AS17621 210.22.120.0/21 CIDR and IP Range Summary.ASN: 17621 - China Unicom Shanghai NetworkHost Count: 2046Addressable IPs: 2048210.22.120.0/24210.22.121.0/24210.22.122.0/24210.22.123.0/24210.22.124.0/24210.22.125.0/24210.22.126.0/24210.22.127.0/24