The Area Codes of Mongolia:
| City/Town or Region | Area code | |
|---|---|---|
| 1. | Khairkhan | 3351 |
| 2. | Khairkhandulaan | 3257 |
| 3. | Khalhgol | 5849 |
| 4. | Khaliun | 4852 |
| 5. | Khan khongor | 5352 |
| 6. | Khanbogd | 5351 |
| 7. | Khangai | 3352 |
| 8. | Khangal | 3454 |
| 9. | Khankh | 3856 |
| 10. | Kharkhorin | 3258 |
| 11. | Khashaat | 3353 |
| 12. | Khatanbulag | 5252 |
| 13. | Khatgal | 3857 |
| 14. | Khishig-Öndör | 3455 |
| 15. | Khökh morit | 4853 |
| 16. | Khölönbuir | 5851 |
| 17. | Khongor (Salkhit) | 3742 |
| 18. | Khotont | 3354 |
| 19. | Khovd | 4557 |
| 20. | Khovd city (Jargalant sum) | 432 |
| 21. | Khovd sum | 4354 |
| 22. | Khövsgöl | 5253 |
| 23. | Khüder | 3654 |
| 24. | Khujirt | 3259 |
| 25. | Khuld | 5953 |
| 26. | Khüreemaral | 4458 |
| 27. | Khürmen | 5353 |
| 28. | Khushaat | 3655 |
| 29. | Khutag-Öndör | 3456 |
| 30. | Khyargas | 4558 |