AS7018 12.28.56.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.28.56.0/2412.28.57.0/2412.28.58.0/2412.28.59.0/2412.28.60.0/2412.28.61.0/2412.28.62.0/2412.28.63.0/24