AS6389 74.231.128.0/20 CIDR and IP Range Summary.ASN: 6389 - AT&T Enterprises LLCHost Count: 4094Addressable IPs: 409674.231.128.0/2474.231.129.0/2474.231.130.0/2474.231.131.0/2474.231.132.0/2474.231.133.0/2474.231.134.0/2474.231.135.0/2474.231.136.0/2474.231.137.0/2474.231.138.0/2474.231.139.0/2474.231.140.0/2474.231.141.0/2474.231.142.0/2474.231.143.0/24