AS6389 66.20.64.0/21 CIDR and IP Range Summary.ASN: 6389 - Bellsouth.net Inc.Host Count: 2046Addressable IPs: 204866.20.64.0/2466.20.65.0/2466.20.66.0/2466.20.67.0/2466.20.68.0/2466.20.69.0/2466.20.70.0/2466.20.71.0/24