Region List
- L4A 0A1 - Stouffville, York, Ontario
- L4A 0A2 - Stouffville, York, Ontario
- L4A 0A3 - Stouffville, York, Ontario
- L4A 0A4 - Stouffville, York, Ontario
- L4A 0A5 - Stouffville, York, Ontario
- L4A 0A6 - Stouffville, York, Ontario
- L4A 0A7 - Stouffville, York, Ontario
- L4A 0A8 - Stouffville, York, Ontario
- L4A 0A9 - Stouffville, York, Ontario
- L4A 0B1 - Stouffville, York, Ontario
- L4A 0B2 - Stouffville, York, Ontario
- L4A 0B3 - Stouffville, York, Ontario
- L4A 0B4 - Stouffville, York, Ontario
- L4A 0B5 - Stouffville, York, Ontario
- L4A 0B6 - Stouffville, York, Ontario
- L4A 0B7 - Stouffville, York, Ontario
- L4A 0B8 - Stouffville, York, Ontario
- L4A 0B9 - Stouffville, York, Ontario
- L4A 0C1 - Stouffville, York, Ontario
- L4A 0C2 - Stouffville, York, Ontario