AS3561 64.243.216.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 204864.243.216.0/2464.243.217.0/2464.243.218.0/2464.243.219.0/2464.243.220.0/2464.243.221.0/2464.243.222.0/2464.243.223.0/24