How to monitor DNS changes over time?

DNS change monitoring strategies:

Commercial services:

DNS Spy - tracks changes, alerts on modifications

Datadog DNS monitoring - enterprise-grade tracking

Uptimerobot - DNS monitoring with alerts

DIY monitoring:

Script to query and log records periodically

Compare current to previous values

Alert on differences

What to monitor:

SPF record (unauthorized changes)

MX records (mail routing hijacking)

DKIM selectors (key changes)

DMARC policy (policy weakening)

Unexpected DNS changes can indicate compromise or accidental modification. Early detection prevents damage.

Registry watchdog service. Know immediately when your filed documents change.