AS7018 12.28.40.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.28.40.0/2412.28.41.0/2412.28.42.0/2412.28.43.0/2412.28.44.0/2412.28.45.0/2412.28.46.0/2412.28.47.0/24