Hello everyone.
I have a curious question that has been bothering me for quite some time, and I would appreciate your patience as I am not well-versed in this area. Here's the scenario: I registered a domain and connected it to the DNS servers of a shared hosting provider.

My plan was to launch the website and make it visible on the internet. However, what if someone else linked the same domain to their account with the hosting provider? Would this mean that the domain is no longer under my control? In such a situation, what steps can be taken?
While I realize that this is unlikely to happen, I am still interested in knowing more about it.

The ownership of your domain depends on your registrar's perception of your ownership, meaning that the domain will remain yours as long as it is associated with your account with the registrar, rather than with the host. This enables you to host your domain wherever you prefer.

As long as you make timely payments to the registrar (generally an annual fee), the domain will remain under your ownership, unless the registrar goes out of business.

This situation may only arise in virtual web hosting when an extra IP address is obtained for the website. In such an event, the problem can be solved by carrying out these steps:
Navigate to the website directory and locate the .htaccess file. If it doesn't exist, create one. Edit this file and insert the following lines of code:

Options +FollowSymLinks
RewriteEngine On
RewriteCond %{HTTP_HOST} !^site\.com$ [NC]
RewriteCond %{HTTP_HOST} !^(.*)\.site\.com$ [NC]
RewriteRule ^(.*)$ http://ya\.com/$1 [R=410,L]
Here:
site.com refers to your website's name. Note that the forward slash preceding the domain zone is crucial.
ya.com is a website to which someone else's domain (any domain other than yours) will link. You can specify any other website on the Internet as your target.

If you have a VPS or dedicated server, the quickest approach is to set the default domain. Refer to this link on how to do that.

If you lack an ISPmanager control panel and possess sufficient Linux skills, you can register the first VirtualHost for the required IP address in any placeholder page in the Apache configuration file. For example:

<VirtualHost 123.123.123.123:80 >
        ServerName default.com
        dоcumentRoot /var/www/default
</VirtualHost>
Here:
123.123.123.123 is your website's IP address;
:80 is the Apache port number; it could differ if you installed a frontend server;
/var/www/default references the directory where stub files are located.

Ensure that this VirtualHost is placed before all others.

The domain registrar, the guy who sold you the land, keeps records of who owns what. So, unless you've been scammed or forgot to renew your domain (which, by the way, would be a rookie mistake), nobody can just waltz in and claim your domain.

Now, you've connected your domain to a shared hosting provider's DNS servers. That's like building a house on your plot of land. The hosting provider is giving you space to put your website. But here's where you might be getting confused. Just because someone else has an account with the same hosting provider doesn't mean they can claim your domain or your website.

Think of it like this: You and your neighbor both live in the same street, but that doesn't mean you can just walk into their house and kick them out, right? Same thing here. Your neighbor might have an account with the same hosting provider, but they can't just take over your domain or your website.

But let's say, for argument's sake, that someone tries to pull a stunt like that. Here's what you do:

Check Your Domain Registrar: Log in to your account with the domain registrar. If your domain is still registered to you, then nobody can do anything about it. Period.

Contact Your Hosting Provider: If someone's trying to cause trouble, your hosting provider should be able to help. They can check their records and confirm that your domain is connected to your account.

Legal Action: If someone's seriously trying to steal your domain, you might need to get legal. There are laws in place to protect domain owners. But let's not get ahead of ourselves, this is extremely unlikely to happen.

Now, let me address the elephant in the room. You're worried about this happening, but let me tell you, it's like worrying about a meteor strike while you're driving. It's possible, but it's not something you should be losing sleep over. Focus on building your website, not on imaginary threats.

And one more thing, while we're at it. Stop using shared hosting. It's like living in a cramped apartment when you could have a nice house. Upgrade to a VPS or a dedicated server. It's worth it, trust me. But that's a conversation for another time.