AS7018 12.172.128.0/19 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 8190Addressable IPs: 819212.172.128.0/2412.172.129.0/2412.172.130.0/2412.172.131.0/2412.172.132.0/2412.172.133.0/2412.172.134.0/2412.172.135.0/2412.172.136.0/2412.172.137.0/2412.172.138.0/2412.172.139.0/2412.172.140.0/2412.172.141.0/2412.172.142.0/2412.172.143.0/2412.172.144.0/2412.172.145.0/2412.172.146.0/2412.172.147.0/2412.172.148.0/2412.172.149.0/2412.172.150.0/2412.172.151.0/2412.172.152.0/2412.172.153.0/2412.172.154.0/2412.172.155.0/2412.172.156.0/2412.172.157.0/2412.172.158.0/2412.172.159.0/24