รายชื่อภูมิภาค
- L1B 0C3 - Newcastle, Durham, Ontario
- L1B 0C4 - Newcastle, Durham, Ontario
- L1B 0C5 - Newcastle, Durham, Ontario
- L1B 0C6 - Newcastle, Durham, Ontario
- L1B 0C7 - Newcastle, Durham, Ontario
- L1B 0C8 - Newcastle, Durham, Ontario
- L1B 0C9 - Newcastle, Durham, Ontario
- L1B 0E1 - Newcastle, Durham, Ontario
- L1B 0E2 - Newcastle, Durham, Ontario
- L1B 1A1 - Newcastle, Durham, Ontario
- L1B 1A2 - Newcastle, Durham, Ontario
- L1B 1A3 - Newcastle, Durham, Ontario
- L1B 1A4 - Newcastle, Durham, Ontario
- L1B 1A5 - Newcastle, Durham, Ontario
- L1B 1A6 - Newcastle, Durham, Ontario
- L1B 1A7 - Newcastle, Durham, Ontario
- L1B 1A8 - Newcastle, Durham, Ontario
- L1B 1A9 - Newcastle, Durham, Ontario
- L1B 1B1 - Newcastle, Durham, Ontario
- L1B 1B2 - Newcastle, Durham, Ontario