AS27357 72.4.144.0/21 CIDR and IP Range Summary.ASN: 27357 - Rackspace HostingHost Count: 2046Addressable IPs: 204872.4.144.0/2472.4.145.0/2472.4.146.0/2472.4.147.0/2472.4.148.0/2472.4.149.0/2472.4.150.0/2472.4.151.0/24