- net-misc/cidr : 解析 cidr 格式表示的網址區間
- dev-perl/Geo-IP: 轉換 ip 位址成國家/地理位置的工具,其實共有 Perl / python / ruby 等三種版本,此處列的是 perl 版。
ada@www ~ $ cidr 192.168.0.0/10ip address..........: 192.168.0.0
netmask.............: 255.192.0.0network address.....: 192.128.0.0
broadcast address...: 192.191.255.255please wait while host addresses are validated...total host addresses: 4194302
ada@www ~ $ geoiplookup 168.95.192.1 GeoIP Country Edition: TW, Taiwan