AS4766 121.175.16.0/21 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 2046Addressable IPs: 2048121.175.16.0/24121.175.17.0/24121.175.18.0/24121.175.19.0/24121.175.20.0/24121.175.21.0/24121.175.22.0/24121.175.23.0/24