AS20001 66.75.208.0/21 CIDR and IP Range Summary.ASN: 20001 - Charter Communications IncHost Count: 2046Addressable IPs: 204866.75.208.0/2466.75.209.0/2466.75.210.0/2466.75.211.0/2466.75.212.0/2466.75.213.0/2466.75.214.0/2466.75.215.0/24