I just tried to check whois details for a .org domain and it seems that the .org whois server is down and is not responding.
A whois search at PIR, the .org registry, whois search webpage at http://pir.org/services/whois/ returns an error:
Error: No results retrieved from whois2.publicinterestregistry.net server for ******.org domain!
Other online whois services return similar errors:
Connect failed to: org.whois-servers.net
A whois search for the domain name pir.org at DomainTools.com provided a cached whois record and an error message:
Viewing a cached Whois record The Whois registry responsible for this domain name did not provide a valid Whois record. The cached record shown here was current on 01/11/2014. Please check back later for any updates.