AS4766 210.121.144.0/21 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 2046Addressable IPs: 2048210.121.144.0/24210.121.145.0/24210.121.146.0/24210.121.147.0/24210.121.148.0/24210.121.149.0/24210.121.150.0/24210.121.151.0/24