AS7018 12.144.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.144.136.0/2412.144.137.0/2412.144.138.0/2412.144.139.0/2412.144.140.0/2412.144.141.0/2412.144.142.0/2412.144.143.0/24