AS4766 115.21.136.0/21 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 2046Addressable IPs: 2048115.21.136.0/24115.21.137.0/24115.21.138.0/24115.21.139.0/24115.21.140.0/24115.21.141.0/24115.21.142.0/24115.21.143.0/24