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I wanted a list of sub-domains of Stack Exchange that are not mentioned over here https://stackexchange.com/sites

Some of the sub-domains I found which were not mentioned are

Are there any other which are not mentioned?


Mentions by Shadow Wizard, iBug, Glorfindel


Other mentions below which are not mentioned in "All Sites" but are mentioned in the drop down menu on the top left of the Stack Exchange website

Any other website that's left out ?

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  • @ShadowWizard it seems spam to me , because my firefox gave an exception opening this website indicating the website's certificate is not valid. After I added it to exception, it showed me the stackexchange.com webpage on which I was not logged in however my session cookies are still in the browser and I am logged in on other tabs in the browser. Aug 6 '17 at 10:26
  • Yes this is the development "playground", it's not really meant to be viewed by non-developers. Aug 6 '17 at 10:29
  • @ShadowWizard okay, any other subdomain left out? Are you sure, this is it, that there are no other non-listed subdomains left ? Aug 6 '17 at 10:32
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    Not sure, that's why just a comment. Aug 6 '17 at 10:35
  • @ShadowWizard urrm, why is the list here different from the one here?
    – ItamarG3
    Aug 6 '17 at 10:50
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    @ItamarG3 different database probably, it doesn't work with the production database but with their dev database. Aug 6 '17 at 10:51
  • @ShadowWizard SO isn't on that db XD. probably due to the high traffic
    – ItamarG3
    Aug 6 '17 at 10:53
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    Just a notice. CS50 isn't available from top-left dropdown. Only A51 and SA do. Aug 6 '17 at 13:14
  • Area 51 and StackApps are mentioned on All Sites. How do I access this drop down menu?
    – gerrit
    Jan 21 '20 at 13:09
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All sites that are not actual Q/A sites are not listed.

Strictly speaking, Area 51 is not in the list, but it's easily known and accessible (it's in the top-left dropdown menu of all sites, though).

Other (sub)domains of Stack Overflow:

Other apex domains that the Stack Exchange company owns:

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In addition to the sites mentioned by iBug, we have:

  • Area 51 (it's linked to at the bottom of the list, but it's not in the list)
  • Stack Exchange API
  • The various Winter Bash sites:
  • CS50 (a Q&A site for Harvard University's CS50x course)
  • We used to have elections.stackexchange.com but it's currently down.
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