AS4766 221.162.16.0/21 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 2046Addressable IPs: 2048221.162.16.0/24221.162.17.0/24221.162.18.0/24221.162.19.0/24221.162.20.0/24221.162.21.0/24221.162.22.0/24221.162.23.0/24