AS3561 206.152.136.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048206.152.136.0/24206.152.137.0/24206.152.138.0/24206.152.139.0/24206.152.140.0/24206.152.141.0/24206.152.142.0/24206.152.143.0/24