AS3561 204.189.120.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048204.189.120.0/24204.189.121.0/24204.189.122.0/24204.189.123.0/24204.189.124.0/24204.189.125.0/24204.189.126.0/24204.189.127.0/24