Area code 579
Area code 579 holds 644 in-service central-office prefixes in the CNAC register, covering roughly 6,440,000 telephone numbers. They are split between 19 carriers and 126 rate centres. The largest is Granby. Recorded assignments run from September 3, 2010 to February 5, 2026. That ranks it 29 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 579 at a glance
- Province or territory
- Quebec
- Main rate centres
- Granby, Joliette, St-Jerome, St-Hyacinthe, Ste-Therese
- Local time
- — Eastern Time (ET), UTC−5; UTC−4 in daylight saving time
- In service since
- August 21, 2010
- Split or overlaid from
- 450
- Number format
- 579-NXX-XXXX · +1 579 NXX XXXX
Sources: CNAC, NANPA (September 25, 2026), Statistics Canada.
In numbers
- In-service prefixes
- 644
- Telephone numbers covered
- 6,440,000
- Carriers
- 19
- Rate centres
- 126
- Provinces and territories
- 1
- First assignment
- September 3, 2010
- Most recent assignment
- February 5, 2026
Who holds these numbers
TELUS Quebec holds the largest share at 122 prefixes, 18.9% of the total, ahead of 18 other carriers.
| Carrier | Prefixes | Share | First assigned |
|---|---|---|---|
| TELUS Quebec | 122 | 18.9 % | 2010 |
| Fibernetics Corporation | 103 | 16.0 % | 2012 |
| Videotron Ltd. | 72 | 11.2 % | 2010 |
| Iristel Inc. | 66 | 10.2 % | 2012 |
| Distributel | 56 | 8.7 % | 2018 |
| ISP Telecom Inc. | 50 | 7.8 % | 2012 |
| Comwave Networks | 44 | 6.8 % | 2013 |
| Cooptel | 37 | 5.7 % | 2013 |
| IXICA Communications Inc. | 26 | 4.0 % | 2021 |
| Bell Canada | 21 | 3.3 % | 2016 |
| TELUS Mobility | 15 | 2.3 % | 2010 |
| Bell Mobility | 7 | 1.1 % | 2014 |
| InnSysVoice Corp | 6 | 0.9 % | 2015 |
| Fido Solutions Inc. | 5 | 0.8 % | 2014 |
| Rogers Communications Canada Inc. (Cable) | 5 | 0.8 % | 2017 |
| Telebec Ltee. | 3 | 0.5 % | 2018 |
| 9164-3122 Quebec inc | 2 | 0.3 % | 2020 |
| Rogers Communications Canada Inc. (Wireless) | 2 | 0.3 % | 2015 |
| Zayo Canada Inc. | 2 | 0.3 % | 2012 |
Where these numbers land
Prefixes in 579 serve 126 rate centres. A rate centre is the billing area a prefix is attached to, not where the handset is.
| Rate centre | Province | Prefixes | Carriers |
|---|---|---|---|
| Granby | QC | 20 | 12 |
| Joliette | QC | 19 | 10 |
| St-Jerome | QC | 17 | 10 |
| St-Hyacinthe | QC | 16 | 11 |
| Ste-Therese | QC | 15 | 10 |
| Longueuil | QC | 14 | 7 |
| Chomedey | QC | 13 | 9 |
| Sorel | QC | 13 | 9 |
| St-Jean | QC | 13 | 8 |
| Laval-Est | QC | 11 | 7 |
| Laval-Ouest | QC | 11 | 7 |
| Pont-Viau | QC | 11 | 8 |
| St-Eustache | QC | 11 | 7 |
| Valleyfield | QC | 11 | 8 |
| Lanoraie | QC | 10 | 6 |
| Ste-Rose | QC | 10 | 8 |
| L'Epiphanie-l'Assomption | QC | 9 | 5 |
| Lachute | QC | 9 | 5 |
| Eastman | QC | 8 | 8 |
| Knowlton | QC | 8 | 7 |
| Mansonville | QC | 8 | 7 |
| Marieville | QC | 8 | 7 |
| St-Lambert | QC | 8 | 5 |
| Sutton | QC | 8 | 7 |
| Berthierville | QC | 7 | 4 |
| Chateauguay | QC | 7 | 6 |
| Frelighsburg | QC | 7 | 6 |
| St-Lin | QC | 7 | 5 |
| St-Vincent-de-Paul | QC | 7 | 5 |
| Waterloo | QC | 7 | 7 |
| Bedford | QC | 6 | 5 |
| Boucherville | QC | 6 | 4 |
| Cowansville | QC | 6 | 4 |
| St-Hippolyte | QC | 6 | 5 |
| St-Sauveur | QC | 6 | 5 |
| Terrebonne | QC | 6 | 5 |
| Beloeil | QC | 5 | 5 |
| Bromont | QC | 5 | 5 |
| Chambly | QC | 5 | 4 |
| Dunham | QC | 5 | 5 |
| Franklin Centre | QC | 5 | 5 |
| Lacolle | QC | 5 | 4 |
| Laprairie | QC | 5 | 4 |
| Le Gardeur | QC | 5 | 3 |
| Mirabel-Aeroport | QC | 5 | 5 |
| Rawdon | QC | 5 | 4 |
| St-Alphonse-de-Rodriguez | QC | 5 | 4 |
| St-Barthelemy | QC | 5 | 4 |
| St-Bruno | QC | 5 | 5 |
| St-Cesaire | QC | 5 | 5 |
| St-Gabriel-de-Brandon | QC | 5 | 5 |
| St-Jean-de-Matha | QC | 5 | 5 |
| St-Marc | QC | 5 | 5 |
| Vercheres | QC | 5 | 5 |
| Actonvale | QC | 4 | 4 |
| Contrecoeur | QC | 4 | 4 |
| Henryville | QC | 4 | 4 |
| Mirabel-St-Augustin | QC | 4 | 4 |
| Napierville | QC | 4 | 3 |
| Ormstown | QC | 4 | 4 |
| Pierreville | QC | 4 | 4 |
| St-Blaise | QC | 4 | 4 |
| St-Calixte-de-Kilkenny | QC | 4 | 4 |
| St-Constant | QC | 4 | 3 |
| St-Denis | QC | 4 | 4 |
| St-Felix-de-Valois | QC | 4 | 4 |
| St-Michel-des-Saints | QC | 4 | 4 |
| St-Paul-D'Abbotsford | QC | 4 | 4 |
| St-Pie | QC | 4 | 4 |
| St-Zenon | QC | 4 | 4 |
| Ste-Julie-de-Vercheres | QC | 4 | 4 |
| Ste-Julienne | QC | 4 | 4 |
| Vaudreuil | QC | 4 | 4 |
| Yamaska | QC | 4 | 4 |
| Coteau-Landing | QC | 3 | 3 |
| Crabtree | QC | 3 | 2 |
| Farnham | QC | 3 | 3 |
| Hemmingford | QC | 3 | 2 |
| Huntingdon | QC | 3 | 3 |
| Lavaltrie | QC | 3 | 3 |
How the allocation was built up
| Period | Prefixes | Carriers |
|---|---|---|
| 2010–2014 | 142 | 11 |
| 2015–2019 | 268 | 15 |
| 2020–2024 | 215 | 10 |
| 2025–2029 | 19 | 4 |
Overlay area codes
579 shares its rate centres with 450, 354. 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 579 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 579: questions and answers
Where is area code 579?
579 serves Quebec. Its 644 in-service prefixes belong to 126 rate centres, mainly Granby, Joliette, St-Jerome and St-Hyacinthe.
What time zone is area code 579 in?
Every placed rate centre in 579 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 579 start?
579 has been in service since August 21, 2010; it was created from 450. It shares its territory with 354 and 450, so a new number there can get any of these codes.
Which carriers hold 579 numbers?
The CNAC register lists 19 carriers with prefixes in 579; the largest are TELUS Quebec (18.9%), Fibernetics Corporation (16%) and Videotron Ltd. (11.2%). 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 579 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 324 of 644 prefixes, largest rate centres first.
Granby, QC
579-213 · 579-232 · 579-255 · 579-361 · 579-365 · 579-380 · 579-420 · 579-442 · 579-488 · 579-589
Joliette, QC
579-244 · 579-248 · 579-337 · 579-377 · 579-425 · 579-500 · 579-501 · 579-502 · 579-503 · 579-559
St-Jerome, QC
579-240 · 579-278 · 579-281 · 579-304 · 579-368 · 579-525 · 579-617 · 579-634 · 579-688 · 579-730
St-Hyacinthe, QC
579-225 · 579-239 · 579-268 · 579-305 · 579-348 · 579-371 · 579-480 · 579-484 · 579-489 · 579-504
Ste-Therese, QC
579-226 · 579-238 · 579-275 · 579-277 · 579-303 · 579-378 · 579-477 · 579-527 · 579-563 · 579-613
Longueuil, QC
579-214 · 579-234 · 579-274 · 579-421 · 579-423 · 579-550 · 579-576 · 579-620 · 579-717 · 579-721
Chomedey, QC
579-231 · 579-252 · 579-399 · 579-539 · 579-618 · 579-640 · 579-666 · 579-679 · 579-680 · 579-847
Sorel, QC
579-243 · 579-249 · 579-269 · 579-276 · 579-363 · 579-369 · 579-492 · 579-493 · 579-548 · 579-606
St-Jean, QC
579-224 · 579-267 · 579-296 · 579-362 · 579-372 · 579-381 · 579-392 · 579-609 · 579-700 · 579-709
Laval-Est, QC
579-218 · 579-306 · 579-505 · 579-568 · 579-569 · 579-599 · 579-660 · 579-804 · 579-807 · 579-939
Laval-Ouest, QC
579-219 · 579-307 · 579-379 · 579-506 · 579-661 · 579-699 · 579-805 · 579-974 · 579-975 · 579-978
Pont-Viau, QC
579-236 · 579-300 · 579-302 · 579-605 · 579-631 · 579-662 · 579-681 · 579-702 · 579-775 · 579-779
St-Eustache, QC
579-251 · 579-352 · 579-485 · 579-486 · 579-586 · 579-607 · 579-633 · 579-734 · 579-818 · 579-862
Valleyfield, QC
579-250 · 579-353 · 579-491 · 579-616 · 579-790 · 579-802 · 579-827 · 579-829 · 579-877 · 579-920
Lanoraie, QC
579-261 · 579-293 · 579-359 · 579-398 · 579-470 · 579-644 · 579-792 · 579-865 · 579-972 · 579-992
Ste-Rose, QC
579-204 · 579-237 · 579-279 · 579-309 · 579-590 · 579-619 · 579-641 · 579-663 · 579-682 · 579-969
L'Epiphanie-l'Assomption, QC
579-262 · 579-294 · 579-428 · 579-475 · 579-604 · 579-795 · 579-796 · 579-984 · 579-986
Lachute, QC
579-200 · 579-366 · 579-632 · 579-655 · 579-778 · 579-791 · 579-798 · 579-803 · 579-817
Eastman, QC
579-326 · 579-437 · 579-469 · 579-521 · 579-532 · 579-739 · 579-744 · 579-823
Knowlton, QC
579-322 · 579-387 · 579-438 · 579-533 · 579-571 · 579-710 · 579-786 · 579-831
Mansonville, QC
579-328 · 579-441 · 579-523 · 579-531 · 579-768 · 579-780 · 579-788 · 579-822
Marieville, QC
579-222 · 579-313 · 579-330 · 579-400 · 579-401 · 579-572 · 579-772 · 579-859
St-Lambert, QC
579-241 · 579-266 · 579-382 · 579-612 · 579-621 · 579-720 · 579-723 · 579-880
Sutton, QC
579-329 · 579-388 · 579-436 · 579-534 · 579-560 · 579-581 · 579-677 · 579-789
Berthierville, QC
579-208 · 579-263 · 579-287 · 579-358 · 579-393 · 579-472 · 579-643
Chateauguay, QC
579-288 · 579-513 · 579-601 · 579-840 · 579-860 · 579-932 · 579-977
Frelighsburg, QC
579-327 · 579-343 · 579-440 · 579-522 · 579-535 · 579-554 · 579-707
St-Lin, QC
579-283 · 579-407 · 579-466 · 579-567 · 579-899 · 579-993 · 579-996
St-Vincent-de-Paul, QC
579-242 · 579-285 · 579-308 · 579-577 · 579-578 · 579-664 · 579-683
Waterloo, QC
579-325 · 579-336 · 579-439 · 579-580 · 579-678 · 579-797 · 579-850
Bedford, QC
579-270 · 579-297 · 579-412 · 579-433 · 579-483 · 579-537
Boucherville, QC
579-215 · 579-230 · 579-715 · 579-872 · 579-882 · 579-900
Cowansville, QC
579-212 · 579-216 · 579-320 · 579-570 · 579-770 · 579-874
St-Hippolyte, QC
579-284 · 579-367 · 579-406 · 579-422 · 579-465 · 579-566
St-Sauveur, QC
579-201 · 579-373 · 579-476 · 579-614 · 579-965 · 579-995
Terrebonne, QC
579-468 · 579-507 · 579-615 · 579-808 · 579-863 · 579-914
Beloeil, QC
579-229 · 579-600 · 579-771 · 579-883 · 579-949
Bromont, QC
579-256 · 579-319 · 579-385 · 579-674 · 579-750
Chambly, QC
579-220 · 579-312 · 579-689 · 579-716 · 579-885
Dunham, QC
579-321 · 579-386 · 579-675 · 579-738 · 579-755
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.