AS4766 121.137.64.0/20 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 4094Addressable IPs: 4096121.137.64.0/24121.137.65.0/24121.137.66.0/24121.137.67.0/24121.137.68.0/24121.137.69.0/24121.137.70.0/24121.137.71.0/24121.137.72.0/24121.137.73.0/24121.137.74.0/24121.137.75.0/24121.137.76.0/24121.137.77.0/24121.137.78.0/24121.137.79.0/24