AS7018 12.156.40.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.156.40.0/2412.156.41.0/2412.156.42.0/2412.156.43.0/2412.156.44.0/2412.156.45.0/2412.156.46.0/2412.156.47.0/24