| Place | Post Code |
|---|---|
| Tshalumthang, Gangtok | 737113 |
| Tumen Forest Block, Gangtok | 737134, 737138 |
| Tumin, Gangtok | 737134 |
| Tumlabung, Gangtok | 737135 |
| Upper Burtuk, Gangtok | 737101 |
| Upper Chandmari, Gangtok | 737103 |
| Upper Sicheygaon, Gangtok | 737101 |
| Upper Tathangchen, Gangtok | 737103 |
| West Pendam, Gangtok | 737134 |
| All postal codes in East Sikkim | |
|---|---|
| Gangtok, East Sikkim | |
| Pakyong, East Sikkim | |
| Rongli, East Sikkim | |