AS7018 66.138.128.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409666.138.128.0/2466.138.129.0/2466.138.130.0/2466.138.131.0/2466.138.132.0/2466.138.133.0/2466.138.134.0/2466.138.135.0/2466.138.136.0/2466.138.137.0/2466.138.138.0/2466.138.139.0/2466.138.140.0/2466.138.141.0/2466.138.142.0/2466.138.143.0/24