AS17623 123.58.40.0/21 CIDR and IP Range Summary.ASN: 17623 - China Unicom Shenzen networkHost Count: 2046Addressable IPs: 2048123.58.40.0/24123.58.41.0/24123.58.42.0/24123.58.43.0/24123.58.44.0/24123.58.45.0/24123.58.46.0/24123.58.47.0/24