AS4808 221.216.0.0/13 CIDR and IP Range Summary.ASN: 4808 - China169-BJ China Unicom Beijing Province NetworkHost Count: 524286Addressable IPs: 524288221.216.0.0/16221.216.0.0/16221.216.0.0/16221.216.0.0/16221.216.0.0/16221.216.0.0/16221.216.0.0/16221.216.0.0/16