: no one knows the exact answer. There is
no one entity in charge
of the Internet as a whole;
address space is registered by large ISPs which then disseminate it to
smaller ISPs and other companies. However, the
Google search engine
considered the most effective as of this writing, currently claims to
index over three billion web pages. Assuming for a moment that the
average website has 50 indexable web pages and that Google indexes
two-thirds of the websites that exist, there are roughly
40 million websites in the world. Most estimates put the number
of individual users with Internet access at around 300 million, with
the largest concentrations in the United States, Europe, and
parts of Asia.
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