Today searching for jquery dynatree slow in IE lead to a result from http://facebook.stackoverflow.com/. Checking further, this has all the facebook posts.

So, are there such more sub-domains? First I thought the top tags would be having this feature, just doesn't seems to be there as I tried http://java.stackoverflow.com which is not present.

I also envisaged that this might the featured/sponsored tag that get the sub-domain, but even that is not the case as per my observation for another sponsored tag android (http://android.stackoverflow.com).

I have been here for a year and never came across this site. I also don't see a link to this anywhere or a relevant blog post for this.

Would be great if someone could throw some light on this.


No, facebook.SO is the only one. It's due to the collaboration between SO and Facebook to create a better environment for FB API devs.

However, there are a lot of other stackexchange subdomain sites (including android.SE, but that's not about android coding). These are separate sites (unlike facebook.SO, which is just a tag-filtered version of Stack Overflow)

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