Region List
- L1B 1E5 - Newcastle, Durham, Ontario
- L1B 1E6 - Newcastle, Durham, Ontario
- L1B 1E7 - Newcastle, Durham, Ontario
- L1B 1E8 - Newcastle, Durham, Ontario
- L1B 1E9 - Newcastle, Durham, Ontario
- L1B 1G1 - Newcastle, Durham, Ontario
- L1B 1G2 - Newcastle, Durham, Ontario
- L1B 1G3 - Newcastle, Durham, Ontario
- L1B 1G5 - Newcastle, Durham, Ontario
- L1B 1G6 - Newcastle, Durham, Ontario
- L1B 1G4 - Newcastle, Durham, Ontario
- L1B 1G7 - Newcastle, Durham, Ontario
- L1B 1G8 - Newcastle, Durham, Ontario
- L1B 1G9 - Newcastle, Durham, Ontario
- L1B 1H1 - Newcastle, Durham, Ontario
- L1B 1H2 - Newcastle, Durham, Ontario
- L1B 1H3 - Newcastle, Durham, Ontario
- L1B 1H4 - Newcastle, Durham, Ontario
- L1B 1H5 - Newcastle, Durham, Ontario
- L1B 1H6 - Newcastle, Durham, Ontario