Tharthari is Taluka (Tehsil) in Nalanda district of Bihar state. Tharthari has 9 areas (postal offices).
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 803120 | Asta PIN Code | Nalanda | Tharthari | Sub Office |
| 801307 | Bhathar PIN Code | Nalanda | Tharthari | Sub Office |
| 801307 | Chhariari Bujurg PIN Code | Nalanda | Tharthari | Branch Office |
| 803120 | Choti Chariari PIN Code | Nalanda | Tharthari | Branch Office |
| 803120 | Diha PIN Code | Nalanda | Tharthari | Branch Office |
| 801307 | Jaitpur PIN Code | Nalanda | Tharthari | Branch Office |
| 803120 | Narari PIN Code | Nalanda | Tharthari | Branch Office |
| 803120 | Pratappur PIN Code | Nalanda | Tharthari | Branch Office |
| 803120 | Raipur Koil Bigha PIN Code | Nalanda | Tharthari | Branch Office |