AS21547 72.12.64.0/20 CIDR and IP Range Summary.ASN: 21547 - First Light FiberHost Count: 4094Addressable IPs: 409672.12.64.0/2472.12.65.0/2472.12.66.0/2472.12.67.0/2472.12.68.0/2472.12.69.0/2472.12.70.0/2472.12.71.0/2472.12.72.0/2472.12.73.0/2472.12.74.0/2472.12.75.0/2472.12.76.0/2472.12.77.0/2472.12.78.0/2472.12.79.0/24