AS3561 216.91.64.0/20 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 4094Addressable IPs: 4096216.91.64.0/24216.91.65.0/24216.91.66.0/24216.91.67.0/24216.91.68.0/24216.91.69.0/24216.91.70.0/24216.91.71.0/24216.91.72.0/24216.91.73.0/24216.91.74.0/24216.91.75.0/24216.91.76.0/24216.91.77.0/24216.91.78.0/24216.91.79.0/24