21 PIN codes
| PIN code | Post offices | Taluk / tehsil |
|---|---|---|
| 631002 | Kilandurai Bo, Nagavedu Bo | – |
| 631003 | Chitteri Bo, Vadamambakkam Bo, Valaikulam Bo | – |
| 631004 | Ekhunagar So, Mosur Bo, Puliyamangalam Bo | – |
| 631005 | Winterpet So | – |
| 631006 | Ins Rajali So | – |
| 631051 | Pallur Bo, Sendamangalam Bo | – |
| 631052 | Ulianallore Bo | – |
| 631102 | Karikkal Bo, Kodakkal Bo, Kondapalayam Bo and 2 more | – |
| 631151 | Iluppaithandalam Bo, Mangattucherry Bo, Uriyur Bo | – |
| 632318 | Valapandal So | – |
| 632501 | Ammoor So, Kalmelkuppam Bo, Ozhughur Bo | – |
| 632506 | Agaram Bo | – |
| 632507 | Sambasivapuram Bo | – |
| 632508 | Seri Bo, Sumaithangi Bo | – |
| 632509 | Federation Buildings Bo | – |
| 632512 | Mohamedpet Bo, Paradarami Bo | – |
| 632513 | Anandhalai Bo, Sathambakkam Bo | – |
| 632514 | Vasur Bo | – |
| 632517 | Kilminnal Bo, Puttuthakku Bo | – |
| 632521 | Vilapakkam So | – |
| 632531 | Ocheri So, Ayarpadi Bo, Kalathur Bo | – |