Region List
- L4A 7W8 - Stouffville, York, Ontario
- L4A 7W9 - Stouffville, York, Ontario
- L4A 7X1 - Stouffville, York, Ontario
- L4A 7X3 - Stouffville, York, Ontario
- L4A 7X4 - Stouffville, York, Ontario
- L4A 7X5 - Stouffville, York, Ontario
- L4A 7X6 - Stouffville, York, Ontario
- L4A 7X8 - Stouffville, York, Ontario
- L4A 7X9 - Stouffville, York, Ontario
- L4A 7Y1 - Stouffville, York, Ontario
- L4A 7Y2 - Stouffville, York, Ontario
- L4A 7Y3 - Stouffville, York, Ontario
- L4A 7Y4 - Stouffville, York, Ontario
- L4A 7Y5 - Stouffville, York, Ontario
- L4A 7Y6 - Stouffville, York, Ontario
- L4A 7Y7 - Stouffville, York, Ontario
- L4A 7Y8 - Stouffville, York, Ontario
- L4A 7Y9 - Stouffville, York, Ontario
- L4A 7Z1 - Stouffville, York, Ontario
- L4A 7Z2 - Stouffville, York, Ontario