AS3356 66.243.72.0/21 CIDR and IP Range Summary.ASN: 3356 - Level 3 Parent LLCHost Count: 2046Addressable IPs: 204866.243.72.0/2466.243.73.0/2466.243.74.0/2466.243.75.0/2466.243.76.0/2466.243.77.0/2466.243.78.0/2466.243.79.0/24