| Office Name | Ayer B.O |
| Pincodes | 823311 |
| Area | Ayer |
| Office Status | Branch Post Office |
| Postal Circle | Bihar |
| Postal Division | Gaya |
| Postal Region | Patna Hq |
| District | Gaya |
| State | Bihar |
| Telephone No. | Na |
| Office Name | Ayer S.O |
| Pincodes | 805135 |
| Area | Ayer |
| Office Status | Sub Post Office |
| Postal Circle | Bihar |
| Postal Division | Gaya |
| Postal Region | Patna Hq |
| District | Gaya |
| State | Bihar |
| Telephone No. | 0631-111111 |