This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

numly Numbers


numly Numbers was born from a very old plugin called wp-numly which was originally called wp-esbn that was
coded by Cal Evans. But over the years his plugin stopped working and he no longer worked on it. I took the
old plugin and chopped out what wasn’t needed and fixed what was broken which gave birth to numly Numbers.

Electronic Standard Number (numly) is the unique identifier of electronic content and media. numlys are
recognized worldwide by electronic publishing companies and electronic content providers. They serve as branded
identifier or copyright for individuals or companies developing electronic content and media. numlys are
assigned and managed by

The plugin registers your copyright with Numly and returns the Numly Number (electronic serial number), barcode,
and verification links to your blog post automatically.

I hope you enjoy numly numbers as much as I do.

*** NOTE *** You must have a active subscription at for this addon to work.

If you like this plugin please donate.

Visit our Firefox addon for numly Numbers.


  • Screen shot of numly.
  • Screen shot of the settings page.


  1. Copy the entire folder numly-numbers/ into wp-content/plugins/ folder on your blog.
  2. Activate the plugin by going to your blog’s Plugin tab and clicking Activate.
  3. Then go to the Settings menu and you’ll see numly numbers listed. Enter your numly username,
    chose the license you want to use, and whether you want to show the barcode or not.
  4. Some where in the post loop such as in the single.php page paste the following where you want it
    to show <?php if (function_exists('numly_output')) _e('<strong>ESN Copyright:</strong>'); numly_output($id); ?>


I found a bug, have a question or the plugin doesn’t work anymore. What should I do ?

Go here to report it.

Will this plugin generate a ESN for pages.

No. You will have manually create a number at or install the FF addon and add that number to the Custom Field “numly_key” for the page.


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Contributors & Developers

“numly Numbers” is open source software. The following people have contributed to this plugin.


Translate “numly Numbers” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.



  • Upped the version to support WP 3.3


  • Upped the version to support WP 3.2.1
  • New pot file


  • Upped the CC versions from 2.5 to 3.0
  • Better licensing code – PD license displays correctly now


  • Changed abbr ESBN to ESN in the install section and description due to Copyright issues


  • added bug reporting link under the settings section


  • new URI’s
  • added screen shot


  • Code re-write to support wp 3.x


  • original code by – Cal Evans