Finding and making a network subnet calculator¶
Doing subnet calculations by hand can be tedious and thankfully there are tools available online to help with that. One in particular Subnet Calculator with a PHP backend was handy and compact.
I've sent a few requests asking if I could re-write it to be client side so that it could be used in intranet applications or even possibly be ported as an hand-held application. After a few months of waiting and no response, I repurposed some of their CSS and layout and wrote the javascript equivalent.
The code is released as open source and can be reused as per terms of the license. It is part of the WP-Mindwerks wordpress plugin, but you can use it also as a standalone webpage.
ipcalc