203.234.0.0 - 203.234.127.255 (KREN) Korean Education Network; San 56-1, Shilrim-dong, Kwanak-gu, Seoul, Korea; KR 203.234.128.0 - 203.234.255.255 (KORNET) Korea Telecom; 100 Sejong-no Chongno-gu Seoul, Korea; 110-777; KR