You can also connect to

Linkedin is a social Media website for Professional People.
It does not list Estonian phonenumbers like historic Whitepages
but profiles of individual people.

Connected to Linkedin you can send messages
to people from Estonia you found.

2016 Linkedin was acquired by Microsoft.

As of 2020 August 244.000 people from Estonia
are connected to Linkedin.

More on the history of Microsoft
on the Brand Portal