AS3561 63.136.120.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 204863.136.120.0/2463.136.121.0/2463.136.122.0/2463.136.123.0/2463.136.124.0/2463.136.125.0/2463.136.126.0/2463.136.127.0/24