Area code 354
Area code 354 holds 57 in-service central-office prefixes in the CNAC register, covering roughly 570,000 telephone numbers. They are split between 6 carriers and 50 rate centres. The largest is Valleyfield. Recorded assignments run from May 10, 2022 to February 27, 2026. 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
Area code 354 at a glance
- Province or territory
- Quebec
- Main rate centres
- Valleyfield, Hemmingford, Joliette, Longueuil, Rigaud
- Local time
- — Eastern Time (ET), UTC−5; UTC−4 in daylight saving time
- In service since
- October 22, 2022
- Split or overlaid from
- 450
- Number format
- 354-NXX-XXXX · +1 354 NXX XXXX
Sources: CNAC, NANPA (September 25, 2026), Statistics Canada.
In numbers
- In-service prefixes
- 57
- Telephone numbers covered
- 570,000
- Carriers
- 6
- Rate centres
- 50
- Provinces and territories
- 1
- First assignment
- May 10, 2022
- Most recent assignment
- February 27, 2026
Who holds these numbers
Cogeco Connexion Inc. holds the largest share at 23 prefixes, 40.4% of the total, ahead of 5 other carriers.
| Carrier | Prefixes | Share | First assigned |
|---|---|---|---|
| Cogeco Connexion Inc. | 23 | 40.4 % | 2025 |
| IXICA Communications Inc. | 23 | 40.4 % | 2022 |
| ISP Telecom Inc. | 4 | 7.0 % | 2023 |
| Iristel Inc. | 4 | 7.0 % | 2023 |
| TELUS Mobility | 2 | 3.5 % | 2022 |
| Rogers Communications Canada Inc. (Wireless) | 1 | 1.8 % | 2024 |
Where these numbers land
Prefixes in 354 serve 50 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 |
| Pont-Viau | 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 | 24 | 2 |
Overlay area codes
354 shares its rate centres with 450, 579. Overlay codes cover the same ground, which is why ten-digit dialling is required: two neighbours on one street can hold different area codes.
Phone and text fraud in Quebec
In 2024 the Canadian Anti-Fraud Centre received 2,629 fraud reports from Quebec where the first contact was a phone call (2,120) or a text (509); 1,080 came from victims, who reported $10.1 million lost. The most common types were bank investigator, phishing, service.
January to September 2025: 1,567 reports (-22% on the same months of 2024) and $7.9 million reported lost (+4%).
Source: Canadian Anti-Fraud Centre open data (Open Government Licence – Canada), current to September 29, 2025. These are province-wide figures, not specific to one area code, and only a fraction of fraud is ever reported. Dataset
Had a call from a 354 number?
No clear pattern in reports on these numbers yet. If a call worried you:
- Call back on a number you trust
If a caller says they are your bank, the Canada Revenue Agency, a courier or your phone company, hang up and call the organization on the number from its website or your statement, never the number that called you. Caller ID can be faked.
- Report the fraud
Report the call or text to the Canadian Anti-Fraud Centre online or at 1-888-495-8501. If you lost money or gave out personal details, tell your bank first, then your local police.
- Register on the National Do Not Call List
Registering a landline or mobile on the National DNCL is free. Registered charities, political parties, newspapers and companies you already do business with may still call.
- Forward suspicious texts to 7726
Forward a scam or spam text to 7726 (SPAM on the keypad). It's free, and your carrier uses it to block the sender. Don't tap links or reply.
Area code 354: questions and answers
Where is area code 354?
354 serves Quebec. Its 57 in-service prefixes belong to 50 rate centres, mainly Valleyfield, Hemmingford, Joliette and Longueuil.
What time zone is area code 354 in?
Every placed rate centre in 354 is on Eastern Time (ET, UTC−5), with daylight saving time (UTC−4) from the second Sunday in March to the first Sunday in November.
When did area code 354 start?
354 has been in service since October 22, 2022; it was created from 450. It shares its territory with 450 and 579, so a new number there can get any of these codes.
Which carriers hold 354 numbers?
The CNAC register lists 6 carriers with prefixes in 354; the largest are Cogeco Connexion Inc. (40.4%), IXICA Communications Inc. (40.4%) and ISP Telecom Inc. (7%). Numbers can be ported, so the original carrier may not be the current one.
Is phone fraud rising in Quebec?
In the Canadian Anti-Fraud Centre's open data, call and text fraud reports from Quebec went from 2,016 in January–September 2024 to 1,567 in the same months of 2025 (-22%). Reported losses went from $7.6 million to $7.9 million.
How do I report a scam call from a 354 number?
Report it to the Canadian Anti-Fraud Centre (1-888-495-8501). If you lost money, call your bank first, then your local police. Unwanted telemarketing goes to the National Do Not Call List, and spam texts can be forwarded to 7726.
Allocated prefixes
Showing 47 of 57 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
Pont-Viau, QC
354-233
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
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.