Lista de la región
- L3X 3H6 - Newmarket, York, Ontario
- L3X 3H7 - Newmarket, York, Ontario
- L3X 3H8 - Newmarket, York, Ontario
- L3X 3H9 - Newmarket, York, Ontario
- L3X 3J1 - Newmarket, York, Ontario
- L3X 3J2 - Newmarket, York, Ontario
- L3X 3J3 - Newmarket, York, Ontario
- L3X 3J4 - Newmarket, York, Ontario
- L3X 3J5 - Newmarket, York, Ontario
- L3X 3J6 - Newmarket, York, Ontario
- L3X 3J7 - Newmarket, York, Ontario
- L3X 3J8 - Newmarket, York, Ontario
- L3X 3J9 - Newmarket, York, Ontario
- L3X 3K1 - Newmarket, York, Ontario
- L3X 3K2 - Newmarket, York, Ontario
- L3X 3K3 - Newmarket, York, Ontario
- L3X 3K4 - Newmarket, York, Ontario
- L3X 3K5 - Newmarket, York, Ontario
- L3X 3K6 - Newmarket, York, Ontario
- L3X 3K7 - Newmarket, York, Ontario