Lista de la región
- N7S 3M1 - Sarnia, Lambton, Ontario
- N7S 3M2 - Sarnia, Lambton, Ontario
- N7S 3M3 - Sarnia, Lambton, Ontario
- N7S 3M4 - Sarnia, Lambton, Ontario
- N7S 3M5 - Sarnia, Lambton, Ontario
- N7S 3M6 - Sarnia, Lambton, Ontario
- N7S 3M7 - Sarnia, Lambton, Ontario
- N7S 3M8 - Sarnia, Lambton, Ontario
- N7S 3M9 - Sarnia, Lambton, Ontario
- N7S 3N1 - Sarnia, Lambton, Ontario
- N7S 3N2 - Sarnia, Lambton, Ontario
- N7S 3N3 - Sarnia, Lambton, Ontario
- N7S 3N4 - Sarnia, Lambton, Ontario
- N7S 3N5 - Sarnia, Lambton, Ontario
- N7S 3N6 - Sarnia, Lambton, Ontario
- N7S 3N7 - Sarnia, Lambton, Ontario
- N7S 3N8 - Sarnia, Lambton, Ontario
- N7S 3N9 - Sarnia, Lambton, Ontario
- N7S 3P1 - Sarnia, Lambton, Ontario
- N7S 3P2 - Sarnia, Lambton, Ontario