AS3561 206.31.128.0/20 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 4094Addressable IPs: 4096206.31.128.0/24206.31.129.0/24206.31.130.0/24206.31.131.0/24206.31.132.0/24206.31.133.0/24206.31.134.0/24206.31.135.0/24206.31.136.0/24206.31.137.0/24206.31.138.0/24206.31.139.0/24206.31.140.0/24206.31.141.0/24206.31.142.0/24206.31.143.0/24