If your domain is registered with Indoreg, you can access your DNS Zone from your Registered Domain → Setting → Domain Information section.
You can find a detailed tutorial on changing nameservers at Indoreg here: Tutorial Setting Name Server.
Hostinger default DNS records:
If you face any difficulties while managing DNS Zone at your domain provider, it’s best to contact Indoreg directly. Alternatively, you can transfer your domain to Hostinger so your hosting and domain will be managed from one place 😊