AS7018 12.19.56.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.19.56.0/2412.19.57.0/2412.19.58.0/2412.19.59.0/2412.19.60.0/2412.19.61.0/2412.19.62.0/2412.19.63.0/24