Lista de la región
- L1G 1C1 - Oshawa, Durham, Ontario
- L1G 1C2 - Oshawa, Durham, Ontario
- L1G 1C3 - Oshawa, Durham, Ontario
- L1G 1C4 - Oshawa, Durham, Ontario
- L1G 1C5 - Oshawa, Durham, Ontario
- L1G 1C6 - Oshawa, Durham, Ontario
- L1G 1C7 - Oshawa, Durham, Ontario
- L1G 1C9 - Oshawa, Durham, Ontario
- L1G 1E1 - Oshawa, Durham, Ontario
- L1G 1E3 - Oshawa, Durham, Ontario
- L1G 1E5 - Oshawa, Durham, Ontario
- L1G 1E6 - Oshawa, Durham, Ontario
- L1G 1E7 - Oshawa, Durham, Ontario
- L1G 1E8 - Oshawa, Durham, Ontario
- L1G 1E9 - Oshawa, Durham, Ontario
- L1G 1G1 - Oshawa, Durham, Ontario
- L1G 1G2 - Oshawa, Durham, Ontario
- L1G 1G3 - Oshawa, Durham, Ontario
- L1G 1G4 - Oshawa, Durham, Ontario
- L1G 1G5 - Oshawa, Durham, Ontario