Bölge listesi
- L4P 1V7 - Keswick, York, Ontario
- L4P 1V8 - Keswick, York, Ontario
- L4P 1W1 - Keswick, York, Ontario
- L4P 1W2 - Keswick, York, Ontario
- L4P 1W5 - Keswick, York, Ontario
- L4P 1W7 - Keswick, York, Ontario
- L4P 1W8 - Keswick, York, Ontario
- L4P 1W9 - Keswick, York, Ontario
- L4P 1X1 - Keswick, York, Ontario
- L4P 1X2 - Keswick, York, Ontario
- L4P 1X3 - Keswick, York, Ontario
- L4P 1X4 - Keswick, York, Ontario
- L4P 1X5 - Keswick, York, Ontario
- L4P 1X6 - Keswick, York, Ontario
- L4P 1X7 - Keswick, York, Ontario
- L4P 1X8 - Keswick, York, Ontario
- L4P 1X9 - Keswick, York, Ontario
- L4P 1Y1 - Keswick, York, Ontario
- L4P 1Y2 - Keswick, York, Ontario
- L4P 1Y3 - Keswick, York, Ontario