AS13 128.44.120.0/21 CIDR and IP Range Summary.ASN: 13 - Headquarters USAISCHost Count: 2046Addressable IPs: 2048128.44.120.0/24128.44.121.0/24128.44.122.0/24128.44.123.0/24128.44.124.0/24128.44.125.0/24128.44.126.0/24128.44.127.0/24