Overlay area code introduced in 2010 to relieve numbering exhaustion in the 450 area code region in Quebec.
Overlay area code introduced in 2010 to relieve numbering exhaustion in the 450 area code region in Quebec. It overlays the entire 450 numbering plan area.
NPA 579 overlay on 450 announced
NPA 579 to Overlay NPA 450 (Québec, Canada)
NPA 579 overlay on 450 announced
NPA 579 to Overlay NPA 450 (Québec, Canada)
NPA 579 overlay introduced on 450
Area code 579 was introduced as an overlay to area code 450 in 2010 to provide additional numbering resources for the off-island Montreal suburbs.
Overlay of area code 450 with 579 in Quebec
Area code 354 formally assigned
NPA 354 assigned as additional overlay for 450/579
NPA 354 overlay on 450/579 announced
NPA 354 to Overlay 450/579 (Area served by Montreal, Quebec, Canada)
Relief action for area code 354 overlay suspended
NPA 354 overlay on 450/579 announced
NPA 354 to Overlay 450/579 (Area served by Montreal, Quebec, Canada)- revision
NPA 354 overlay on 450/579 announced
NPA 354 to Overlay NPA 450/579 (area surrounding Montréal, Québec, Canada)
NPA 354 overlay on 450/579 announced
NPA 354 to Overlay NPA 450/579 (area surrounding Montréal, Québec, Canada) - amending PL-573
NPA 354 overlay on 450/579 announced
NPA 354 to Overlay NPA 450/579 (area surrounding Montréal, Québec, Canada) - amending PL-589
NPA 354 activated as overlay for 450/579
Overlay of area code 354 in Quebec
Area code 354 was assigned as an additional overlay for the 450/579 complex, going into service on October 22, 2022, after relief was suspended in 2019.