AS7018 12.156.56.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.156.56.0/2412.156.57.0/2412.156.58.0/2412.156.59.0/2412.156.60.0/2412.156.61.0/2412.156.62.0/2412.156.63.0/24