AS3356 192.216.72.0/21 CIDR and IP Range Summary.ASN: 3356 - Level 3 Parent LLCHost Count: 2046Addressable IPs: 2048192.216.72.0/24192.216.73.0/24192.216.74.0/24192.216.75.0/24192.216.76.0/24192.216.77.0/24192.216.78.0/24192.216.79.0/24