AS17623 112.91.136.0/21 CIDR and IP Range Summary.ASN: 17623 - China Unicom Shenzen networkHost Count: 2046Addressable IPs: 2048112.91.136.0/24112.91.137.0/24112.91.138.0/24112.91.139.0/24112.91.140.0/24112.91.141.0/24112.91.142.0/24112.91.143.0/24