AS4766 220.120.136.0/21 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 2046Addressable IPs: 2048220.120.136.0/24220.120.137.0/24220.120.138.0/24220.120.139.0/24220.120.140.0/24220.120.141.0/24220.120.142.0/24220.120.143.0/24