AS4766 121.135.248.0/21 CIDR and IP Range Summary.ASN: 4766 - Korea TelecomHost Count: 2046Addressable IPs: 2048121.135.248.0/24121.135.249.0/24121.135.250.0/24121.135.251.0/24121.135.252.0/24121.135.253.0/24121.135.254.0/24121.135.255.0/24