| Region | local branch office | Tel. | Fax. |
|---|---|---|---|
| Metropolitan Area | A Metropolitan Base Station Branch | 82-70-7605-3016 | 82-2-865-0994 |
| Namsung Plaza Office 312, 345-30, Gasan-dong, Geumcheon-gu, Seoul, Korea |
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| B Metropolitan Repeater Branch | 82-70-7605-3024 | 82-2-855-0705 | |
| Namsung Plaza Office 310, 345-30, Gasan-dong, Geumcheon-gu, Seoul, Korea |
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| C Metropolitan Transmission Branch(Gangnam) | 82-70-7825-7501 | 82-2-2055-1950 | |
| Namsung Plaza Office 306, 345-30, Gasan-dong, Geumcheon-gu, Seoul, Korea |
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| D Metropolitan Transmission Branch(Gangbuk) | 82-70-7825-7517 | 82-2-704-1119 | |
| Namsung Plaza Office 306, 345-30, Gasan-dong, Geumcheon-gu, Seoul, Korea |
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| Central Region | E Gangwon Branch | 82-70-7602-3275 | 82-33-747-8627 |
| Rezent Plaza Office 401, 22, Sicheong-ro, Wonju-si, Gangwon-do, Republic of Korea |
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| F Chungcheong Branch | 82-42-364-6700 | 82-42-364-6704 | |
| 11F, SKT New Building, 594, Tanbang-dong, Seo-gu ,Daejeon, Korea |
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| Eastern Region | G Gyeongbuk Branch | 82-53-752-9439 | 82-53-752-9447 |
| 6F, Samu Medi Building, 1434, Yulha-dong, Dong-gu, Daegu, Korea |
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| H Gyeongnam Branch | 82-70-8709-2500 | 82-51-702-7024 | |
| 5F, B site, Amarance Building, Oncheon-dong, Dongnae-gu,Busan, Korea |
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| Western Region | i Western Branch | 82-62-464-3000 | 82-62-942-4273 |
| 20-6, Pungyeongcheolgil-ro, Gwangsan-gu, Gwangju, Republic of Korea |