| Aimag, City | Zipcode | |
|---|---|---|
| Arhangai | 65000 | |
| Bayun-Ulgii | 83000 | |
| Bayunhongor | 64000 | |
| Bulgan | 63000 | |
| Govi-Altai | 82000 | |
| Govisymber | 42000 | |
| Drhan-Uul | 45000 | |
| Dornogovi | 44000 | |
| Dornod | 21000 | |
| Dundgovi | 48000 | |
| Zavhan | 81000 | |
| Orhon | 61000 | |
| Uvurhangai | 62000 | |
| Umnugovi | 46000 | |
| Syhbaatar | 22000 | |
| Selenge | 43000 | |
| Tuv aimag | 41000 | |
| Uvs | 85000 | |
| Ulan bator | 11000 | |
| Hovd | 84000 | |
| Huvsgul aimag | 67000 | |
| Hentii aimag | 23000 |
