AS3561 209.144.200.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048209.144.200.0/24209.144.201.0/24209.144.202.0/24209.144.203.0/24209.144.204.0/24209.144.205.0/24209.144.206.0/24209.144.207.0/24