AS7018 12.204.72.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.204.72.0/2412.204.73.0/2412.204.74.0/2412.204.75.0/2412.204.76.0/2412.204.77.0/2412.204.78.0/2412.204.79.0/24