In The Nilgiris district, Tamil Nadu, PIN code 643103 is anchored by Pasteur Institute S.O, a Sub Post Office. Mail addressed to this code is sorted through the Southern Postal Region, across 3 listed offices.
| Post office | Type | Full name |
|---|---|---|
| Pasteur Institute S.O | SO | Sub Post Office |
| Halakkarai B.O | BO | Branch Post Office |
| Yedappalli B.O | BO | Branch Post Office |
