AS7018 74.172.128.0/18 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 16382Addressable IPs: 1638474.172.128.0/2474.172.129.0/2474.172.130.0/2474.172.131.0/2474.172.132.0/2474.172.133.0/2474.172.134.0/2474.172.135.0/2474.172.136.0/2474.172.137.0/2474.172.138.0/2474.172.139.0/2474.172.140.0/2474.172.141.0/2474.172.142.0/2474.172.143.0/2474.172.144.0/2474.172.145.0/2474.172.146.0/2474.172.147.0/2474.172.148.0/2474.172.149.0/2474.172.150.0/2474.172.151.0/2474.172.152.0/2474.172.153.0/2474.172.154.0/2474.172.155.0/2474.172.156.0/2474.172.157.0/2474.172.158.0/2474.172.159.0/2474.172.160.0/2474.172.161.0/2474.172.162.0/2474.172.163.0/2474.172.164.0/2474.172.165.0/2474.172.166.0/2474.172.167.0/2474.172.168.0/2474.172.169.0/2474.172.170.0/2474.172.171.0/2474.172.172.0/2474.172.173.0/2474.172.174.0/2474.172.175.0/2474.172.176.0/2474.172.177.0/2474.172.178.0/2474.172.179.0/2474.172.180.0/2474.172.181.0/2474.172.182.0/2474.172.183.0/2474.172.184.0/2474.172.185.0/2474.172.186.0/2474.172.187.0/2474.172.188.0/2474.172.189.0/2474.172.190.0/2474.172.191.0/24