AS4766 221.164.80.0/20 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 4094Addressable IPs: 4096221.164.80.0/24221.164.81.0/24221.164.82.0/24221.164.83.0/24221.164.84.0/24221.164.85.0/24221.164.86.0/24221.164.87.0/24221.164.88.0/24221.164.89.0/24221.164.90.0/24221.164.91.0/24221.164.92.0/24221.164.93.0/24221.164.94.0/24221.164.95.0/24