| City | Code |
|---|---|
| Patna | BR01 |
| Gaya | BR02 |
| Bhojpur | BR03 |
| Chapra | BR04 |
| Motihari | BR05 |
| Muzaffarpur | BR06 |
| Darbhanga | BR07 |
| Munger | BR08 |
| Begusarai | BR09 |
| Bhagalpur | BR10 |
| Purnea | BR11 |
| Saharsa | BR19 |
| Nalanda | BR21 |
| Bettiah | BR22 |
| Dehri | BR24 |
| Aurangabad | BR26 |
| Jehanabad | BR25 |
| Nawada | BR27 |
| Gopalganj | BR28 |
| Siwan | BR29 |
| Sitamarhi | BR30 |
| Vaishali | BR31 |
| Madhubani | BR32 |
| Samastipur | BR33 |
| Khagaria | BR34 |
| Kishanganj | BR37 |
| Araria | BR38 |
| Katihar | BR39 |
| Madhepura | BR43 |
| Buxar | BR44 |
| Bhabua | BR45 |
| Jamui | BR46 |
| Supaul | BR50 |
| Banka | BR51 |
| Sheikhpura | BR52 |
| Lakhisarai | BR53 |
| Sheohar | BR55 |
| Arwal | BR56 |
| Rohtas | BR57 |