AS7018 12.48.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.48.136.0/2412.48.137.0/2412.48.138.0/2412.48.139.0/2412.48.140.0/2412.48.141.0/2412.48.142.0/2412.48.143.0/24