The Diablo 2 Wiki
The Diablo 2 Wiki archive is available for anyone looking for information on Diablo 2. All information here is pre-D2R but contains a lot of useful information that is still relevant. Updated sections for new D2R features can be found on the PureDiablo Diablo 2 section

Missing number

From Diablo 2 Wiki

The missing number you have noticed can easily be filled out by going back to the article you were viewing, edit the page and add it there if you know it.

The wiki is dependant on user contribution, and this is a perfect opportunity for you to give somethign back to the rest of the community!

The number should be fairly easy to edit, but if you want to help with other things, you can always check out the Help section.