AS4766 115.21.144.0/20 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 4094Addressable IPs: 4096115.21.144.0/24115.21.145.0/24115.21.146.0/24115.21.147.0/24115.21.148.0/24115.21.149.0/24115.21.150.0/24115.21.151.0/24115.21.152.0/24115.21.153.0/24115.21.154.0/24115.21.155.0/24115.21.156.0/24115.21.157.0/24115.21.158.0/24115.21.159.0/24