AS7018 12.17.40.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.17.40.0/2412.17.41.0/2412.17.42.0/2412.17.43.0/2412.17.44.0/2412.17.45.0/2412.17.46.0/2412.17.47.0/24