Note: Dial ‘0’ or +91 before the given STD code
| City | Area/Town | STD Code |
| CHENGALPATTU (KANCHEEPURAM) | PONNERI | 4119 |
| CHENGALPATTU (KANCHEEPURAM) | TIRUTTANI | 4118 |
| CHENGALPATTU (KANCHEEPURAM) | TIRUVELLORE | 4116 |
| CHENGALPATTU (KANCHEEPURAM) | MADURANTAGAM | 4115 |
| CHENGALPATTU (KANCHEEPURAM) | CHENGALPATTU | 4114 |
| CHENGALPATTU (KANCHEEPURAM) | KANCHEEPURAM | 4112 |
| CHENGALPATTU (KANCHEEPURAM) | SRIPERUMPUDUR | 4111 |
| CHENNAI | CHENNAI | 44 |
| COIMBATORE | AVANASHI | 4296 |
| COIMBATORE | POLLACHI | 4259 |
| COIMBATORE | PALLADUM | 4255 |
| COIMBATORE | METTUPALAYAM | 4254 |
| COIMBATORE | ANAMALAI | 4253 |
| COIMBATORE | UDUMALPET | 4252 |
| COIMBATORE | COIMBATORE | 422 |
| COIMBATORE | TIRUPUR | 421 |
| CUDDALORE | ARAKANDANALLUR | 4153 |
| CUDDALORE | KALLKURICHI | 4151 |
| CUDDALORE | ULUNDURPET | 4149 |
| CUDDALORE | TINDIVANAM | 4147 |
| CUDDALORE | VILLUPURAM | 4146 |
| CUDDALORE | GINGEE | 4145 |
| CUDDALORE | CHIDAMBARAM | 4144 |
| CUDDALORE | VIRUDHACHALAM | 4143 |
| CUDDALORE | CUDDALORE | 4142 |
| DHARMAPURI | PALACODE | 4348 |
| DHARMAPURI | DENKANIKOITAH | 4347 |
| DHARMAPURI | HARUR | 4346 |
| DHARMAPURI | HOSUR | 4344 |
| DHARMAPURI | KRISHNAGIRI | 4343 |
| DHARMAPURI | DHARMAPURI | 4342 |
| DHARMAPURI | UTHANGARAI | 4341 |
| ERODE | SATHIYAMANGALAM | 4295 |
| ERODE | PERUNDURAI | 4294 |
| ERODE | GOBICHETTIPALAYAM | 4285 |
| ERODE | DHARAMPURAM | 4258 |
| ERODE | KANGAYAM | 4257 |
| ERODE | BHAVANI | 4256 |
| ERODE | KODUMUDI | 4204 |
| ERODE | MULANUR | 4202 |
| ERODE | ERODE | 424 |
| KARAIKUDI | TIRUPATHUR | 4577 |
| KARAIKUDI | MUDUKULATHUR | 4576 |
| KARAIKUDI | SIVAGANGA | 4575 |
| KARAIKUDI | MANAMADURAI | 4574 |
| KARAIKUDI | RAMESHWARAM | 4573 |
| KARAIKUDI | RAMANATHPURAM | 4567 |
| KARAIKUDI | KARAIKUDI | 4565 |
| KARAIKUDI | PARAMAKUDI | 4564 |
| KARAIKUDI | DEVAKOTTAI | 4561 |
| MADURAI | CUMBUM | 4554 |
| MADURAI | ODDANCHATRAM | 4553 |
| MADURAI | USILIAMPATTI | 4552 |
| MADURAI | VEDASANDUR | 4551 |
| MADURAI | THIRUMANGLAM | 4549 |
| MADURAI | THENI | 4546 |
| MADURAI | PALANI | 4545 |
| MADURAI | NATHAM | 4544 |
| MADURAI | BATLAGUNDU | 4543 |
| MADURAI | KODAIKANAL | 4542 |
| MADURAI | MADURAI | 452 |
| MADURAI | DINDIGUL | 451 |
| NAGARCOIL | NAGERCOIL | 4652 |
| NAGARCOIL | KUZHITHURAI | 4651 |
| OOTY | KOTAGIRI | 4266 |
| OOTY | GUDALUR | 4262 |
| OOTY | OOTACAMUND | 423 |
| PONDICHERY | PONDICHERRY | 413 |
| SALEM | METTURDAM | 4298 |
| SALEM | VALAPADY | 4292 |
| SALEM | OMALUR | 4290 |
| SALEM | TIRUCHENGODE | 4288 |
| SALEM | RASIPURAM | 4287 |
| SALEM | NAMAKKAL | 4286 |
| SALEM | SANKAGIRI | 4283 |
| SALEM | ATTUR | 4282 |
| SALEM | YERCAUD | 4281 |
| SALEM | VELUR | 4268 |
| SALEM | SALEM | 427 |
| THANJAVUR | PAPANASAM | 4374 |
| THANJAVUR | PATTUKOTTAI | 4373 |
| THANJAVUR | ORATHANAD | 4372 |
| THANJAVUR | THIRURAIPOONDI | 4369 |
| THANJAVUR | KARAIKAL | 4368 |
| THANJAVUR | MANNARGUDI | 4367 |
| THANJAVUR | TIRUVARUR | 4366 |
| THANJAVUR | NAGAPATTINAM | 4365 |
| THANJAVUR | MAYILADUTHURAI | 4364 |
| THANJAVUR | THANJAVUR | 4362 |
| THANJAVUR | KUMBAKONAM | 435 |
| TIRUNELVELLI | VALLIYOOR | 4637 |
| TIRUNELVELLI | SANKARAN KOIL | 4636 |
| TIRUNELVELLI | NANGUNERI | 4635 |
| TIRUNELVELLI | AMBASAMUDRAM | 4634 |
| TIRUNELVELLI | TENKASI | 4633 |
| TIRUNELVELLI | TIRUNELVELLI | 462 |
| TRICHY | ARANTANGI | 4371 |
| TRICHY | KEERANUR | 4339 |
| TRICHY | PONNAMARAVATHI | 4333 |
| TRICHY | MANAPARAI | 4332 |
| TRICHY | JAYAMKONDAN | 4331 |
| TRICHY | ARIYALUR | 4329 |
| TRICHY | PERAMBALUR | 4328 |
| TRICHY | THURAIYURE | 4327 |
| TRICHY | MUSIRI | 4326 |
| TRICHY | KARUR | 4324 |
| TRICHY | KULITHALAI | 4323 |
| TRICHY | PUDUKKOTTAI | 4322 |
| TRICHY | ARAVAKURICHI | 4320 |
| TRICHY | TRICHY | 431 |
| TUTICORIN | TIRUCHENDUR | 4639 |
| TUTICORIN | VILATHIKULAM | 4638 |
| TUTICORIN | KOVILPATTI | 4632 |
| TUTICORIN | SRIVAIKUNDAM | 4630 |
| TUTICORIN | TUTICORIN | 461 |
| VELLORE | CHENGAM | 4188 |
| VELLORE | WANDIWASH | 4183 |
| VELLORE | TIRUVETTIPURAM | 4182 |
| VELLORE | POLUR | 4181 |
| VELLORE | TIRUPATTUR | 4179 |
| VELLORE | ARKONAM | 4177 |
| VELLORE | TIRUVANNAMALAI | 4175 |
| VELLORE | VANIYAMBADI | 4174 |
| VELLORE | ARNI | 4173 |
| VELLORE | RANIPET | 4172 |
| VELLORE | GUDIYATHAM | 4171 |
| VELLORE | VELLORE | 416 |
| VIRUDHUNAGAR | ARUPPUKOTTAI | 4566 |
| VIRUDHUNAGAR | RAJAPALAYAM | 4563 |
| VIRUDHUNAGAR | VIRUDHUNAGAR | 4562 |