Список региона
- L4P 3C1 - Keswick, York, Ontario
- L4P 3C2 - Keswick, York, Ontario
- L4P 3C3 - Keswick, York, Ontario
- L4P 3C5 - Keswick, York, Ontario
- L4P 3C4 - Keswick, York, Ontario
- L4P 3C6 - Keswick, York, Ontario
- L4P 3C7 - Keswick, York, Ontario
- L4P 3C8 - Keswick, York, Ontario
- L4P 3C9 - Keswick, York, Ontario
- L4P 3E2 - Keswick, York, Ontario
- L4P 3E1 - Keswick, York, Ontario
- L4P 3E8 - Keswick, York, Ontario
- L4P 3G1 - Keswick, York, Ontario
- L4P 3E9 - Keswick, York, Ontario
- L4P 3G3 - Keswick, York, Ontario
- L4P 3G4 - Keswick, York, Ontario
- L4P 3G5 - Keswick, York, Ontario
- L4P 3G6 - Keswick, York, Ontario
- L4P 3G8 - Keswick, York, Ontario
- L4P 3G7 - Keswick, York, Ontario