AS7018 199.107.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 2048199.107.136.0/24199.107.137.0/24199.107.138.0/24199.107.139.0/24199.107.140.0/24199.107.141.0/24199.107.142.0/24199.107.143.0/24