Liste de la région
- L3X 1P9 - Newmarket, York, Ontario
- L3X 1R1 - Newmarket, York, Ontario
- L3X 1R2 - Newmarket, York, Ontario
- L3X 1R3 - Newmarket, York, Ontario
- L3X 1R4 - Newmarket, York, Ontario
- L3X 1R5 - Newmarket, York, Ontario
- L3X 1R6 - Newmarket, York, Ontario
- L3X 1R7 - Newmarket, York, Ontario
- L3X 1R8 - Newmarket, York, Ontario
- L3X 1R9 - Newmarket, York, Ontario
- L3X 1S1 - Newmarket, York, Ontario
- L3X 1S2 - Newmarket, York, Ontario
- L3X 1S3 - Newmarket, York, Ontario
- L3X 1S4 - Newmarket, York, Ontario
- L3X 1S5 - Newmarket, York, Ontario
- L3X 1S6 - Newmarket, York, Ontario
- L3X 1S7 - Newmarket, York, Ontario
- L3X 1S8 - Newmarket, York, Ontario
- L3X 1S9 - Newmarket, York, Ontario
- L3X 1T1 - Newmarket, York, Ontario