TNEB region code for Chennai, Cuddalore, Trichy, Dindigul, Karur, Vellore, Virudhunagar, Erode, Avadi, Ambattur, Dharmapuri, Salem, Kanchipuram, Madurai, Villupuram, Guduvanchery, Hosur, Karaikudi, Kumbakonam, Kovilpatti, Kovilambakkam, West-mambalam, Namakkal, Nagapattinam, Porur, Pallikaranai Pudukkottai, Rasipuram, Nagercoil, Sivagangai, Thiruvallur, Tirunelveli, Urapakkam
TNEB Region Code for All Zones
| Region | Region Code | Section | Distribution | |||
| 1 | Chennai – South | 09 | List | |||
| 2 | Chennai- North | 01 | List | |||
| 3 | Coimbatore | 03 | List | |||
| 4 | Erode | 04 | List | |||
| 5 | Madurai | 05 | List | |||
| 6 | Trichy | 06 | List | |||
| 7 | Tirunelveli | 07 | List | Nagercoil, | ||
| 8 | Vellore | 08 | List | |||
| 9 | Villupuram | 02 | List | |||