Yes, you can change your Domain Name Server and contact information at any time after registration, through client control panel.
Go to Hosting.India.to client area login:
https://hosting.india.to/clients/clientarea.php
- Click "Domains"
- Click on your desired "Domain Name"
- Here you will find all the details for domain modification on the left side under "MANAGE" tab.
NOTE : From 1st DEC 2016 Domain registry sends a approval mail to the registered admin Email address of the domain if you want to change contact information of domain for .COM, .NET, .ORG, .INFO, .BIZ etc.