 · 354-700
St-Lambert, QC
354-307 · 354-888
Bedford, QC
354-544
Berthierville, QC
354-210
Boucherville, QC
354-200
Chambly, QC
354-222
Chateauguay, QC
354-201
Clarenceville, QC
354-899
Coteau-Landing, QC
354-600
Coteau-du-Lac, QC
354-666
Farnham, QC
354-299
Granby, QC
354-217
Henryville, QC
354-499
Hudson, QC
354-500
Huntingdon, QC
354-300
Knowlton, QC
354-218
Lachute, QC
354-219
Lacolle, QC
354-599
Laprairie, QC
354-800
Mirabel-Ste-Scholastique, QC
354-533
Napierville, QC
354-699
Rawdon, QC
354-216
Riviere-Beaudette, QC
354-777
Saint-Liboire, QC
354-245
Sorel, QC
354-225
St-Blaise, QC
354-799
St-Constant, QC
354-221
St-Denis, QC
354-224
St-Hippolyte, QC
354-215
St-Hyacinthe, QC
354-205
St-Jean, QC
354-207
St-Jerome, QC
354-999
St-Pie-de-Guire, QC
354-477
St-Sauveur, QC
354-214
St-Thomas-d'Aquin, QC
354-204
St-Vincent-de-Paul, QC
354-235
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.