AS7018 12.203.0.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.203.0.0/2412.203.1.0/2412.203.2.0/2412.203.3.0/2412.203.4.0/2412.203.5.0/2412.203.6.0/2412.203.7.0/24