AS4766 220.66.152.0/21 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 2046Addressable IPs: 2048220.66.152.0/24220.66.153.0/24220.66.154.0/24220.66.155.0/24220.66.156.0/24220.66.157.0/24220.66.158.0/24220.66.159.0/24