Danh sách vùng
- L4P 3S9 - Keswick, York, Ontario
- L4P 3T1 - Keswick, York, Ontario
- L4P 3T2 - Keswick, York, Ontario
- L4P 3T3 - Keswick, York, Ontario
- L4P 3T4 - Keswick, York, Ontario
- L4P 3T5 - Keswick, York, Ontario
- L4P 3T6 - Keswick, York, Ontario
- L4P 3T7 - Keswick, York, Ontario
- L4P 3T8 - Keswick, York, Ontario
- L4P 3T9 - Keswick, York, Ontario
- L4P 3V1 - Keswick, York, Ontario
- L4P 3V2 - Keswick, York, Ontario
- L4P 3V4 - Keswick, York, Ontario
- L4P 3V5 - Keswick, York, Ontario
- L4P 3V6 - Keswick, York, Ontario
- L4P 3V7 - Keswick, York, Ontario
- L4P 3V8 - Keswick, York, Ontario
- L4P 3V9 - Keswick, York, Ontario
- L4P 3W1 - Keswick, York, Ontario
- L4P 3W2 - Keswick, York, Ontario