AS1239 72.56.0.0/13 CIDR and IP Range Summary.ASN: 1239 - SprintHost Count: 524286Addressable IPs: 52428872.56.0.0/1672.56.0.0/1672.56.0.0/1672.56.0.0/1672.56.0.0/1672.56.0.0/1672.56.0.0/1672.56.0.0/16