AS3561 206.155.56.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048206.155.56.0/24206.155.57.0/24206.155.58.0/24206.155.59.0/24206.155.60.0/24206.155.61.0/24206.155.62.0/24206.155.63.0/24