AS3561 205.138.248.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 2048205.138.248.0/24205.138.249.0/24205.138.250.0/24205.138.251.0/24205.138.252.0/24205.138.253.0/24205.138.254.0/24205.138.255.0/24