Regionenliste
- L3T 1T1 - Thornhill, York, Ontario
- L3T 1T2 - Thornhill, York, Ontario
- L3T 1T3 - Thornhill, York, Ontario
- L3T 1T4 - Thornhill, York, Ontario
- L3T 1T5 - Thornhill, York, Ontario
- L3T 1T6 - Thornhill, York, Ontario
- L3T 1T7 - Thornhill, York, Ontario
- L3T 1T8 - Thornhill, York, Ontario
- L3T 1T9 - Thornhill, York, Ontario
- L3T 1V1 - Thornhill, York, Ontario
- L3T 1V2 - Thornhill, York, Ontario
- L3T 1V3 - Thornhill, York, Ontario
- L3T 1V4 - Thornhill, York, Ontario
- L3T 1V5 - Thornhill, York, Ontario
- L3T 1V6 - Thornhill, York, Ontario
- L3T 1V7 - Thornhill, York, Ontario
- L3T 1V8 - Thornhill, York, Ontario
- L3T 1V9 - Thornhill, York, Ontario
- L3T 1W1 - Thornhill, York, Ontario
- L3T 1W2 - Thornhill, York, Ontario