AS7018 12.168.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.168.136.0/2412.168.137.0/2412.168.138.0/2412.168.139.0/2412.168.140.0/2412.168.141.0/2412.168.142.0/2412.168.143.0/24