AS17623 58.251.48.0/21 CIDR and IP Range Summary.ASN: 17623 - China Unicom Shenzen networkHost Count: 2046Addressable IPs: 204858.251.48.0/2458.251.49.0/2458.251.50.0/2458.251.51.0/2458.251.52.0/2458.251.53.0/2458.251.54.0/2458.251.55.0/24