AS3561 216.136.128.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048216.136.128.0/24216.136.129.0/24216.136.130.0/24216.136.131.0/24216.136.132.0/24216.136.133.0/24216.136.134.0/24216.136.135.0/24