AS7018 12.20.128.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.20.128.0/2412.20.129.0/2412.20.130.0/2412.20.131.0/2412.20.132.0/2412.20.133.0/2412.20.134.0/2412.20.135.0/2412.20.136.0/2412.20.137.0/2412.20.138.0/2412.20.139.0/2412.20.140.0/2412.20.141.0/2412.20.142.0/2412.20.143.0/24