AS17621 113.31.144.0/20 CIDR and IP Range Summary.ASN: 17621 - China Unicom Shanghai NetworkHost Count: 4094Addressable IPs: 4096113.31.144.0/24113.31.145.0/24113.31.146.0/24113.31.147.0/24113.31.148.0/24113.31.149.0/24113.31.150.0/24113.31.151.0/24113.31.152.0/24113.31.153.0/24113.31.154.0/24113.31.155.0/24113.31.156.0/24113.31.157.0/24113.31.158.0/24113.31.159.0/24