| Place | Post Code |
|---|---|
| Babhnauli, Tirhut) | 845455 |
| Babhni, Tirhut) | 845106 |
| Bahuari, Tirhut) | 845103, 845106 |
| Baikunthwa, Tirhut) | 845103 |
| Bairiya, Tirhut) | 845106 |
| Bairiya Farm, Tirhut) | 845437 |
| Bairiya Kalan, Tirhut) | 845105 |
| Bakhari Pachrukhia, Tirhut) | 845106 |
| Bakhraha, Tirhut) | 845106 |
| Bakwa, Tirhut) | 845106 |
| Balaura, Tirhut) | 845455 |
| Balia, Tirhut) | 845106 |
| Banarha, Tirhut) | 845106 |
| Banbari, Tirhut) | 845103, 845106 |
| Bankatwa, Tirhut) | 845106 |
| Bara Belwa, Tirhut) | 845103 |
| Bargajwa, Tirhut) | 845103 |
| Barganw, Tirhut) | 845103 |
| Bargo, Tirhut) | 845103, 845106 |
| Barwa, Tirhut) | 845106 |
| Barwa Banjariya, Tirhut) | 845103 |
| Barwa Dih, Tirhut) | 845106 |
| Beili, Tirhut) | 845106 |
| Belatandi, Tirhut) | 845106 |
| Belwa, Tirhut) | 845103 |
| Belwa Mokarari, Tirhut) | 845106 |
| Betahni, Tirhut) | 845106 |
| Bhawal, Tirhut) | 845106 |
| Bhulbhuliya, Tirhut) | 845106 |
| Bigri, Tirhut) | 845106 |