Created a subdomain via vhost in ubuntu for my apache server. Site can not be found

    <VirtualHost *:80>


ServerName jt2.telenec.de

ServerAdmin info@test.de


DocumentRoot /var/www/tele/

<Directory /var/www/tele/>

Options Indexes FollowSymLinks MultiViews

AllowOverride All

</Directory>

</VirtualHost>

This my .conf file. Its activated in /etc/apache2/sites-enabled

But when i type the url into the browser it says :"DNS_PROBE_FINISHED_NXDOMAIN"

How do I make my subdomain accessible?