AS7018 68.255.136.0/21 CIDR and IP Range Summary.ASN: 7018 - AT&T Services Inc.Host Count: 2046Addressable IPs: 204868.255.136.0/2468.255.137.0/2468.255.138.0/2468.255.139.0/2468.255.140.0/2468.255.141.0/2468.255.142.0/2468.255.143.0/24