To add approximately 30 third-level domains to the level 2 website hosted on host-ed.net, you can overcome the hosting restriction of having only one subdomain of the third level by using .htaccess. The steps to implement this are as follows:

1. Enable RewriteEngine by adding "RewriteEngine on" to the .htaccess file.
2. Set the base URL for rewriting rules using "RewriteBase /".
3. Apply the following conditions:
   - If the HTTP_HOST does not start with "www.site.com", proceed to the next condition.
   - If the HTTP_HOST matches the pattern of either "www." followed by any characters and then ".site.com", proceed to the next condition.
   - If the REQUEST_URI doesn't contain "public_html/", proceed to the next condition.
4. Apply the rewrite rule: redirect all requests matching the pattern "^(.*)$" to the directory "public_html/%2/$1".

After implementing these steps, I moved the "region" folder into the "public_html" folder. However, when I click on the link "region.site.com," an error occurs. Could you please advise me on how to resolve this issue?

there are other ways to add third-level domains to your website. Here are a few alternative approaches:

1. Subdomain Configuration in Hosting Control Panel: Check if your hosting provider offers a control panel where you can configure subdomains directly. Look for options like "Subdomains" or "DNS Management" in the control panel. You may be able to add and manage third-level domains from there.

2. Virtual Host Configuration: If you have access to the server's configuration files, you can set up virtual hosts to handle third-level domains. This involves creating separate virtual host configurations for each subdomain, specifying the dоcument root directory and other settings accordingly.

3. Content Management Systems (CMS): If you're using a CMS like WordPress or Drupal, they often provide built-in functionality for managing subdomains. You may need to install a plugin or module specific to your CMS that enables subdomain management.

4. Domain Registrar Settings: Depending on your domain registrar, you may be able to configure third-level domains through their DNS management interface. Look for options to create or edit DNS records and add subdomains there.

Here are more details on configuring virtual hosts to add third-level domains:

1. Locate the virtual host configuration files: The location of these files can vary depending on your server setup. Common paths include `/etc/apache2/sites-available` for Apache on Linux or macOS, or `C:\xampp\apache\conf\extra` for XAMPP on Windows. Look for files with names like `example.com.conf` or `yourdomain.conf`.

2. Create a new virtual host configuration file: Copy an existing configuration file and give it a unique name that reflects the third-level domain you want to add. For example, if you have an existing `example.com` virtual host, you can create a new file named `sub.example.com.conf`.

3. Edit the new virtual host configuration file: Open the newly created file and modify the necessary settings:
  - Set the `ServerName` directive to the intended third-level domain, like `ServerName sub.example.com`.
  - Define the dоcument root directory using the `dоcumentRoot` directive, such as `dоcumentRoot /var/www/sub.example.com/public_html`.
  - Customize other options as needed, like log paths, aliases, or SSL configurations.

4. Save the changes and exit the file.

5. Enable the new virtual host configuration: Run a command to enable the new virtual host. For Apache on Linux, this is usually done using the `a2ensite` command, such as `sudo a2ensite sub.example.com.conf`. On Windows with XAMPP, you may need to edit the `httpd.conf` file and uncomment the line `Include conf/extra/httpd-vhosts.conf`.

6. Restart the web server: To apply the changes, restart the web server using the appropriate command for your system. This could be `sudo systemctl restart apache2` for Apache on Linux, or clicking the "Restart" button in the XAMPP control panel on Windows.

After following these steps, the third-level domain should be configured and accessible. Remember, you'll also need to configure DNS records for the third-level domain to point to the server's IP address or CNAME.

You can't rely solely on .htaccess for this. To achieve your goal, you require assistance from your provider to set up a wildcard for a third-level domain. Unfortunately, it seems unlikely that they will be willing to do so.

Absolutely noway. In order for the third-level domain to function properly, a DNS record is necessary.