AS3561 206.128.144.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048206.128.144.0/24206.128.145.0/24206.128.146.0/24206.128.147.0/24206.128.148.0/24206.128.149.0/24206.128.150.0/24206.128.151.0/24