579 area code
Granby area, Eastern Time.Area code 579 covers Granby, Joliette, St-Jerome and 123 more places in Quebec, on Eastern Time. 354 and 450 cover the same area.
Right now in Granby
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer)
Calling hours: Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PM (Canada's CRTC rules)
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Where 579 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 579 has 126. Each one's share is how many 579 numbers start there.
- Granby3%
- Joliette3%
- St-Jerome3%
- St-Hyacinthe2%
- Ste-Therese2%
- Longueuil2%
- Sorel2%
- St-Jean2%
- Chomedey2%
Also: Pont-Viau, Valleyfield, Laval-Ouest, St-Eustache, Laval-Est, Ste-Rose, Lanoraie, Lachute, L'Epiphanie-l'Assomption, St-Lambert, Marieville, Knowlton + 105 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 579 number?
Sales calls to homes and cell phones have legal hours, set by Canada's CRTC rules. Hold every 579 number to them, since you can't tell a work line from a personal cell.
What applies to 579Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PM
- Canada (CRTC)Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PMApplies to calls to businesses too. Some provinces add rules the tool doesn't apply, like British Columbia's ban on calls on statutory holidays.CRTC Unsolicited Telecommunications Rules, Part III, s. 23 (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
579 and 354 and 450
579 went into service on August 21, 2010. 579, 354 and 450 cover the same area, so new numbers can get any of them and neighbors can have different area codes. 579 holds 44% of the area's exchanges; 450 holds the most. Local calls take all 10 digits.
- 1998450 overlay
- 2010579 starts
- 2022354 overlay
Source: NANPA area code database
Calling a list of 579 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
579 area code FAQ
What area code is 579?
579 is a Quebec area code for Granby, Joliette, St-Jerome, St-Hyacinthe and 122 more places.
What time zone is the 579 area code in?
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer).
Is 354 the same as 579?
Same area, different code. 579, 354 and 450 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 579 numbers?
Mon to Fri, 9 AM to 9:30 PM · Sat to Sun, 10 AM to 6 PM, local time, under Canada's CRTC rules.
When did the 579 area code start?
On August 21, 2010.
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