Lista de la región
- N7S 3Y4 - Sarnia, Lambton, Ontario
- N7S 3Y5 - Sarnia, Lambton, Ontario
- N7S 3Y6 - Sarnia, Lambton, Ontario
- N7S 3Y7 - Sarnia, Lambton, Ontario
- N7S 3Y8 - Sarnia, Lambton, Ontario
- N7S 3Y9 - Sarnia, Lambton, Ontario
- N7S 3Z1 - Sarnia, Lambton, Ontario
- N7S 3Z2 - Sarnia, Lambton, Ontario
- N7S 3Z3 - Sarnia, Lambton, Ontario
- N7S 3Z4 - Sarnia, Lambton, Ontario
- N7S 3Z5 - Sarnia, Lambton, Ontario
- N7S 3Z6 - Sarnia, Lambton, Ontario
- N7S 3Z7 - Sarnia, Lambton, Ontario
- N7S 3Z8 - Sarnia, Lambton, Ontario
- N7S 3Z9 - Sarnia, Lambton, Ontario
- N7S 4A1 - Sarnia, Lambton, Ontario
- N7S 4A2 - Sarnia, Lambton, Ontario
- N7S 4A3 - Sarnia, Lambton, Ontario
- N7S 4A4 - Sarnia, Lambton, Ontario
- N7S 4A5 - Sarnia, Lambton, Ontario