Region List
- L3X 1Y8 - Newmarket, York, Ontario
- L3X 1Y9 - Newmarket, York, Ontario
- L3X 1Z1 - Newmarket, York, Ontario
- L3X 1Z2 - Newmarket, York, Ontario
- L3X 1Z3 - Newmarket, York, Ontario
- L3X 1Z4 - Newmarket, York, Ontario
- L3X 1Z5 - Newmarket, York, Ontario
- L3X 1Z6 - Newmarket, York, Ontario
- L3X 1Z7 - Newmarket, York, Ontario
- L3X 1Z8 - Newmarket, York, Ontario
- L3X 1Z9 - Newmarket, York, Ontario
- L3X 2A1 - Newmarket, York, Ontario
- L3X 2A2 - Newmarket, York, Ontario
- L3X 2A3 - Newmarket, York, Ontario
- L3X 2A4 - Newmarket, York, Ontario
- L3X 2A5 - Newmarket, York, Ontario
- L3X 2A6 - Newmarket, York, Ontario
- L3X 2A7 - Newmarket, York, Ontario
- L3X 2A8 - Newmarket, York, Ontario
- L3X 2A9 - Newmarket, York, Ontario