AS17421 42.72.0.0/13 CIDR and IP Range Summary.ASN: 17421 - Mobile Business GroupHost Count: 524286Addressable IPs: 52428842.72.0.0/1642.72.0.0/1642.72.0.0/1642.72.0.0/1642.72.0.0/1642.72.0.0/1642.72.0.0/1642.72.0.0/16