AS17621 140.207.144.0/20 CIDR and IP Range Summary.ASN: 17621 - China Unicom Shanghai NetworkHost Count: 4094Addressable IPs: 4096140.207.144.0/24140.207.145.0/24140.207.146.0/24140.207.147.0/24140.207.148.0/24140.207.149.0/24140.207.150.0/24140.207.151.0/24140.207.152.0/24140.207.153.0/24140.207.154.0/24140.207.155.0/24140.207.156.0/24140.207.157.0/24140.207.158.0/24140.207.159.0/24