AS7018 81.31.128.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409681.31.128.0/2481.31.129.0/2481.31.130.0/2481.31.131.0/2481.31.132.0/2481.31.133.0/2481.31.134.0/2481.31.135.0/2481.31.136.0/2481.31.137.0/2481.31.138.0/2481.31.139.0/2481.31.140.0/2481.31.141.0/2481.31.142.0/2481.31.143.0/24