AS7018 199.186.16.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 2048199.186.16.0/24199.186.17.0/24199.186.18.0/24199.186.19.0/24199.186.20.0/24199.186.21.0/24199.186.22.0/24199.186.23.0/24