You can use Hostinger services with any domain you own, even if it's not registered at Hostinger.
In this case, you have two options:
Point your domain to Hostinger by changing its nameservers.
This way, you will be able to manage the DNS zone in Hostinger and keep the domain registration management, such as contact details and domain renewals, at your current domain service provider.
Transfer your domain to Hostinger to have all your services in one place for easier management.
Once you add an external domain to your hosting plan, it will appear in your hPanel's Domains section.
Some TLDs may not be available for transfer. In that case, you can still use your domain at Hostinger by pointing it to our servers.
After you specify the new DNS records, propagation will start, which can take up to 24 hours to complete 💡