AS7018 12.203.120.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.203.120.0/2412.203.121.0/2412.203.122.0/2412.203.123.0/2412.203.124.0/2412.203.125.0/2412.203.126.0/2412.203.127.0/24