The scheduled maintenance has been completed.

Scheduled maintenance is currently in progress. We will provide updates as necessary.

Neustar will be performing some Narwhal Production Service Upgrades

the following services may be unavailable:

Availability Checks
Whois Services
Domain Purchases
Domain Renewals
Domain Updates

For a list of affected TLD's, please look the registry up in the following spreadsheet:
http://opensrs.help/chart