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If I own a domain (, what are the theoretical and practical limits on the number of sub-domains I can create (eg,

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marked as duplicate by Simon Hayter, Stephen Ostermiller, John Conde Mar 13 '13 at 2:56

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up vote 4 down vote accepted

I think it's unlimited. For example, you can see

When you create an account, you have your pseudo as a subdomain. And as you may know, Tumblr & Wordpress have a lot of members!

I found some interesting articles:

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