AS4766 121.171.128.0/20 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 4094Addressable IPs: 4096121.171.128.0/24121.171.129.0/24121.171.130.0/24121.171.131.0/24121.171.132.0/24121.171.133.0/24121.171.134.0/24121.171.135.0/24121.171.136.0/24121.171.137.0/24121.171.138.0/24121.171.139.0/24121.171.140.0/24121.171.141.0/24121.171.142.0/24121.171.143.0/24