Thumbalam B.O is the primary post office registered under PIN code 621211 in Tiruchirappalli, Tamil Nadu. This code sits within the Southern Postal Region, with 9 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Thumbalam B.O | BO | Branch Post Office |
| Vellalapatti B.O | BO | Branch Post Office |
| M.Pudupatti B.O | BO | Branch Post Office |
| Sittalarai B.O | BO | Branch Post Office |
| Musiri S.O | SO | Sub Post Office |
| Mettupatti B.O | BO | Branch Post Office |
| Parvathipuram S.O | SO | Sub Post Office |
| A.A. College B.O | BO | Branch Post Office |
| Valavandhi B.O | BO | Branch Post Office |
