AS524 8.243.72.0/21 CIDR and IP Range Summary.ASN: 524 - Global Crossing Americas Solutions LLCHost Count: 2046Addressable IPs: 20488.243.72.0/248.243.73.0/248.243.74.0/248.243.75.0/248.243.76.0/248.243.77.0/248.243.78.0/248.243.79.0/24