If your domain is currently pointing to Hostinger and fully propagated, you can easily reset the DNS domain zone from hPanel.
Resetting the DNS zone will revert to the default values for all records. This can be helpful in some cases, such as a stuck propagation or when you want to make sure your domain has all the record values needed to work with your Hostinger hosting account.
There are two ways to access your domain’s DNS zone from hPanel:
Domain registered at Hostinger
Go to the Domains section on the top bar of hPanel and click on the desired domain:
On the left menu, head to the DNS/Nameservers subsection:
Once on the DNS Zone, scroll down to the bottom of the page and click on Reset DNS Records:
A confirmation message will appear, just click on Reset to proceed.
NOTE:
Any change to your domain's DNS zone needs 24 hours to fully propagate worldwide
Domain added to the Hosting account
Go to Websites → Manage of the desired domain, search for DNS Zone Editor and click on it:
Once on the DNS Zone, scroll down to the bottom of the page and click on Reset DNS Records:
A confirmation message will appear, just click on Reset to proceed.
NOTE:
Any change to your domain's DNS zone needs 24 hours to fully propagate worldwide