AS7018 74.172.0.0/18 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 16382Addressable IPs: 1638474.172.0.0/2474.172.1.0/2474.172.2.0/2474.172.3.0/2474.172.4.0/2474.172.5.0/2474.172.6.0/2474.172.7.0/2474.172.8.0/2474.172.9.0/2474.172.10.0/2474.172.11.0/2474.172.12.0/2474.172.13.0/2474.172.14.0/2474.172.15.0/2474.172.16.0/2474.172.17.0/2474.172.18.0/2474.172.19.0/2474.172.20.0/2474.172.21.0/2474.172.22.0/2474.172.23.0/2474.172.24.0/2474.172.25.0/2474.172.26.0/2474.172.27.0/2474.172.28.0/2474.172.29.0/2474.172.30.0/2474.172.31.0/2474.172.32.0/2474.172.33.0/2474.172.34.0/2474.172.35.0/2474.172.36.0/2474.172.37.0/2474.172.38.0/2474.172.39.0/2474.172.40.0/2474.172.41.0/2474.172.42.0/2474.172.43.0/2474.172.44.0/2474.172.45.0/2474.172.46.0/2474.172.47.0/2474.172.48.0/2474.172.49.0/2474.172.50.0/2474.172.51.0/2474.172.52.0/2474.172.53.0/2474.172.54.0/2474.172.55.0/2474.172.56.0/2474.172.57.0/2474.172.58.0/2474.172.59.0/2474.172.60.0/2474.172.61.0/2474.172.62.0/2474.172.63.0/24