AS3561 206.30.168.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048206.30.168.0/24206.30.169.0/24206.30.170.0/24206.30.171.0/24206.30.172.0/24206.30.173.0/24206.30.174.0/24206.30.175.0/24