AS3356 216.143.224.0/21 CIDR and IP Range Summary.ASN: 3356 - Level 3 Parent LLCHost Count: 2046Addressable IPs: 2048216.143.224.0/24216.143.225.0/24216.143.226.0/24216.143.227.0/24216.143.228.0/24216.143.229.0/24216.143.230.0/24216.143.231.0/24