AS3561 209.185.16.0/20 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 4094Addressable IPs: 4096209.185.16.0/24209.185.17.0/24209.185.18.0/24209.185.19.0/24209.185.20.0/24209.185.21.0/24209.185.22.0/24209.185.23.0/24209.185.24.0/24209.185.25.0/24209.185.26.0/24209.185.27.0/24209.185.28.0/24209.185.29.0/24209.185.30.0/24209.185.31.0/24