Region List
- L4A 0P7 - Stouffville, York, Ontario
- L4A 0P8 - Stouffville, York, Ontario
- L4A 0P9 - Stouffville, York, Ontario
- L4A 0R1 - Stouffville, York, Ontario
- L4A 0R2 - Stouffville, York, Ontario
- L4A 0R3 - Stouffville, York, Ontario
- L4A 0R4 - Stouffville, York, Ontario
- L4A 0R5 - Stouffville, York, Ontario
- L4A 0R6 - Stouffville, York, Ontario
- L4A 0R7 - Stouffville, York, Ontario
- L4A 0R8 - Stouffville, York, Ontario
- L4A 0R9 - Stouffville, York, Ontario
- L4A 0S1 - Stouffville, York, Ontario
- L4A 0S2 - Stouffville, York, Ontario
- L4A 0S3 - Stouffville, York, Ontario
- L4A 0S4 - Stouffville, York, Ontario
- L4A 0S5 - Stouffville, York, Ontario
- L4A 0S6 - Stouffville, York, Ontario
- L4A 0S7 - Stouffville, York, Ontario
- L4A 0S8 - Stouffville, York, Ontario