In case the IPs of the name servers are changed, you will be notified by us in order to update the records for the name servers at your domain registrar (e.g Godaddy)
It is possible that some WHOIS services do not display the updated IPs and that can be caused by improper updates made at the respective registrar or by the fact that the data displayed in the WHOIS query was not updated (It may take up to 72 hours for that data to be updated)
This issue can be fixed by re-entering the provided details at your registrar or by contacting your domain registrar and notifying them that the data in WHOIS is not updated properly.