AS17621 140.206.176.0/20 CIDR and IP Range Summary.ASN: 17621 - China Unicom Shanghai NetworkHost Count: 4094Addressable IPs: 4096140.206.176.0/24140.206.177.0/24140.206.178.0/24140.206.179.0/24140.206.180.0/24140.206.181.0/24140.206.182.0/24140.206.183.0/24140.206.184.0/24140.206.185.0/24140.206.186.0/24140.206.187.0/24140.206.188.0/24140.206.189.0/24140.206.190.0/24140.206.191.0/24