AS3561 216.136.144.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048216.136.144.0/24216.136.145.0/24216.136.146.0/24216.136.147.0/24216.136.148.0/24216.136.149.0/24216.136.150.0/24216.136.151.0/24