AS4766 121.165.160.0/21 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 2046Addressable IPs: 2048121.165.160.0/24121.165.161.0/24121.165.162.0/24121.165.163.0/24121.165.164.0/24121.165.165.0/24121.165.166.0/24121.165.167.0/24