AS13 199.10.48.0/21 CIDR and IP Range Summary.ASN: 13 - Headquarters USAISCHost Count: 2046Addressable IPs: 2048199.10.48.0/24199.10.49.0/24199.10.50.0/24199.10.51.0/24199.10.52.0/24199.10.53.0/24199.10.54.0/24199.10.55.0/24