Region List
- L6E 1X3 - Markham, York, Ontario
- L6E 1X4 - Markham, York, Ontario
- L6E 1X5 - Markham, York, Ontario
- L6E 1X6 - Markham, York, Ontario
- L6E 1X7 - Markham, York, Ontario
- L6E 1X8 - Markham, York, Ontario
- L6E 1X9 - Markham, York, Ontario
- L6E 1Y1 - Markham, York, Ontario
- L6E 1Y2 - Markham, York, Ontario
- L6E 1Y3 - Markham, York, Ontario
- L6E 1Y4 - Markham, York, Ontario
- L6E 1Y5 - Markham, York, Ontario
- L6E 1Y6 - Markham, York, Ontario
- L6E 1Y7 - Markham, York, Ontario
- L6E 1Y8 - Markham, York, Ontario
- L6E 1Y9 - Markham, York, Ontario
- L6E 1Z1 - Markham, York, Ontario
- L6E 1Z2 - Markham, York, Ontario
- L6E 1Z5 - Markham, York, Ontario
- L6E 1Z6 - Markham, York, Ontario