AS7018 98.72.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204898.72.136.0/2498.72.137.0/2498.72.138.0/2498.72.139.0/2498.72.140.0/2498.72.141.0/2498.72.142.0/2498.72.143.0/24