AS3561 64.209.248.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 204864.209.248.0/2464.209.249.0/2464.209.250.0/2464.209.251.0/2464.209.252.0/2464.209.253.0/2464.209.254.0/2464.209.255.0/24