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SAN FRANCISCO — Donald Trump's alleged cell phone number, social security number and address were among personal details published Thursday by a hacker claiming to be part of the Anonymous hacking collective.

Many of of those details — such as the cell phone number and management agency — have been previously published online. A call to that number went unanswered, and it was unclear if the social security card number belonged to Trump.

A Twitter account associated with Anonymous tweeted triumphantly that the attack was a harbinger of what's to come.

Anonymous declared a "war on Trump" nearly two weeks ago, telling its supporters to focus their attacks on April 1. Trump's personal datas were published Thursday in a video featuring a digitally-altered voice.

"To show that we are very serious about stopping any proposed forthright by the fascist Donald Trump we have attached a gift of sorts," says the narrator in the video. "Trump's Social Security number, cell phone number and other details that might be able to assist you."

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Those aligning themselves with Anonymous, however, seemed split on the anti-Trump campaign, with some arguing in #OpTrump chat rooms that even if they disliked Trump's campaign, they believed that freedom of speech was more important and that the Republican front runner had a right to his views.

Others asked if it was possible for Anonymous to realistically affect Trump's campaign.

A Trump spokesperson did not immediately respond to a request for comment.

Trump's website survived Distributed Denial of Service (DDoS) attacks in December.