AS6389 66.21.48.0/20 CIDR and IP Range Summary.ASN: 6389 - Bellsouth.net Inc.Host Count: 4094Addressable IPs: 409666.21.48.0/2466.21.49.0/2466.21.50.0/2466.21.51.0/2466.21.52.0/2466.21.53.0/2466.21.54.0/2466.21.55.0/2466.21.56.0/2466.21.57.0/2466.21.58.0/2466.21.59.0/2466.21.60.0/2466.21.61.0/2466.21.62.0/2466.21.63.0/24