AS3561 206.142.248.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048206.142.248.0/24206.142.249.0/24206.142.250.0/24206.142.251.0/24206.142.252.0/24206.142.253.0/24206.142.254.0/24206.142.255.0/24