AS3561 206.97.16.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048206.97.16.0/24206.97.17.0/24206.97.18.0/24206.97.19.0/24206.97.20.0/24206.97.21.0/24206.97.22.0/24206.97.23.0/24