AS7018 66.139.0.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409666.139.0.0/2466.139.1.0/2466.139.2.0/2466.139.3.0/2466.139.4.0/2466.139.5.0/2466.139.6.0/2466.139.7.0/2466.139.8.0/2466.139.9.0/2466.139.10.0/2466.139.11.0/2466.139.12.0/2466.139.13.0/2466.139.14.0/2466.139.15.0/24