AS3356 192.216.128.0/21 CIDR and IP Range Summary.ASN: 3356 - Level 3 Parent LLCHost Count: 2046Addressable IPs: 2048192.216.128.0/24192.216.129.0/24192.216.130.0/24192.216.131.0/24192.216.132.0/24192.216.133.0/24192.216.134.0/24192.216.135.0/24