| #SL | Post Office | Pincode |
|---|---|---|
| 1. | A.P.Colony S.O (Gaya) | 823001 |
| 2. | Adai B.O | 824207 |
| 3. | Adarchak B.O | 824221 |
| 4. | Agni B.O | 804403 |
| 5. | Ahiyapur B.O | 824207 |
| 6. | Aima Chouki B.O | 824233 |
| 7. | Aira B.O | 804421 |
| 8. | Akamba B.O | 824232 |
| 9. | Alipur B.O | 823003 |
| 10. | Amarut B.O | 824220 |
| 11. | Amas S.O | 824219 |
| 12. | Ambatari B.O | 824232 |
| 13. | Amethi B.O | 805131 |
| 14. | Amwan B.O | 824231 |
| 15. | Angara B.O | 824116 |
| 16. | Anjan B.O | 824217 |
| 17. | Anjanwan B.O | 824232 |
| 18. | Apgila B.O | 804423 |
| 19. | Arawan B.O | 805131 |
| 20. | Arkdhibariya B.O | 824236 |