The .ORG Registry has announced the following downtime:

During the above maintenance window, you would not be able to Register, Renew, Transfer, Manage .ORG domain names with BigRock.com.

This outage shall have no impact on the resolution/working of your already registered domain names. Please feel free to get in touch with our Support Team at http://support.bigrock.com, in case of any queries/doubts.