AS6389 74.231.152.0/21 CIDR and IP Range Summary.ASN: 6389 - AT&T Enterprises LLCHost Count: 2046Addressable IPs: 204874.231.152.0/2474.231.153.0/2474.231.154.0/2474.231.155.0/2474.231.156.0/2474.231.157.0/2474.231.158.0/2474.231.159.0/24