AS7018 12.139.128.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.139.128.0/2412.139.129.0/2412.139.130.0/2412.139.131.0/2412.139.132.0/2412.139.133.0/2412.139.134.0/2412.139.135.0/2412.139.136.0/2412.139.137.0/2412.139.138.0/2412.139.139.0/2412.139.140.0/2412.139.141.0/2412.139.142.0/2412.139.143.0/24