AS7018 12.176.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.176.136.0/2412.176.137.0/2412.176.138.0/2412.176.139.0/2412.176.140.0/2412.176.141.0/2412.176.142.0/2412.176.143.0/24