AS6389 74.231.200.0/21 CIDR and IP Range Summary.ASN: 6389 - AT&T Enterprises LLCHost Count: 2046Addressable IPs: 204874.231.200.0/2474.231.201.0/2474.231.202.0/2474.231.203.0/2474.231.204.0/2474.231.205.0/2474.231.206.0/2474.231.207.0/24