203.237.0.0 - 203.237.127.255 (KREONET) KORDIC; 1 ueun-dong, yusong-gu, Taejon, Korea; KR 203.237.128.0 - 203.237.255.255 (KREN) Korean Education Network; San 56-1, Shilrim-dong, Kwanak-gu, Seoul, Korea; KR