In Tiruchirappalli district, Tamil Nadu, PIN code 621722 is anchored by Thinnakulam B.O., a Branch Post Office. Mail addressed to this code is sorted through the Southern Postal Region, across 4 listed offices.
| Post office | Type | Full name |
|---|---|---|
| Thinnakulam B.O. | BO | Branch Post Office |
| Viragalur SO | SO | Sub Post Office |
| Kulamanickam BO | BO | Branch Post Office |
| Alambadi BO | BO | Branch Post Office |
