24 PIN codes
| PIN code | Post offices | Taluk / tehsil |
|---|---|---|
| 600005 | Chepauk S.O, Madras University S.O, Tiruvallikeni S.O | – |
| 600006 | Greams Road S.O, Teynampet West S.O | – |
| 600010 | Kilpauk S.O | – |
| 600011 | Sembiam S.O | – |
| 600013 | Rayapuram S.O | – |
| 600016 | Chennai Airport S.O | – |
| 600017 | Hindi Prachar Sabha S.O | – |
| 600018 | Teynampet S.O | – |
| 600021 | Washermanpet East S.O | – |
| 600031 | Chetput S.O | – |
| 600034 | Loyola College S.O, Nungambakkam High Road S.O | – |
| 600039 | Vyasarpadi S.O | – |
| 600050 | Padi So | – |
| 600058 | Ambattur Indl Estate So | – |
| 600068 | Manali So Tiruvallur | – |
| 600078 | Kalaignar Karunanidhi Nagar S.O | – |
| 600081 | Tondiarpet Bazaar S.O, Tondiarpet S.O | – |
| 600082 | Kumaran Nagar S.O | – |
| 600097 | Karapakkam S.O, Oggiamthoraipakkam S.O | – |
| 600099 | Kolathur So | – |
| 600106 | Arumbakkam S.O | – |
| 600115 | Injambakkam S.O | – |
| 600118 | Kodungaiyur So | – |
| 600125 | Mugalivakkam So | – |