Sri Lanka Colombo District Postal Codes
| Akarawita | CO | 10732 | | Hanwella | CO | 10650 | | Pannipitiya | CO | 10230 |
| Angamuwa | CO | 10150 | | Hewainna | CO | 10714 | | Piliyandala | CO | 10300 |
| Avissawella | CO | 10700 | | Hiripitya | CO | 10232 | | Pitipana Homagama | CO | 10206 |
| Batawala | CO | 10513 | | Hokandara | CO | 10118 | | Polgasowita | CO | 10320 |
| Battaramulla | CO | 10120 | | Homagama | CO | 10200 | | Puwakpitiya | CO | 10712 |
| Batugampola | CO | 10526 | | Horagala | CO | 10502 | | Ranala | CO | 10654 |
| Bope | CO | 10522 | | Kaduwela | CO | 10640 | | Siddamulla | CO | 10304 |
| Boralesgamuwa | CO | 10290 | | Kahawala | CO | 10508 | | Slave Island | CO | 00200 |
| Borella | CO | 800 | | Kalatuwawa | CO | 10718 | | Sri Jayawardenapura | CO | 10100 |
| Dedigamuwa | CO | 10656 | | Madapatha | CO | 10306 | | Talawatugoda | CO | 10116 |
| Dehiwala | CO | 10350 | | Maharagama | CO | 10280 | | Tummodara | CO | 10682 |
| Deltara | CO | 10302 | | Malabe | CO | 10115 | | Waga | CO | 10680 |
| Habarakada | CO | 10204 | | Meegoda | CO | 10504 | | Watareka | CO | 10511 |
| Handapangoda | CO | 10524 | | Padukka | CO | 10500 |
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