Zonedata for the domain name TLD:s .SE and .NU are completely open and freely available to the public. They can be transferred from zonedata.iis.se:
dig @zonedata.iis.se se AXFR > se.zone.txt dig @zonedata.iis.se nu AXFR > nu.zone.txt
More information available at: https://zonedata.iis.se/
With this free information, I created the site https://www.axfr.se. Where I present newly added .SE and .NU domains. All published diffs are compared with Zonedata from the previous day.