AS9848 203.243.128.0/21 CIDR and IP Range Summary.ASN: 9848 - Sejong TelecomHost Count: 2046Addressable IPs: 2048203.243.128.0/24203.243.129.0/24203.243.130.0/24203.243.131.0/24203.243.132.0/24203.243.133.0/24203.243.134.0/24203.243.135.0/24