After a 24-hour blackout, Wikipedia has returned to full working order but declared: "We're not done yet."
The site had blocked its content for 24 hours in protest at proposed anti-piracy legislation in the US.
The encyclopaedia said the site had been viewed 162 million times, with eight million people following instructions to contact politicians.
The protest led to eight US lawmakers withdrawing their support for the proposed bills.
Two of the bill's co-sponsors, Marco Rubio from Florida and Roy Blunt from Missouri, are among those who have withdrawn their support after "legitimate concerns".
But backers of the legislation, led by the Motion Picture Association of America (MPAA), described the action as an "irresponsible" publicity "stunt".
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