AS18733 198.20.216.0/21 CIDR and IP Range Summary.ASN: 18733 - ZeniMax Media IncorporatedHost Count: 2046Addressable IPs: 2048198.20.216.0/24198.20.217.0/24198.20.218.0/24198.20.219.0/24198.20.220.0/24198.20.221.0/24198.20.222.0/24198.20.223.0/24