AS17421 221.120.40.0/21 CIDR and IP Range Summary.ASN: 17421 - Mobile Business GroupHost Count: 2046Addressable IPs: 2048221.120.40.0/24221.120.41.0/24221.120.42.0/24221.120.43.0/24221.120.44.0/24221.120.45.0/24221.120.46.0/24221.120.47.0/24