The Area Codes of Indonesia:
| City/Town or Region | Area code |
| 1. | Balikpapan, North Penajam Paser | 0542 (+62542) |
| 2. | Banda Aceh, Aceh Besar | 0651 (+62651) |
| 3. | Banda Naira | 0910 (+62910) |
| 4. | Bandar Lampung | 0721 (+62721) |
| 5. | Bandung, Cimahi | 022 (+6222) |
| 6. | Banggai | 0461 (+62461) |
| 7. | Banggai Island | 0462 (+62462) |
| 8. | Bangka, Pangkal Pinang | 0717 (+62717) |
| 9. | Banjar, Ciamis, Tasikmalaya | 0265 (+62265) |
| 10. | Banjarmasin, Banjar, Banjarbaru, Barito Kuala | 0511 (+62511) |
| 11. | Banjarnegara, Wonosobo | 0286 (+62286) |
| 12. | Bantaeng, Bulukumba | 0413 (+62413) |
| 13. | Banyumas, Purbalingga | 0281 (+62281) |
| 14. | Banyuwangi | 0333 (+62333) |
| 15. | Barru | 0427 (+62427) |
| 16. | Batam | 0778 (+62778) |
| 17. | Batanghari | 0743 (+62743) |
| 18. | Bawean | 0325 (+62325) |
| 19. | Bekasi, Depok | 021 (+6221) |
| 20. | Belinyu | 0715 (+62715) |
| 21. | Belitung | 0719 (+62719) |
| 22. | Belu | 0389 (+62389) |
| 23. | Bengkalis | 0763 (+62763) |
| 24. | Bengkalis | 0766 (+62766) |
| 25. | Bengkulu, Seluma | 0736 (+62736) |
| 26. | Berau | 0554 (+62554) |
| 27. | Biak | 0981 (+62981) |
| 28. | Bima | 0374 (+62374) |
| 29. | Bireuen | 0644 (+62644) |
| 30. | Bitung | 0438 (+62438) |
| 31. | Blitar | 0342 (+62342) |
| 32. | Blora | 0296 (+62296) |
| 33. | Bogor city | 0251 (+62251) |
| 34. | Bojonegoro | 0353 (+62353) |
| 35. | Bolaang Mongondow | 0434 (+62434) |
| 36. | Bondowoso | 0332 (+62332) |
| 37. | Bone | 0481 (+62481) |
| 38. | Bontang | 0548 (+62548) |
| 39. | Botawa / Serui | 0983 (+62983) |
| 40. | Boyolali | 0276 (+62276) |
| 41. | Buleleng | 0362 (+62362) |
| 42. | Bulungan, Tana Tidung | 0552 (+62552) |
| 43. | Bumiayu | 0289 (+62289) |
| 44. | Bungo, Rimbo Bujang | 0747 (+62747) |
| 45. | Buton | 0402 (+62402) |