AS3561 63.128.40.0/21 CIDR and IP Range Summary.ASN: 3561 - CenturyLink Communications LLCHost Count: 2046Addressable IPs: 204863.128.40.0/2463.128.41.0/2463.128.42.0/2463.128.43.0/2463.128.44.0/2463.128.45.0/2463.128.46.0/2463.128.47.0/24