AS6389 66.21.128.0/17 CIDR and IP Range Summary.ASN: 6389 - Bellsouth.net Inc.Host Count: 32766Addressable IPs: 3276866.21.128.0/2466.21.129.0/2466.21.130.0/2466.21.131.0/2466.21.132.0/2466.21.133.0/2466.21.134.0/2466.21.135.0/2466.21.136.0/2466.21.137.0/2466.21.138.0/2466.21.139.0/2466.21.140.0/2466.21.141.0/2466.21.142.0/2466.21.143.0/2466.21.144.0/2466.21.145.0/2466.21.146.0/2466.21.147.0/2466.21.148.0/2466.21.149.0/2466.21.150.0/2466.21.151.0/2466.21.152.0/2466.21.153.0/2466.21.154.0/2466.21.155.0/2466.21.156.0/2466.21.157.0/2466.21.158.0/2466.21.159.0/2466.21.160.0/2466.21.161.0/2466.21.162.0/2466.21.163.0/2466.21.164.0/2466.21.165.0/2466.21.166.0/2466.21.167.0/2466.21.168.0/2466.21.169.0/2466.21.170.0/2466.21.171.0/2466.21.172.0/2466.21.173.0/2466.21.174.0/2466.21.175.0/2466.21.176.0/2466.21.177.0/2466.21.178.0/2466.21.179.0/2466.21.180.0/2466.21.181.0/2466.21.182.0/2466.21.183.0/2466.21.184.0/2466.21.185.0/2466.21.186.0/2466.21.187.0/2466.21.188.0/2466.21.189.0/2466.21.190.0/2466.21.191.0/2466.21.192.0/2466.21.193.0/2466.21.194.0/2466.21.195.0/2466.21.196.0/2466.21.197.0/2466.21.198.0/2466.21.199.0/2466.21.200.0/2466.21.201.0/2466.21.202.0/2466.21.203.0/2466.21.204.0/2466.21.205.0/2466.21.206.0/2466.21.207.0/2466.21.208.0/2466.21.209.0/2466.21.210.0/2466.21.211.0/2466.21.212.0/2466.21.213.0/2466.21.214.0/2466.21.215.0/2466.21.216.0/2466.21.217.0/2466.21.218.0/2466.21.219.0/2466.21.220.0/2466.21.221.0/2466.21.222.0/2466.21.223.0/2466.21.224.0/2466.21.225.0/2466.21.226.0/2466.21.227.0/2466.21.228.0/2466.21.229.0/2466.21.230.0/2466.21.231.0/2466.21.232.0/2466.21.233.0/2466.21.234.0/2466.21.235.0/2466.21.236.0/2466.21.237.0/2466.21.238.0/2466.21.239.0/2466.21.240.0/2466.21.241.0/2466.21.242.0/2466.21.243.0/2466.21.244.0/2466.21.245.0/2466.21.246.0/2466.21.247.0/2466.21.248.0/2466.21.249.0/2466.21.250.0/2466.21.251.0/2466.21.252.0/2466.21.253.0/2466.21.254.0/2466.21.255.0/24