AS3561 206.103.216.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048206.103.216.0/24206.103.217.0/24206.103.218.0/24206.103.219.0/24206.103.220.0/24206.103.221.0/24206.103.222.0/24206.103.223.0/24