Visit our Osclass location repository.
Pick your country and click on it.
Right-click and click "Save as".
Save as file-name.SQL.
Visit our yoursite.com/oc-admin/index.php?page=tools&action=import
Select your .SQL location file.
In case you get a fatal or timeout error, you probably need to increase your max_execution_time in php.ini.
This process is varies from hosting to hosting, but generally you want to open cPanel, go to php.ini editor and change max_execution_time to 0.