AS7018 12.221.24.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.221.24.0/2412.221.25.0/2412.221.26.0/2412.221.27.0/2412.221.28.0/2412.221.29.0/2412.221.30.0/2412.221.31.0/24