TikTok has warned users in the US that the app is "temporarily unavailable".
"We regret that the law banning TikTok will go into effect on January 19 and force us to make our services temporarily unavailable," the notice to US users who open the platform reads.
"We are working to restore our services in the US as soon as possible, and appreciate your support. Please stay tuned," the message added.
The U.S. Supreme Court upheld the law that bans TikTok unless its Chinese owners reach an agreement to sell it to non-Chinese buyers.
Just months after overwhelmingly supporting the law, lawmakers and officials are now wary of the ban, with everyone waiting to see if Trump can step in and find a way to save the app.
From teenage dancers to grandmothers sharing cooking tips, TikTok has gained immense popularity for its ability to turn ordinary users into global celebrities.
The social network also has a fan in Trump, who believes the app has connected him with younger voters and contributed to his election victory in November.
After discussing TikTok with Chinese President Xi Jinping, Trump told NBC News he may activate a 90-day reprieve on the ban once he returns to the Oval Office.
"I think that would certainly be an option that we would look at. The ninety-day extension is something that will probably be done," he said.
The law requires Apple and Google to remove TikTok from their app stores, blocking new downloads. The companies could face penalties of up to $5,000 for each user who accesses the app.
Oracle, which hosts TikTok's servers, is also required to enforce the ban. | BGNES, AFP
