In The Nilgiris district, Tamil Nadu, PIN code 643001 is anchored by St Marys Hill S.O, a Sub Post Office. Mail addressed to this code is sorted through the Southern Postal Region, across 4 listed offices.
| Post office | Type | Full name |
|---|---|---|
| St Marys Hill S.O | SO | Sub Post Office |
| Udagamandalam Market S.O | SO | Sub Post Office |
| Charing Cross S.O | SO | Sub Post Office |
| Udagamandalam H.O | HO | Head Post Office |
