Region List
- N7S 3J8 - Sarnia, Lambton, Ontario
- N7S 3J9 - Sarnia, Lambton, Ontario
- N7S 3K1 - Sarnia, Lambton, Ontario
- N7S 3K2 - Sarnia, Lambton, Ontario
- N7S 3K3 - Sarnia, Lambton, Ontario
- N7S 3K4 - Sarnia, Lambton, Ontario
- N7S 3K5 - Sarnia, Lambton, Ontario
- N7S 3K6 - Sarnia, Lambton, Ontario
- N7S 3K7 - Sarnia, Lambton, Ontario
- N7S 3K8 - Sarnia, Lambton, Ontario
- N7S 3K9 - Sarnia, Lambton, Ontario
- N7S 3L1 - Sarnia, Lambton, Ontario
- N7S 3L2 - Sarnia, Lambton, Ontario
- N7S 3L3 - Sarnia, Lambton, Ontario
- N7S 3L4 - Sarnia, Lambton, Ontario
- N7S 3L5 - Sarnia, Lambton, Ontario
- N7S 3L6 - Sarnia, Lambton, Ontario
- N7S 3L7 - Sarnia, Lambton, Ontario
- N7S 3L8 - Sarnia, Lambton, Ontario
- N7S 3L9 - Sarnia, Lambton, Ontario