AS4721 203.124.64.0/20 CIDR and IP Range Summary.ASN: 4721 - JCN JCOM Co. Ltd.Host Count: 4094Addressable IPs: 4096203.124.64.0/24203.124.65.0/24203.124.66.0/24203.124.67.0/24203.124.68.0/24203.124.69.0/24203.124.70.0/24203.124.71.0/24203.124.72.0/24203.124.73.0/24203.124.74.0/24203.124.75.0/24203.124.76.0/24203.124.77.0/24203.124.78.0/24203.124.79.0/24