Region List
- L3X 1A6 - Newmarket, York, Ontario
- L3X 1A7 - Newmarket, York, Ontario
- L3X 1A8 - Newmarket, York, Ontario
- L3X 1A9 - Newmarket, York, Ontario
- L3X 1B1 - Newmarket, York, Ontario
- L3X 1B2 - Newmarket, York, Ontario
- L3X 1B3 - Newmarket, York, Ontario
- L3X 1B4 - Newmarket, York, Ontario
- L3X 1B5 - Newmarket, York, Ontario
- L3X 1B6 - Newmarket, York, Ontario
- L3X 1B7 - Newmarket, York, Ontario
- L3X 1B8 - Newmarket, York, Ontario
- L3X 1B9 - Newmarket, York, Ontario
- L3X 1C1 - Newmarket, York, Ontario
- L3X 1C2 - Newmarket, York, Ontario
- L3X 1C3 - Newmarket, York, Ontario
- L3X 1C4 - Newmarket, York, Ontario
- L3X 1C5 - Newmarket, York, Ontario
- L3X 1C6 - Newmarket, York, Ontario
- L3X 1C7 - Newmarket, York, Ontario