Web hosts have varying requirements about the number of sub-domains allowed. Naturally, the more that you have, the more bandwidth that is used, so it’s often the case that lower-fee charging hosts will limit the number of sub-domains allowed on the one account. Having backup facilities in place that have already been tested means you can easily transfer a major web site to another web host if required. A temporary or permanent change can be made in the few minutes it takes to redirect the domain. There are two special matters to consider at the very outset: The number of sub-domains allowed and the number of domains allowed on the one account.

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