🇨🇦 579 area code
Area code 579 covers Longueuil, Saint-Hyacinthe, Saint-Jean-sur-Richelieu and Saint-Jérôme and the surrounding area in Quebec, Canada. It shares that territory with 354 and 450, so the same neighbourhood can have numbers in any of them. Enter a 579 number below for a free check before you call back.
- Location: Longueuil, Quebec
- Time zone: Eastern (UTC−5)
- In service since August 21, 2010
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Validity, carrier, line type, and region on the first pass.
Area code 579 at a glance
- Area code
- 579
- Location
- Quebec, Canada
- Main cities
- Longueuil, Saint-Hyacinthe, Saint-Jean-sur-Richelieu, Saint-Jérôme, Granby, Repentigny
- Time zone
- Eastern (UTC−5)
- Local time now
- —
- In service since
- August 21, 2010
- Created from
- 450
- Overlay codes
- 354, 450
- Local calls
- Dial 10 digits
- Number format
- (579) 555-0123
- From abroad
- +1 579 555 0123
Cities in the 579 overlay area
- Longueuil
- Saint-Hyacinthe
- Saint-Jean-sur-Richelieu
- Saint-Jérôme
- Granby
- Repentigny
- Saint-Eustache
- Terrebonne
- Laval
- Saint-Hubert
Is a 579 call a scam?
An area code tells you where a number was first assigned, not where the caller is. Mobile numbers keep their area code when people move, and internet (VoIP) numbers can be picked in any area code — so a 579 number can be calling from anywhere.
Robocallers exploit that with "neighbor spoofing": showing a 579 number to people in Quebec because a local-looking call is more likely to be answered. If a 579 call claims to be your bank, the IRS or the CRA or a delivery company, hang up and call the official number yourself.
About area code 579
579 entered service on August 21, 2010, as an overlay on 450, which had run short of numbers.
It is part of the 354/450/579 overlay: the codes cover the same area, and a new line there can be given a number in any of them. Two neighbours — or two phones in one household — can have different area codes. That is also why local calls need the full ten digits.
Because 579 overlays the same ground, the cities listed are those of the codes it shares with.
Area codes
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FAQ
Area code 579 questions
Sources: NANPA NPA database (11/04/2026) and Google libphonenumber. Area codes show where a number was assigned, not where its owner is today.
Where is area code 579?
Area code 579 is in Quebec, Canada. It covers Longueuil, Saint-Hyacinthe, Saint-Jean-sur-Richelieu, Saint-Jérôme, Granby and Repentigny.
What time zone is area code 579?
579 is in the Eastern (UTC−5) time zone, and observes daylight saving time.
What area codes overlay 579?
354 and 450 serve the same area as 579. Numbers in all of them are local to one another.
When did area code 579 start?
579 entered service on August 21, 2010, created from 450.
How do I find out who called me from 579?
Enter the full number in the lookup at the top of this page. The free check confirms whether the number is valid and shows its carrier, line type and region; a full report adds owner and public-web records where they are available.
Why am I getting calls from area code 579?
If you live in or near Quebec, they may be genuinely local — or robocalls spoofing a local-looking number. Unknown 579 callers who will not leave a message are best looked up before you call back.
Got a call from 579?
Run the free check first — validity, carrier, line type and region — and unlock the full report only if you need it.