AS3561 206.129.120.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048206.129.120.0/24206.129.121.0/24206.129.122.0/24206.129.123.0/24206.129.124.0/24206.129.125.0/24206.129.126.0/24206.129.127.0/24