AS7018 209.215.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 2048209.215.136.0/24209.215.137.0/24209.215.138.0/24209.215.139.0/24209.215.140.0/24209.215.141.0/24209.215.142.0/24209.215.143.0/24