PinCode: 524402, Karaballavolu Post Office, Vojili, Nellore, Andhra Pradesh
| Post Office | Karaballavolu |
| Post Office Status | Branch Post Office (Delivery) |
| PinCode | 524402
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| Telephone | |
| Town/Taluk | Vojili |
| District | Nellore |
| State | Andhra Pradesh |
| Postal Division | Gudur |
| Postal Region | Vijayawada |
| Postal Circle | Andhra Pradesh |
List of Other Post Offices in Vojili, Nellore, Andhra Pradesh