Lista regionu
- L4P 0A1 - Keswick, York, Ontario
- L4P 0A2 - Keswick, York, Ontario
- L4P 0A3 - Keswick, York, Ontario
- L4P 0A4 - Keswick, York, Ontario
- L4P 0A5 - Keswick, York, Ontario
- L4P 0A6 - Keswick, York, Ontario
- L4P 0A7 - Keswick, York, Ontario
- L4P 0A8 - Keswick, York, Ontario
- L4P 0A9 - Keswick, York, Ontario
- L4P 0B1 - Keswick, York, Ontario
- L4P 0B2 - Keswick, York, Ontario
- L4P 0B3 - Keswick, York, Ontario
- L4P 0B4 - Keswick, York, Ontario
- L4P 0B5 - Keswick, York, Ontario
- L4P 0B6 - Keswick, York, Ontario
- L4P 0B7 - Keswick, York, Ontario
- L4P 0B8 - Keswick, York, Ontario
- L4P 0B9 - Keswick, York, Ontario
- L4P 0C2 - Keswick, York, Ontario
- L4P 0C3 - Keswick, York, Ontario