AS7018 12.153.56.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.153.56.0/2412.153.57.0/2412.153.58.0/2412.153.59.0/2412.153.60.0/2412.153.61.0/2412.153.62.0/2412.153.63.0/24