Region List
- L4A 0M1 - Stouffville, York, Ontario
- L4A 0M3 - Stouffville, York, Ontario
- L4A 0M2 - Stouffville, York, Ontario
- L4A 0M4 - Stouffville, York, Ontario
- L4A 0M5 - Stouffville, York, Ontario
- L4A 0M6 - Stouffville, York, Ontario
- L4A 0M7 - Stouffville, York, Ontario
- L4A 0M8 - Stouffville, York, Ontario
- L4A 0M9 - Stouffville, York, Ontario
- L4A 0N1 - Stouffville, York, Ontario
- L4A 0N2 - Stouffville, York, Ontario
- L4A 0N3 - Stouffville, York, Ontario
- L4A 0N8 - Stouffville, York, Ontario
- L4A 0N9 - Stouffville, York, Ontario
- L4A 0P1 - Stouffville, York, Ontario
- L4A 0P2 - Stouffville, York, Ontario
- L4A 0P3 - Stouffville, York, Ontario
- L4A 0P4 - Stouffville, York, Ontario
- L4A 0P5 - Stouffville, York, Ontario
- L4A 0P6 - Stouffville, York, Ontario