Mahakalupahana Postal Code
| City | Postal Code | District |
|---|---|---|
| Utumgama | 12127 | Kalutara |
| Meegahatenna | 12130 | Kalutara |
| Walallawita | 12134 | Kalutara |
| Polgampola | 12136 | Kalutara |
| Pelawatta | 12138 | Kalutara |
| Boralugoda | 12142 | Kalutara |
| Pahalahewessa | 12144 | Kalutara |
| Pelawatta Tea Project | 12146 | Kalutara |
| Yattapatha Sinharaja Gardens | 12147 | Kalutara |
| Danawala Thiniyawala | 12148 | Kalutara |
| Agalawatta | 12200 | Kalutara |
| Veyangalla | 12204 | Kalutara |
| Mahagama | 12210 | Kalutara |
| Pelanda | 12214 | Kalutara |
| Molkawa | 12216 | Kalutara |