Liste de la région
- L3X 3K8 - Newmarket, York, Ontario
- L3X 3K9 - Newmarket, York, Ontario
- L3X 3L1 - Newmarket, York, Ontario
- L3X 3L2 - Newmarket, York, Ontario
- L3X 3L3 - Newmarket, York, Ontario
- L3X 3L4 - Newmarket, York, Ontario
- L3X 3L5 - Newmarket, York, Ontario
- L3X 3L6 - Newmarket, York, Ontario
- L3X 3L7 - Newmarket, York, Ontario
- L3X 3L8 - Newmarket, York, Ontario
- L3Y 0A1 - Newmarket, York, Ontario
- L3Y 0A2 - Newmarket, York, Ontario
- L3Y 0A3 - Newmarket, York, Ontario
- L3Y 0A4 - Newmarket, York, Ontario
- L3Y 0A5 - Newmarket, York, Ontario
- L3Y 0A6 - Newmarket, York, Ontario
- L3Y 0A7 - Newmarket, York, Ontario
- L3Y 0A8 - Newmarket, York, Ontario
- L3Y 1A1 - Newmarket, York, Ontario
- L3Y 1A2 - Newmarket, York, Ontario