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| STD Numbers of Tamil Nadu | |
| | Tamil Nadu Areas | STD Codes | Sankagiri | 04283 | Sankaran Koil | 04636 | Sathiyamangalam | 04295 | Sivaganga | 04575 | Sriperumpudur | 044 | Srivaikundam | 04630 | Tenkasi | 04633 | Thanjavur | 04362 | Theni | 04546 | Thirumanglam | 04549 | Thiruraipoondi | 04369 | Thuraiyure | 04327 | Tindivanam | 04147 | Tiruchendur | 04639 | Tiruchengode | 04288 | Tirunelvelli | 0462 | Tirupathur | 04577 | Tirupattur | 04179 | Tirupur | 0421 | Tiruttani | 044 | Tiruvannamalai | 04175 | Tiruvarur | 04366 |
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