The Internet Archive - or someone availing themselves of its services - appears to have been preserving snapshots of Assange's account once every hour since September 18 of this year.
Julian Assange's Twitter account was the subject of speculation and conspiracy theories Christmas day.
The first post following the hiatus was an animated depiction of Santa Claus presumably writing down WikiLeaks under the "Good" section of his "naughty list".
Assange followed up with a promotional tweet, and a cute corgi, linking it to WikiLeak's donation page.
However, some users speculated that Assange was taken out by Twitter as part of the social media platform's recent purge of inflammatory posters, many on the far right, the report added.
Assange has since responded to the tweet with a tweet of his own.
Assange, who has been holed up in the Ecuadorian embassy in London since 2012 to avoid extradition to avoid a rape accusation from Swedish prosecutors, has long used the social media site to communicate WikiLeaks plans. A similar incident happened last November when US President Donald Trump's Twitter account also momentarily vanished. There was no confirmation that Assange authored the alternative account and it was later suspended by Twitter.
Those with secrets want him alive, if he dies the real dirt is released.
"It appears Julian Assange's wasn't suspended by twitter but was hacked and deleted", one Twitter user wrote, but no evidence was supplied to back the claim.