AS7018 12.191.56.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.191.56.0/2412.191.57.0/2412.191.58.0/2412.191.59.0/2412.191.60.0/2412.191.61.0/2412.191.62.0/2412.191.63.0/24