AS17621 58.246.192.0/21 CIDR and IP Range Summary.ASN: 17621 - China Unicom Shanghai NetworkHost Count: 2046Addressable IPs: 204858.246.192.0/2458.246.193.0/2458.246.194.0/2458.246.195.0/2458.246.196.0/2458.246.197.0/2458.246.198.0/2458.246.199.0/24