Subnet Calculator

Found at http://sourceforge.net/projects/subntcalc/ - modified the output to fit to Google Gadgets (sourcecode).

Netmask Overview

Private IP Address Blocks

10.0.0.0/8: 10.0.0.0 - 10.255.255.255
172.16.0.0/12: 172.16.0.0 - 172.31.255.255
192.168.0.0/16: 192.168.0.0 - 192.168.255.255

Misc.

• Port Numbers
• Protocol Numbers
• Domain Dossier
• traceroute.org
• RAID Levels
• IBM earlier Models
• IBM RAID Adapter Reference