AS3561 208.144.56.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048208.144.56.0/24208.144.57.0/24208.144.58.0/24208.144.59.0/24208.144.60.0/24208.144.61.0/24208.144.62.0/24208.144.63.0/24