| City |
Postal Code |
| Akarawita |
10732 |
| Athurugiriya |
10150 |
| Avissawella |
10700 |
| Batawala |
10513 |
| Battaramulla |
10120 |
| Batugampola |
10526 |
| Bope |
10522 |
| Boralesgamuwa |
10290 |
| Colombo 01 (Fort) |
00100 |
| Colombo 02 (Slave Island) |
00200 |
| Colombo 03 (Kollupitiya) |
00300 |
| Colombo 04 (Bambalapitiya) |
00400 |
| Colombo 05 (Havelock Town, Kirulapone) |
00500 |
| Colombo 06 (Wellawatte, Pamankada, Kirulapone) |
00600 |
| Colombo 07 (Cinnamon Gardens) |
00700 |
| Colombo 08 (Borella) |
00800 |
| Colombo 09 (Dematagoda, Maradana) |
00900 |
| Colombo 10 (Panchikawatte) |
01000 |
| Colombo 11 (Pettah) |
01100 |
| Colombo 12 (Hulftsdorp) |
01200 |
| Colombo 13 (Kotahena, Kochchika) |
01300 |
| Colombo 14 (Grandpass) |
01400 |
| Colombo 15 (Mutwal, Modara, Mattakuliya, Madampitiya) |
01500 |
| Dedigamuwa |
10656 |
| Dehiwala |
10350 |
| Deltara |
10302 |
| Habarakada |
10204 |
| Handapangoda |
10524 |
| Hanwella |
10650 |
| Hewainna |
10714 |
| Hiripitya |
10232 |
| Hokandara |
10118 |
| Homagama |
10200 |
| Horagala |
10502 |
| Kaduwela |
10640 |
| Kahawala |
10508 |
| Kalatuwawa |
10718 |
| Kiriwattuduwa |
10208 |
| Kolonnawa |
10600 |
| Kosgama |
10730 |
| Madapatha |
10306 |
| Maharagama |
10280 |
| Malabe |
10115 |
| Meegoda |
10504 |
| Moratuwa |
10400 |
| Mount Lavinia |
10370 |
| Mullegama |
10202 |
| Mulleriyawa New Town |
10620 |
| Mutwal |
01500 |
| Napawela |
10704 |
| Nugegoda |
10250 |
| Padukka |
10500 |
| Pannipitiya |
10230 |
| Piliyandala |
10300 |
| Pitipana Homagama |
10206 |
| Polgasowita |
10320 |
| Puwakpitiya |
10712 |
| Ranala |
10654 |
| Siddamulla |
10304 |
| Sri Jayawardenepu |
10100 |
| Talawatugoda |
10116 |
| Tummodara |
10682 |
| Waga |
10680 |
| Watareka |
10511 |