.SE & .NU Registry
Scheduled for Dec 11, 20:00 UTC  -  Dec 12, 01:00 UTC
During this scheduled system maintenance by the registry, 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:
Posted Oct 10, 2019 - 13:39 UTC
This scheduled maintenance affects: Domain Services (Other gTLDs).