Kalamanallur B.O is the primary post office registered under PIN code 609301 in Mayiladuthurai, Tamil Nadu. This code sits within the Southern Postal Region, with 6 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Kalamanallur B.O | BO | Branch Post Office |
| Umayalpuram B.O | BO | Branch Post Office |
| Mamakudi B.O | BO | Branch Post Office |
| Akkur S.O (Nagapattinam) | OTHER | post office |
| Maruthampallam B.O | BO | Branch Post Office |
| Mathur B.O | BO | Branch Post Office |
