This is where you can find the latest .se and .nu zone files. The zone files are available through AXFR at zonedata.iis.se and here:
The zone content is (C) Copyright 2016 The Internet Foundation in Sweden. The license is Creative Commons Attribution 4.0 International.
For operational reasons we cannot provide DNS notify messages when a new zone has been published. The zones are updated every other hour independently. IIS offers this as a best effort service, but aim to have it available at all times with the latest available zone files. No guarantees.
If the service is abused or if the license terms are violated, we reserve the right to block the IP prefix that is the cause of the problem, and revoke your right to use the data. Check the SOA before fetching a new zone file to not make unnecessary zone transfers. IIS will assess any problems or abuses, and any decisions to block or revoke access remains solely the right of IIS. Contact us at firstname.lastname@example.org before any experiments, we will be happy to discuss your issues.
More information about generic access to the zone file can be found here.