AS7018 12.189.128.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.189.128.0/2412.189.129.0/2412.189.130.0/2412.189.131.0/2412.189.132.0/2412.189.133.0/2412.189.134.0/2412.189.135.0/24