AS7018 12.139.176.0/20 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 4094Addressable IPs: 409612.139.176.0/2412.139.177.0/2412.139.178.0/2412.139.179.0/2412.139.180.0/2412.139.181.0/2412.139.182.0/2412.139.183.0/2412.139.184.0/2412.139.185.0/2412.139.186.0/2412.139.187.0/2412.139.188.0/2412.139.189.0/2412.139.190.0/2412.139.191.0/24