Danh sách vùng
- L4P 3W4 - Keswick, York, Ontario
- L4P 3W5 - Keswick, York, Ontario
- L4P 3W7 - Keswick, York, Ontario
- L4P 3W8 - Keswick, York, Ontario
- L4P 3W9 - Keswick, York, Ontario
- L4P 3X1 - Keswick, York, Ontario
- L4P 3X2 - Keswick, York, Ontario
- L4P 3X3 - Keswick, York, Ontario
- L4P 3X4 - Keswick, York, Ontario
- L4P 3X5 - Keswick, York, Ontario
- L4P 3X6 - Keswick, York, Ontario
- L4P 3X7 - Keswick, York, Ontario
- L4P 3X8 - Keswick, York, Ontario
- L4P 3X9 - Keswick, York, Ontario
- L4P 3Y1 - Keswick, York, Ontario
- L4P 3Y2 - Keswick, York, Ontario
- L4P 3Y3 - Keswick, York, Ontario
- L4P 3Y4 - Keswick, York, Ontario
- L4P 3Y5 - Keswick, York, Ontario
- L4P 3Y6 - Keswick, York, Ontario