AS17584 211.251.216.0/21 CIDR and IP Range Summary.ASN: 17584 - Inchon Metropolitan Office Of EducationHost Count: 2046Addressable IPs: 2048211.251.216.0/24211.251.217.0/24211.251.218.0/24211.251.219.0/24211.251.220.0/24211.251.221.0/24211.251.222.0/24211.251.223.0/24