AS37 198.91.64.0/21 CIDR and IP Range Summary.ASN: 37 - Navy Network Information Center (NNIC)Host Count: 2046Addressable IPs: 2048198.91.64.0/24198.91.65.0/24198.91.66.0/24198.91.67.0/24198.91.68.0/24198.91.69.0/24198.91.70.0/24198.91.71.0/24