Region List
- N7S 1Z9 - Sarnia, Lambton, Ontario
- N7S 2A1 - Sarnia, Lambton, Ontario
- N7S 2A2 - Sarnia, Lambton, Ontario
- N7S 2A3 - Sarnia, Lambton, Ontario
- N7S 2A4 - Sarnia, Lambton, Ontario
- N7S 2A5 - Sarnia, Lambton, Ontario
- N7S 2A6 - Sarnia, Lambton, Ontario
- N7S 2A7 - Sarnia, Lambton, Ontario
- N7S 2A8 - Sarnia, Lambton, Ontario
- N7S 2A9 - Sarnia, Lambton, Ontario
- N7S 2B1 - Sarnia, Lambton, Ontario
- N7S 2B2 - Sarnia, Lambton, Ontario
- N7S 2B3 - Sarnia, Lambton, Ontario
- N7S 2B4 - Sarnia, Lambton, Ontario
- N7S 2B5 - Sarnia, Lambton, Ontario
- N7S 2B6 - Sarnia, Lambton, Ontario
- N7S 2B7 - Sarnia, Lambton, Ontario
- N7S 2B8 - Sarnia, Lambton, Ontario
- N7S 2B9 - Sarnia, Lambton, Ontario
- N7S 2C1 - Sarnia, Lambton, Ontario