Liste de la région
- L3B 0A1 - Welland, Niagara, Ontario
- L3B 0A3 - Welland, Niagara, Ontario
- L3B 0A2 - Welland, Niagara, Ontario
- L3B 0A4 - Welland, Niagara, Ontario
- L3B 0A5 - Welland, Niagara, Ontario
- L3B 0A6 - Welland, Niagara, Ontario
- L3B 0A7 - Welland, Niagara, Ontario
- L3B 0A8 - Welland, Niagara, Ontario
- L3B 0A9 - Welland, Niagara, Ontario
- L3B 1A1 - Welland, Niagara, Ontario
- L3B 1A2 - Welland, Niagara, Ontario
- L3B 1A3 - Welland, Niagara, Ontario
- L3B 1A4 - Welland, Niagara, Ontario
- L3B 1A5 - Welland, Niagara, Ontario
- L3B 1A6 - Welland, Niagara, Ontario
- L3B 1A7 - Welland, Niagara, Ontario
- L3B 1A8 - Welland, Niagara, Ontario
- L3B 1A9 - Welland, Niagara, Ontario
- L3B 1B1 - Welland, Niagara, Ontario
- L3B 1B2 - Welland, Niagara, Ontario