How to access Domain Management?
Your domain name can be managed via Customer Portal at https://portal.ipserverone.com. Once login, click on Domain under My Services, click on View for the domain name you wish to amend the details and click on Manage. From here you may change the Name Server and Whois Details. You may refer this guide for reference: https://www.ipserverone.info/knowledge-base/how-to-view-and-update-domain-whois-information-through-customer-portal/
For TLD’s domain, it also can be managed via Registrant (WEBNIC) management portal at https://wam.manage.name/