Lista de la región
- N7S 3W2 - Sarnia, Lambton, Ontario
- N7S 3W3 - Sarnia, Lambton, Ontario
- N7S 3W4 - Sarnia, Lambton, Ontario
- N7S 3W5 - Sarnia, Lambton, Ontario
- N7S 3W6 - Sarnia, Lambton, Ontario
- N7S 3W7 - Sarnia, Lambton, Ontario
- N7S 3W8 - Sarnia, Lambton, Ontario
- N7S 3W9 - Sarnia, Lambton, Ontario
- N7S 3X1 - Sarnia, Lambton, Ontario
- N7S 3X2 - Sarnia, Lambton, Ontario
- N7S 3X3 - Sarnia, Lambton, Ontario
- N7S 3X4 - Sarnia, Lambton, Ontario
- N7S 3X5 - Sarnia, Lambton, Ontario
- N7S 3X6 - Sarnia, Lambton, Ontario
- N7S 3X7 - Sarnia, Lambton, Ontario
- N7S 3X8 - Sarnia, Lambton, Ontario
- N7S 3X9 - Sarnia, Lambton, Ontario
- N7S 3Y1 - Sarnia, Lambton, Ontario
- N7S 3Y2 - Sarnia, Lambton, Ontario
- N7S 3Y3 - Sarnia, Lambton, Ontario