Kottaiyur B.O is the primary post office registered under PIN code 621001 in Tiruchirappalli, Tamil Nadu. This code sits within the Southern Postal Region, with 9 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Kottaiyur B.O | BO | Branch Post Office |
| Reddiapatti B.O | BO | Branch Post Office |
| Sangampatti B.O | BO | Branch Post Office |
| Erakudi S.O | SO | Sub Post Office |
| Baderpettai B.O | BO | Branch Post Office |
| Nagamanaickenpatti B.O | BO | Branch Post Office |
| Vishalakshi Ammal Samudram B.O | BO | Branch Post Office |
| Senappanallur B.O | BO | Branch Post Office |
| Sirunavalur B.O | BO | Branch Post Office |
