AS6389 72.159.16.0/21 CIDR and IP Range Summary.ASN: 6389 - Bellsouth.net Inc.Host Count: 2046Addressable IPs: 204872.159.16.0/2472.159.17.0/2472.159.18.0/2472.159.19.0/2472.159.20.0/2472.159.21.0/2472.159.22.0/2472.159.23.0/24