Sandarayanpalayam B.O is the primary post office registered under PIN code 602023 in Thiruvallur, Tamil Nadu. This code sits within the Southern Postal Region, with 12 offices operating under it.
| Post office | Type | Full name |
|---|---|---|
| Sandarayanpalayam B.O | BO | Branch Post Office |
| Timmaboopalapuram B.O | BO | Branch Post Office |
| Neiveli B.O | BO | Branch Post Office |
| Odappai B.O | BO | Branch Post Office |
| Vellathukottai B.O | BO | Branch Post Office |
| Poondi S.O | SO | Sub Post Office |
| Allikuzhi B.O | BO | Branch Post Office |
| Nambakkam B.O | BO | Branch Post Office |
| Pullarambakkam B.O | BO | Branch Post Office |
| Devandavakkam B.O | BO | Branch Post Office |
| Nelvoy B.O | BO | Branch Post Office |
| Placepalayam B.O | BO | Branch Post Office |
