Rajaun is Taluka (Tehsil) in Banka district of Bihar state. Rajaun has 8 areas (postal offices).
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 813105 | Harchandi PIN Code | Banka | Rajaun | Branch Office |
| 813107 | Kathoun PIN Code | Banka | Rajaun | Branch Office |
| 813105 | Kathrang PIN Code | Banka | Rajaun | Branch Office |
| 813109 | Lilotara PIN Code | Banka | Rajaun | Branch Office |
| 813109 | Manjhoui PIN Code | Banka | Rajaun | Branch Office |
| 813107 | Rojabar PIN Code | Banka | Rajaun | Branch Office |
| 813105 | Rupsa PIN Code | Banka | Rajaun | Branch Office |
| 813109 | Vijayhat PIN Code | Banka | Rajaun | Branch Office |