AS7018 71.158.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204871.158.136.0/2471.158.137.0/2471.158.138.0/2471.158.139.0/2471.158.140.0/2471.158.141.0/2471.158.142.0/2471.158.143.0/24