Liste de la région
- L3K 0A1 - Port Colborne, Niagara, Ontario
- L3K 0A2 - Port Colborne, Niagara, Ontario
- L3K 1A2 - Port Colborne, Niagara, Ontario
- L3K 1A3 - Port Colborne, Niagara, Ontario
- L3K 1A4 - Port Colborne, Niagara, Ontario
- L3K 1A5 - Port Colborne, Niagara, Ontario
- L3K 1A6 - Port Colborne, Niagara, Ontario
- L3K 1A7 - Port Colborne, Niagara, Ontario
- L3K 1A8 - Port Colborne, Niagara, Ontario
- L3K 1A9 - Port Colborne, Niagara, Ontario
- L3K 1B1 - Port Colborne, Niagara, Ontario
- L3K 1B2 - Port Colborne, Niagara, Ontario
- L3K 1B3 - Port Colborne, Niagara, Ontario
- L3K 1B4 - Port Colborne, Niagara, Ontario
- L3K 1B5 - Port Colborne, Niagara, Ontario
- L3K 1B7 - Port Colborne, Niagara, Ontario
- L3K 1B8 - Port Colborne, Niagara, Ontario
- L3K 1B9 - Port Colborne, Niagara, Ontario
- L3K 1C1 - Port Colborne, Niagara, Ontario
- L3K 1C2 - Port Colborne, Niagara, Ontario