AS7018 12.172.184.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.172.184.0/2412.172.185.0/2412.172.186.0/2412.172.187.0/2412.172.188.0/2412.172.189.0/2412.172.190.0/2412.172.191.0/24