Domain Name Contacts are of the following types:
Registrant Contact Details
Admin Contact Details
Technical Contact Details
Billing Contact Details
To Modify WHOIS Details for a Domain Name
1) Login to your domain control panel.
2) From the top menu, click the ‘Manage Orders‘ tab, and select ‘List/Search Orders‘.
3) Click on the domain name you wish to modify whois details for.
5) Click on ‘Contact Details’
6) Then Modify the details and click the ‘Save Contact Details’
You may choose to use the the Registrant Contact Details for the Administrative, Billing & Technical Contact Details by selecting the Use same contact for Administrative, Billing and Technical details checkbox.