Pincode 603313 · Chengalpattu District · Tamil Nadu
| Name | Onambakkam BO |
| Type | Branch Post Office |
| Pincode | 603313 |
| Taluk | Chengalpattu Division |
| District | |
| State | |
| Coordinates | 12.3487, 80.0031 |
| Post Office | Type |
|---|---|
| Post Office | |
| Branch Post Office | |
| Branch Post Office |
Chengalpattu, Tamil Nadu. Map data: OpenStreetMap, CARTO.
| Nugumbal BO | Branch Post Office |
| Vilanganur BO | Branch Post Office |