AS3549 209.12.216.0/21 CIDR and IP Range Summary.ASN: 3549 - Level 3 Parent LLCHost Count: 2046Addressable IPs: 2048209.12.216.0/24209.12.217.0/24209.12.218.0/24209.12.219.0/24209.12.220.0/24209.12.221.0/24209.12.222.0/24209.12.223.0/24