AS3477 204.228.184.0/21 CIDR and IP Range Summary.ASN: 3477 - National Oceanic and Atmospheric AdministrationHost Count: 2046Addressable IPs: 2048204.228.184.0/24204.228.185.0/24204.228.186.0/24204.228.187.0/24204.228.188.0/24204.228.189.0/24204.228.190.0/24204.228.191.0/24