AS17621 58.246.168.0/21 CIDR and IP Range Summary.ASN: 17621 - China Unicom Shanghai NetworkHost Count: 2046Addressable IPs: 204858.246.168.0/2458.246.169.0/2458.246.170.0/2458.246.171.0/2458.246.172.0/2458.246.173.0/2458.246.174.0/2458.246.175.0/24