AS4766 221.168.40.0/21 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 2046Addressable IPs: 2048221.168.40.0/24221.168.41.0/24221.168.42.0/24221.168.43.0/24221.168.44.0/24221.168.45.0/24221.168.46.0/24221.168.47.0/24