AS7018 71.128.40.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204871.128.40.0/2471.128.41.0/2471.128.42.0/2471.128.43.0/2471.128.44.0/2471.128.45.0/2471.128.46.0/2471.128.47.0/24