Area code 354 – Quebec
354 has served Quebec since 2022, split from 450. It is still largely empty: 64 of 800 number blocks allocated. Other CLEC / VoIP is the largest holder with 42.2%. It shares its geography with overlay codes 450, 579, so local calls take all ten digits. Most of its numbers are in Valleyfield, Chateauguay, Longueuil.
- Province
- Quebec
- In service since
- 2022
- Time zone
- Eastern
Who holds 354 number blocks
Share of the 64 assigned NXX blocks (8% of the 786 possible), across 1 carriers. This is share of number blocks, not of subscribers.
- Other CLEC / VoIP42.2%
Rate centers in 354
NANPA allocates number blocks to rate centers and records their names abbreviated to ten characters, so these are NANPA's codes rather than place names – CHAMPAURBN is Champaign-Urbana, NWYRCYZN01 is a New York City zone. We show them unchanged instead of guessing at the full names. Showing the largest 5 of 54.
Timeline
- 2022 354 goes into service, split from or overlaid on 450.
More about 354
Separate pages for the questions that need their own answer: what time it is there, what the complaint data says, who holds the number blocks, and how the code compares with the one it shares its area with.
Frequently asked about 354
Where is area code 354?
Quebec. It covers the same area as 354/450/579.
Which carrier owns 354 numbers?
Other CLEC / VoIP holds the largest share of assigned number blocks at 42.2%. This is share of number blocks, not of subscribers – people keep their numbers when they switch carriers.
Do I need to dial 10 digits in 354?
Yes – ten digits for local calls in 354, because it shares its area with another code.
Sources and verification
- NANPA – NPA Database (npa_report.csv), file date 11/01/2026, retrieved Nov 1, 2026
- NANPA – CO Code Assignment Records, All States (utilized), file updated 11/01/2026, retrieved Nov 1, 2026
NANPA dialing note for this code: “10D”. Reviewed by the data desk. Spotted an error? Request a correction.