Area code serving eastern Quebec, Canada.
Area code serving eastern Quebec, Canada. It included eastern Northwest Territories areas before reassignment to 819.
Area code 418 introduced for eastern Quebec
Certain Maine border communities served by Quebec overlay complex
Northwestern Quebec reassigned from 514 to 418
Telephone service introduced in eastern Northwest Territories
NPA 418 reaches jeopardy status
Overlay area code 581 assigned for eastern Quebec
Relief plan for area code 418 approved; overlay NPA 581 selected
CRTC assigns 581 as overlay for 418
NPA 581 overlay on 418 announced
NPA 581 to Overlay NPA 418 (Quebec, Canada)
NPA 581 overlay on 418 announced
NPA 581 to Overlay NPA 418 (Quebec, Canada)
Permissive 10-digit dialing begins for 418/581 overlay
Area code 581 added as overlay for 418
Area code 581 was introduced in June 2008 as an overlay for 418 in eastern Quebec, requiring ten-digit dialing for local calls starting September 6, 2008.
Mandatory 10-digit dialing for 418/581 overlay complex
On September 6, 2008, ten-digit dialing became mandatory for all local calls in eastern Quebec, coinciding with the overlay of area code 581 on area code 418.
Area code 581 overlays area code 418
On September 19, 2008, area code 581 was officially implemented as an overlay for area code 418, providing additional numbering resources for eastern Quebec.
418/581 overlay complex exceeds relief threshold
Relief planning committee established for 418/581
Overlay relief planned with NPA 367
Area code 367 was assigned in 2017 as a second overlay code for eastern Quebec to provide additional numbering resources alongside 418 and 581.
Overlay relief plan for NPA 367 approved
NPA 367 overlay on 418/581 announced
NPA 367 to Overlay NPA 418/581 (Eastern Quebec, Canada)
NPA 367 overlay on 418/581 announced
NPA 367 to Overlay NPA 418/581 (eastern Quebec, Canada).
Area code 367 activated in eastern Quebec
Area code 367 entered service in 2018 as an overlay to the existing 418 and 581 area codes in eastern Quebec, expanding the numbering capacity for the region.
Area code 367 entered service
Area code 367 was introduced in 2018 as a second overlay for eastern Quebec, supplementing existing codes 418 and 581 to increase numbering capacity.
Area code 367 overlays 418/581
On November 24, 2018, area code 367 was implemented as an overlay for the existing 418/581 complex, further expanding numbering capacity in eastern Quebec.
Relief planning committee initiated for 367/418/581 overlay complex
Relief planning committee established for 367/418/581 complex
On January 20, 2025, a relief planning committee was established to address the projected exhaustion of area codes 367, 418, and 581 in eastern Quebec.
Area code 273 reserved for future overlay in eastern Quebec
Area code 273 reserved for future overlay in eastern Quebec
CRTC approves overlay plan for area code 273
NPA 273 overlay on 367/418/581 announced
NPA 273 to Overlay NPA 367/418/581 (Eastern Québec)