AS7018 74.171.128.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409674.171.128.0/2474.171.129.0/2474.171.130.0/2474.171.131.0/2474.171.132.0/2474.171.133.0/2474.171.134.0/2474.171.135.0/2474.171.136.0/2474.171.137.0/2474.171.138.0/2474.171.139.0/2474.171.140.0/2474.171.141.0/2474.171.142.0/2474.171.143.0/24