AS3561 216.48.72.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048216.48.72.0/24216.48.73.0/24216.48.74.0/24216.48.75.0/24216.48.76.0/24216.48.77.0/24216.48.78.0/24216.48.79.0/24