10F KT Chungcheongbuk Customer Center, 1390 Bunpyeong-dong, Heungdeok-gu, Cheongju-si,, Chungcheongbuk-do
202 East Cylux, 716 Suseodong Gangnamgu, Seoul
602 Samyoung bldg 144-22 Samseong 2-dong Gangnam-gu, Seoul
27, Seongseogongdan-ro 11-gil, Dalseo-gu, Daegu 42714 Korea
54, Daedeok-daero 220beon-gil, Seo-gu,, Daejeon
388,3-Ga Dangsan-Dong, Youngdungpo-Gu