c.nic.feedback
c.nic.feedback has no DNS entries . The authorative whois server for the top level domain 'feedback' is whois.centralnic.com
DNS Records 
Updating...
Whois for nic.feedback
From server whois.centralnic.com 1 week, 6 days ago (None):
No whois information found
Ping
Updating...
Wikipedia
No information found
Search c.nic.feedback
HTTP Port 80 Reply
Updating...