The Area Codes of Indonesia:
| City/Town or Region | Area code |
| 1. | Madiun, Magetan, Ngawi | 0351 (+62351) |
| 2. | Magelang, Temanggung | 0293 (+62293) |
| 3. | Majalengka | 0233 (+62233) |
| 4. | Majene | 0422 (+62422) |
| 5. | Makassar, Maros, Gowa | 0411 (+62411) |
| 6. | Malang, Batu | 0341 (+62341) |
| 7. | Malinau | 0553 (+62553) |
| 8. | Malino | 0417 (+62417) |
| 9. | Mamuju | 0426 (+62426) |
| 10. | Manado, Tomohon, Minahasa, North Minahasa | 0431 (+62431) |
| 11. | Mandailing Natal | 0636 (+62636) |
| 12. | Manggarai | 0385 (+62385) |
| 13. | Manokwari | 0986 (+62986) |
| 14. | Masalembu Islands | 0326 (+62326) |
| 15. | Masohi | 0914 (+62914) |
| 16. | Mataram, West Lombok, Central Lombok | 0370 (+62370) |
| 17. | Medan, Binjai | 061 (+6261) |
| 18. | Melawi | 0568 (+62568) |
| 19. | Mentawai Islands | 0759 (+62759) |
| 20. | Merangin | 0746 (+62746) |
| 21. | Merauke | 0971 (+62971) |
| 22. | Metro, Central Lampung, East Lampung | 0725 (+62725) |
| 23. | Mojokerto. Jombang | 0321 (+62321) |
| 24. | Morowali | 0409 (+62409) |
| 25. | Muara Enim | 0734 (+62734) |
| 26. | Muna | 0403 (+62403) |
| 27. | Murung Raya | 0528 (+62528) |
| 28. | Musi Banyuasin | 0714 (+62714) |