AS7018 74.172.224.0/19 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 8190Addressable IPs: 819274.172.224.0/2474.172.225.0/2474.172.226.0/2474.172.227.0/2474.172.228.0/2474.172.229.0/2474.172.230.0/2474.172.231.0/2474.172.232.0/2474.172.233.0/2474.172.234.0/2474.172.235.0/2474.172.236.0/2474.172.237.0/2474.172.238.0/2474.172.239.0/2474.172.240.0/2474.172.241.0/2474.172.242.0/2474.172.243.0/2474.172.244.0/2474.172.245.0/2474.172.246.0/2474.172.247.0/2474.172.248.0/2474.172.249.0/2474.172.250.0/2474.172.251.0/2474.172.252.0/2474.172.253.0/2474.172.254.0/2474.172.255.0/24