There are 6 post offices under PIN code 632311.
| Post Office | Office Type | Delivery Status | Taluk | District | Division | Region | State | Circle | |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Kalasamudram B.O | Branch Office | Delivery | Arni | Tiruvannamalai | Tiruvannamalai | Chennai Region | Tamil Nadu | Tamilnadu |
| 2 | Kannamangalam Bazaar B.O | Branch Office | Non-Delivery | Arani | Tiruvannamalai | Tiruvannamalai | Chennai Region | Tamil Nadu | Tamilnadu |
| 3 | Kannamangalam S.O | Sub Office | Delivery | Arni | Tiruvannamalai | Tiruvannamalai | Chennai Region | Tamil Nadu | Tamilnadu |
| 4 | Kulathur B.O | Branch Office | Delivery | Arni | Tiruvannamalai | Tiruvannamalai | Chennai Region | Tamil Nadu | Tamilnadu |
| 5 | Kuppam B.O | Branch Office | Delivery | Arni | Tiruvannamalai | Tiruvannamalai | Chennai Region | Tamil Nadu | Tamilnadu |
| 6 | Vallam Kannamangalam B.O | Branch Office | Delivery | Arni | Vellore | Tiruvannamalai | Chennai Region | Tamil Nadu | Tamilnadu |