Birni is Taluka (Tehsil) in Giridh district of Jharkhand state. Birni has 12 areas (postal offices).
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 825324 | Bangrakala PIN Code | Giridh | Birni | Branch Office |
| 825324 | Dabri PIN Code | Giridh | Birni | Branch Office |
| 825324 | Gadi Bharkatha PIN Code | Giridh | Birni | Branch Office |
| 825324 | Gando PIN Code | Giridh | Birni | Branch Office |
| 825324 | Janata Jaridih PIN Code | Giridh | Birni | Branch Office |
| 825324 | Jawaharnagar PIN Code | Giridh | Birni | Branch Office |
| 825324 | Keshodih PIN Code | Giridh | Birni | Branch Office |
| 825324 | Khairidih PIN Code | Giridh | Birni | Branch Office |
| 825324 | Khurjio PIN Code | Giridh | Birni | Branch Office |
| 825324 | Manjhiladih PIN Code | Giridh | Birni | Branch Office |
| 825324 | Rupaidih PIN Code | Giridh | Birni | Branch Office |
| 825324 | Saranda PIN Code | Giridh | Birni | Branch Office |