AS7018 12.231.192.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.231.192.0/2412.231.193.0/2412.231.194.0/2412.231.195.0/2412.231.196.0/2412.231.197.0/2412.231.198.0/2412.231.199.0/24