Most .dk zones rarely change. This list shows the ones that change constantly, counted from the SOA serial changes our scanners record. Data comes from our own scanners, which re-resolve every .dk domain in the zone roughly once a week.
We only store a new full scan when a zone's SOA serial has changed since our last visit, i.e. its owner edited DNS (a few are forced rescans). These are the 200 zones with the most stored scans in the last 30 days: often dynamic DNS, ACME DNS-01 certificate renewals or automated deployments. A zone can't show more changes than we made visits, so the top of this list is zones that had changed at (almost) every visit, not a ranking of how often they change.