Only named lists ("Custom List Name") that have completed at least one run get history. Snapshots are taken automatically on each completed run, at most once per hour per list.
Public index lists (Fortune 1000, FTSE250, etc.) are shown by default. Custom-named lists can reveal confidential prospect/client names, so they're hidden until unlocked.
RUA vendor labels reflect the inline vendor mapping in job_tick.php/job_worker.php as it was at the time of each run. A same-day shift across many unrelated domains more likely means that mapping was edited than a real DMARC-vendor migration. "No RUA / no DMARC" can include a transient DNS hiccup on that run, not just a domain that actually dropped DMARC.
RUA vendor flow — (From → To)
Net change (gainers/losers) —
Total domains gained minus lost per RUA vendor between the two runs — unaffected by "Show moved only".