AS3561 209.144.104.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048209.144.104.0/24209.144.105.0/24209.144.106.0/24209.144.107.0/24209.144.108.0/24209.144.109.0/24209.144.110.0/24209.144.111.0/24