Region List
- L1B 1K9 - Newcastle, Durham, Ontario
- L1B 1L1 - Newcastle, Durham, Ontario
- L1B 1L2 - Newcastle, Durham, Ontario
- L1B 1L3 - Newcastle, Durham, Ontario
- L1B 1L4 - Newcastle, Durham, Ontario
- L1B 1L5 - Newcastle, Durham, Ontario
- L1B 1L6 - Newcastle, Durham, Ontario
- L1B 1L7 - Newcastle, Durham, Ontario
- L1B 1L8 - Newcastle, Durham, Ontario
- L1B 1L9 - Newcastle, Durham, Ontario
- L1B 1M3 - Newcastle, Durham, Ontario
- L1B 1M4 - Newcastle, Durham, Ontario
- L1B 1M5 - Newcastle, Durham, Ontario
- L1B 1M6 - Newcastle, Durham, Ontario
- L1B 1M7 - Newcastle, Durham, Ontario
- L1B 1M8 - Newcastle, Durham, Ontario
- L1B 1M9 - Newcastle, Durham, Ontario
- L1B 1N1 - Newcastle, Durham, Ontario
- L1B 1N2 - Newcastle, Durham, Ontario
- L1B 1N3 - Newcastle, Durham, Ontario