AS3477 205.156.48.0/21 CIDR and IP Range Summary.ASN: 3477 - National Oceanic and Atmospheric AdministrationHost Count: 2046Addressable IPs: 2048205.156.48.0/24205.156.49.0/24205.156.50.0/24205.156.51.0/24205.156.52.0/24205.156.53.0/24205.156.54.0/24205.156.55.0/24