AS7018 68.21.224.0/19 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 8190Addressable IPs: 819268.21.224.0/2468.21.225.0/2468.21.226.0/2468.21.227.0/2468.21.228.0/2468.21.229.0/2468.21.230.0/2468.21.231.0/2468.21.232.0/2468.21.233.0/2468.21.234.0/2468.21.235.0/2468.21.236.0/2468.21.237.0/2468.21.238.0/2468.21.239.0/2468.21.240.0/2468.21.241.0/2468.21.242.0/2468.21.243.0/2468.21.244.0/2468.21.245.0/2468.21.246.0/2468.21.247.0/2468.21.248.0/2468.21.249.0/2468.21.250.0/2468.21.251.0/2468.21.252.0/2468.21.253.0/2468.21.254.0/2468.21.255.0/24