AS7018 12.172.0.0/19 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 8190Addressable IPs: 819212.172.0.0/2412.172.1.0/2412.172.2.0/2412.172.3.0/2412.172.4.0/2412.172.5.0/2412.172.6.0/2412.172.7.0/2412.172.8.0/2412.172.9.0/2412.172.10.0/2412.172.11.0/2412.172.12.0/2412.172.13.0/2412.172.14.0/2412.172.15.0/2412.172.16.0/2412.172.17.0/2412.172.18.0/2412.172.19.0/2412.172.20.0/2412.172.21.0/2412.172.22.0/2412.172.23.0/2412.172.24.0/2412.172.25.0/2412.172.26.0/2412.172.27.0/2412.172.28.0/2412.172.29.0/2412.172.30.0/2412.172.31.0/24