AS10099 121.91.136.0/21 CIDR and IP Range Summary.ASN: 10099 - China Unicom GlobalHost Count: 2046Addressable IPs: 2048121.91.136.0/24121.91.137.0/24121.91.138.0/24121.91.139.0/24121.91.140.0/24121.91.141.0/24121.91.142.0/24121.91.143.0/24