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Because authorities frequently block these sites, they often add numbers (like "73") to their URLs to create new mirrors and bypass restrictions.
The number in "73 Movierulz" refers to a specific proxy or mirror domain . Because internet service providers (ISPs) and government bodies frequently block these sites for copyright infringement, the operators constantly migrate their content to new URLs (like .vpn, .it, .st, or numbered prefixes) to stay ahead of the law. Why Do People Use It? 73 movierulz