AS17623 157.255.200.0/21 CIDR and IP Range Summary.ASN: 17623 - China Unicom Shenzen networkHost Count: 2046Addressable IPs: 2048157.255.200.0/24157.255.201.0/24157.255.202.0/24157.255.203.0/24157.255.204.0/24157.255.205.0/24157.255.206.0/24157.255.207.0/24