AS4766 221.146.232.0/21 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 2046Addressable IPs: 2048221.146.232.0/24221.146.233.0/24221.146.234.0/24221.146.235.0/24221.146.236.0/24221.146.237.0/24221.146.238.0/24221.146.239.0/24