AS7018 12.221.224.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.221.224.0/2412.221.225.0/2412.221.226.0/2412.221.227.0/2412.221.228.0/2412.221.229.0/2412.221.230.0/2412.221.231.0/24