Region List
- L3X 1K5 - Newmarket, York, Ontario
- L3X 1K6 - Newmarket, York, Ontario
- L3X 1K7 - Newmarket, York, Ontario
- L3X 1K8 - Newmarket, York, Ontario
- L3X 1K9 - Newmarket, York, Ontario
- L3X 1L1 - Newmarket, York, Ontario
- L3X 1L2 - Newmarket, York, Ontario
- L3X 1L3 - Newmarket, York, Ontario
- L3X 1L4 - Newmarket, York, Ontario
- L3X 1L5 - Newmarket, York, Ontario
- L3X 1L6 - Newmarket, York, Ontario
- L3X 1L7 - Newmarket, York, Ontario
- L3X 1L8 - Newmarket, York, Ontario
- L3X 1L9 - Newmarket, York, Ontario
- L3X 1M1 - Newmarket, York, Ontario
- L3X 1M2 - Newmarket, York, Ontario
- L3X 1M3 - Newmarket, York, Ontario
- L3X 1M4 - Newmarket, York, Ontario
- L3X 1M5 - Newmarket, York, Ontario
- L3X 1M6 - Newmarket, York, Ontario