AS1 8.15.72.0/21 CIDR and IP Range Summary.ASN: 1 - Level 3 Parent LLCHost Count: 2046Addressable IPs: 20488.15.72.0/248.15.73.0/248.15.74.0/248.15.75.0/248.15.76.0/248.15.77.0/248.15.78.0/248.15.79.0/24