AS4766 121.143.224.0/20 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 4094Addressable IPs: 4096121.143.224.0/24121.143.225.0/24121.143.226.0/24121.143.227.0/24121.143.228.0/24121.143.229.0/24121.143.230.0/24121.143.231.0/24121.143.232.0/24121.143.233.0/24121.143.234.0/24121.143.235.0/24121.143.236.0/24121.143.237.0/24121.143.238.0/24121.143.239.0/24