AS3561 216.104.224.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048216.104.224.0/24216.104.225.0/24216.104.226.0/24216.104.227.0/24216.104.228.0/24216.104.229.0/24216.104.230.0/24216.104.231.0/24