Lista de la región
- L1B 1B3 - Newcastle, Durham, Ontario
- L1B 1B4 - Newcastle, Durham, Ontario
- L1B 1B5 - Newcastle, Durham, Ontario
- L1B 1B6 - Newcastle, Durham, Ontario
- L1B 1B7 - Newcastle, Durham, Ontario
- L1B 1B8 - Newcastle, Durham, Ontario
- L1B 1B9 - Newcastle, Durham, Ontario
- L1B 1C1 - Newcastle, Durham, Ontario
- L1B 1C2 - Newcastle, Durham, Ontario
- L1B 1C3 - Newcastle, Durham, Ontario
- L1B 1C4 - Newcastle, Durham, Ontario
- L1B 1C5 - Newcastle, Durham, Ontario
- L1B 1C6 - Newcastle, Durham, Ontario
- L1B 1C7 - Newcastle, Durham, Ontario
- L1B 1C8 - Newcastle, Durham, Ontario
- L1B 1C9 - Newcastle, Durham, Ontario
- L1B 1E1 - Newcastle, Durham, Ontario
- L1B 1E2 - Newcastle, Durham, Ontario
- L1B 1E3 - Newcastle, Durham, Ontario
- L1B 1E4 - Newcastle, Durham, Ontario