AS7018 12.148.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.148.136.0/2412.148.137.0/2412.148.138.0/2412.148.139.0/2412.148.140.0/2412.148.141.0/2412.148.142.0/2412.148.143.0/24