Region List
- N7S 1J4 - Sarnia, Lambton, Ontario
- N7S 1J5 - Sarnia, Lambton, Ontario
- N7S 1J6 - Sarnia, Lambton, Ontario
- N7S 1J7 - Sarnia, Lambton, Ontario
- N7S 1J8 - Sarnia, Lambton, Ontario
- N7S 1J9 - Sarnia, Lambton, Ontario
- N7S 1K1 - Sarnia, Lambton, Ontario
- N7S 1K2 - Sarnia, Lambton, Ontario
- N7S 1K3 - Sarnia, Lambton, Ontario
- N7S 1K4 - Sarnia, Lambton, Ontario
- N7S 1K5 - Sarnia, Lambton, Ontario
- N7S 1K6 - Sarnia, Lambton, Ontario
- N7S 1K7 - Sarnia, Lambton, Ontario
- N7S 1K8 - Sarnia, Lambton, Ontario
- N7S 1K9 - Sarnia, Lambton, Ontario
- N7S 1L1 - Sarnia, Lambton, Ontario
- N7S 1L2 - Sarnia, Lambton, Ontario
- N7S 1L3 - Sarnia, Lambton, Ontario
- N7S 1L4 - Sarnia, Lambton, Ontario
- N7S 1L5 - Sarnia, Lambton, Ontario