AS17421 221.120.0.0/20 CIDR and IP Range Summary.ASN: 17421 - Mobile Business GroupHost Count: 4094Addressable IPs: 4096221.120.0.0/24221.120.1.0/24221.120.2.0/24221.120.3.0/24221.120.4.0/24221.120.5.0/24221.120.6.0/24221.120.7.0/24221.120.8.0/24221.120.9.0/24221.120.10.0/24221.120.11.0/24221.120.12.0/24221.120.13.0/24221.120.14.0/24221.120.15.0/24