Chakki is Taluka (Tehsil) in Buxar district of Bihar state. Chakki has 6 areas (postal offices).
| Pin code | Area | District | Taluka | Postal Status |
|---|---|---|---|---|
| 802111 | Diaman PIN Code | Buxar | Chakki | Branch Office |
| 802111 | Jogia PIN Code | Buxar | Chakki | Branch Office |
| 802111 | Kathar PIN Code | Buxar | Chakki | Branch Office |
| 802111 | Nuaon PIN Code | Buxar | Chakki | Branch Office |
| 802111 | Parasia PIN Code | Buxar | Chakki | Branch Office |
| 802111 | Sowan PIN Code | Buxar | Chakki | Branch Office |