Lista de la región
- N7S 3S8 - Sarnia, Lambton, Ontario
- N7S 3S9 - Sarnia, Lambton, Ontario
- N7S 3T1 - Sarnia, Lambton, Ontario
- N7S 3T2 - Sarnia, Lambton, Ontario
- N7S 3T3 - Sarnia, Lambton, Ontario
- N7S 3T4 - Sarnia, Lambton, Ontario
- N7S 3T5 - Sarnia, Lambton, Ontario
- N7S 3T6 - Sarnia, Lambton, Ontario
- N7S 3T7 - Sarnia, Lambton, Ontario
- N7S 3T8 - Sarnia, Lambton, Ontario
- N7S 3T9 - Sarnia, Lambton, Ontario
- N7S 3V1 - Sarnia, Lambton, Ontario
- N7S 3V2 - Sarnia, Lambton, Ontario
- N7S 3V3 - Sarnia, Lambton, Ontario
- N7S 3V4 - Sarnia, Lambton, Ontario
- N7S 3V5 - Sarnia, Lambton, Ontario
- N7S 3V6 - Sarnia, Lambton, Ontario
- N7S 3V7 - Sarnia, Lambton, Ontario
- N7S 3V8 - Sarnia, Lambton, Ontario
- N7S 3W1 - Sarnia, Lambton, Ontario