AS7018 12.199.56.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204812.199.56.0/2412.199.57.0/2412.199.58.0/2412.199.59.0/2412.199.60.0/2412.199.61.0/2412.199.62.0/2412.199.63.0/24