Local broadcaster SBS aired an interview last month with the owner of the phone number, who they identified as Kim Gil-young, a woman who runs a business in the southeastern county of Seongju. The woman showed some of the messages she had received, including requests for invitations to join the Squid Game and go "from rags to riches".
Reuters' calls to the phone number were not answered on Wednesday.
"Together with the production company, we are working to resolve this matter, including editing scenes with phone numbers where necessary," Netflix said on Wednesday, asking fans to refrain from prank calls or messages.