Region List
- L4A 5B6 - Stouffville, York, Ontario
- L4A 5B7 - Stouffville, York, Ontario
- L4A 5B8 - Stouffville, York, Ontario
- L4A 5B9 - Stouffville, York, Ontario
- L4A 5C1 - Stouffville, York, Ontario
- L4A 5C3 - Stouffville, York, Ontario
- L4A 5C4 - Stouffville, York, Ontario
- L4A 5C5 - Stouffville, York, Ontario
- L4A 5C6 - Stouffville, York, Ontario
- L4A 5C7 - Stouffville, York, Ontario
- L4A 5C8 - Stouffville, York, Ontario
- L4A 5C9 - Stouffville, York, Ontario
- L4A 5E1 - Stouffville, York, Ontario
- L4A 5E3 - Stouffville, York, Ontario
- L4A 5E4 - Stouffville, York, Ontario
- L4A 5E5 - Stouffville, York, Ontario
- L4A 5E6 - Stouffville, York, Ontario
- L4A 5E7 - Stouffville, York, Ontario
- L4A 5E8 - Stouffville, York, Ontario
- L4A 5R9 - Stouffville, York, Ontario