AS3561 206.99.176.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048206.99.176.0/24206.99.177.0/24206.99.178.0/24206.99.179.0/24206.99.180.0/24206.99.181.0/24206.99.182.0/24206.99.183.0/24