AS4721 114.142.128.0/21 CIDR and IP Range Summary.ASN: 4721 - JCN JCOM Co. Ltd.Host Count: 2046Addressable IPs: 2048114.142.128.0/24114.142.129.0/24114.142.130.0/24114.142.131.0/24114.142.132.0/24114.142.133.0/24114.142.134.0/24114.142.135.0/24