AS3356 216.143.72.0/21 CIDR and IP Range Summary.ASN: 3356 - Level 3 Parent LLCHost Count: 2046Addressable IPs: 2048216.143.72.0/24216.143.73.0/24216.143.74.0/24216.143.75.0/24216.143.76.0/24216.143.77.0/24216.143.78.0/24216.143.79.0/24