AS1 8.10.72.0/21 CIDR and IP Range Summary.ASN: 1 - Level 3 Parent LLCHost Count: 2046Addressable IPs: 20488.10.72.0/248.10.73.0/248.10.74.0/248.10.75.0/248.10.76.0/248.10.77.0/248.10.78.0/248.10.79.0/24