Lista de região
- K9A 1W5 - Cobourg, Northumberland, Ontario
- K9A 1W6 - Cobourg, Northumberland, Ontario
- K9A 1W7 - Cobourg, Northumberland, Ontario
- K9A 1W8 - Cobourg, Northumberland, Ontario
- K9A 1X1 - Cobourg, Northumberland, Ontario
- K9A 1X2 - Cobourg, Northumberland, Ontario
- K9A 1X3 - Cobourg, Northumberland, Ontario
- K9A 1X4 - Cobourg, Northumberland, Ontario
- K9A 1X5 - Cobourg, Northumberland, Ontario
- K9A 1X6 - Cobourg, Northumberland, Ontario
- K9A 1X7 - Cobourg, Northumberland, Ontario
- K9A 1X8 - Cobourg, Northumberland, Ontario
- K9A 1X9 - Cobourg, Northumberland, Ontario
- K9A 1Y1 - Cobourg, Northumberland, Ontario
- K9A 1Y2 - Cobourg, Northumberland, Ontario
- K9A 1Y3 - Cobourg, Northumberland, Ontario
- K9A 1Y4 - Cobourg, Northumberland, Ontario
- K9A 1Y5 - Cobourg, Northumberland, Ontario
- K9A 1Y6 - Cobourg, Northumberland, Ontario
- K9A 1Y7 - Cobourg, Northumberland, Ontario