AS3561 206.40.144.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048206.40.144.0/24206.40.145.0/24206.40.146.0/24206.40.147.0/24206.40.148.0/24206.40.149.0/24206.40.150.0/24206.40.151.0/24