AS4766 121.190.216.0/21 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 2046Addressable IPs: 2048121.190.216.0/24121.190.217.0/24121.190.218.0/24121.190.219.0/24121.190.220.0/24121.190.221.0/24121.190.222.0/24121.190.223.0/24