Linkedin is a social Media website for Professional People.
It does not list South Korea phonenumbers like historic Whitepages
but profiles of individual people.
Connected to Linkedin you can send messages
to people from South Korea you found.
Linkedin was acquired by Microsoft.
As of 2020 August 2.859.000 people from South Korea
are connected to Linkedin.
More on the history of Microsoft
on the Brand Portal VB.com