| Postal Code | Locality / District | Administrative Area | Coordinates |
|---|---|---|---|
| Bayantal | Bayantal Sum District · Govĭ-Sumber | 46.56221, 108.30439 | |
| Bayantal Sum | Bayantal Sum District · Govĭ-Sumber | 46.68818, 108.31709 | |
| Shiveegovĭ | Shiveegovi Sum · Govĭ-Sumber | 46.10558, 108.62061 | |
| Choyr | Shiveegovi Sum · Govĭ-Sumber | 46.13333, 108.65 | |
| Choyr | Sümber Sum · Govĭ-Sumber | 46.36111, 108.36111 | |
| Sümber Horshoo | Sümber Sum · Govĭ-Sumber | 46.68333, 108.95 | |
| Habtsal Hiid | Sümber Sum · Govĭ-Sumber | 46.6, 108.95 | |
| Eligen Deese | Sümber Sum · Govĭ-Sumber | 46.85, 109.05 | |
| Bayan Bulagiin Suurin | Sümber Sum · Govĭ-Sumber | 46.66667, 108.91667 | |
| Agatayn Hiid | Sümber Sum · Govĭ-Sumber | 46.58333, 108.61667 |
Postal code prefix 21 in Mongolia covers 9 localities (primarily in Govĭ-Sumber, including Bayantal), spanning from 210000 to 210205.
There are 10 active postal codes starting with 21 in Mongolia. Use the interactive directory table above to filter by locality or copy any code in one click.