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DHN CS CENTER : 1522-7985 / FAX : 0505-299-0001
- Changwon Headquarters : Rooms 715, 716, and 717, Shinhwa The Plex City, 33 Pyeongsan-ro, Uichang-gu, Changwon-si, Gyeongsangnam-do
- Seoul Branch : Room 1220, Sinnae SK V1 Center, 821-2 Sinnae-dong, Jungnang-gu, Seoul
- Daejeon Branch : Room 206, Aniville Plaza, 7 Banseok-ro, Yuseong-gu, Daejeon
- Daegu Branch : Room 513, SW Convergence Tech Biz Center, 160 Alpha City 1-ro, Suseong-gu, Daegu
- Gwangju Branch : Room 533-1, LeHobot Gwangju Business Center, 5th Floor, Sangmu Tower, 7 Sangmu Jungang-ro, Seo-gu, Gwangju
- Busan Branch : Room 615, Busan Venture Tower, 22 Mora-ro, Sasang-gu, Busan
Business Registration No. : 364-88-00974 / Mail-order business Report number : 2018-Changwon Uichang-0272
Special type of value-added telecommunication service provider registration number : No. 3-02-19-0001
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