Ammanambakkam BO is the primary post office registered under PIN code 603004 in Chengalpattu, Tamil Nadu. This code sits within the Southern Postal Region, with 2 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Ammanambakkam BO | BO | Branch Post Office |
| Mahindra World City SO Kanchipuram | OTHER | post office |
