AS15133 72.21.83.176/28 CIDR and IP Range Summary.ASN: 15133 - Edgecast Inc.Host Count: 14Addressable IPs: 16 72.21.83.17772.21.83.17872.21.83.17972.21.83.18072.21.83.18172.21.83.18272.21.83.18372.21.83.18472.21.83.18572.21.83.18672.21.83.18772.21.83.18872.21.83.18972.21.83.19072.21.83.19172.21.83.192