AS4766 121.131.128.0/20 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 4094Addressable IPs: 4096121.131.128.0/24121.131.129.0/24121.131.130.0/24121.131.131.0/24121.131.132.0/24121.131.133.0/24121.131.134.0/24121.131.135.0/24121.131.136.0/24121.131.137.0/24121.131.138.0/24121.131.139.0/24121.131.140.0/24121.131.141.0/24121.131.142.0/24121.131.143.0/24