PIN code 603306 belongs to Thatchur BO (Branch Post Office), located in Chengalpattu district, Tamil Nadu. It falls under the Southern Postal Region and is served by 11 post offices in total.
| Post office | Type | Full name |
|---|---|---|
| Thatchur BO | BO | Branch Post Office |
| Pakkam BO | BO | Branch Post Office |
| Perumbakkam BO | BO | Branch Post Office |
| Madurantakam SO | SO | Sub Post Office |
| Senguntharpettai SO | SO | Sub Post Office |
| Arungunam BO | BO | Branch Post Office |
| Morapakkam BO | BO | Branch Post Office |
| Murugambakkam BO | BO | Branch Post Office |
| Veeranakunnam BO | BO | Branch Post Office |
| New Mambakkam BO | BO | Branch Post Office |
| Unamalai BO | BO | Branch Post Office |
