DNS monitoring
DNS monitoring that catches a hijacked domain
Monitorizer reads your domain's records and alerts you the moment one changes: a hijacked domain, a wrong edit at the registrar or a mail record that disappeared.
- A, AAAA, MX, TXT, NS, CNAME
- Read over encrypted DNS
- Accept planned changes in one click
Know when your DNS changes, and what changed
DNS problems are silent: the site still loads for some people, mail slowly goes to spam. An alert on any change turns them into something you can fix the same day.
The records that matter
A, AAAA, MX, TXT, NS and CNAME. Pick the ones to watch on each domain.
Clear change alerts
The first answer becomes the reference. Any difference is reported as “Changed: new (was old)” until you accept it.
Not fooled by caches
Records are read over encrypted DNS (Cloudflare DNS over HTTPS), so a local cache does not hide a change.
Missing domains
A domain that stops existing (NXDOMAIN) is reported at once.
Why watch DNS
Stop domain hijacking early
Watch NS on every domain you own: a changed name server is the first sign of a hijacked domain.
Keep email out of spam
Watch MX and TXT on the domain you send from: a lost SPF or DKIM record sends your mail to spam.
Catch the wrong edit
A teammate, a client or a registrar change touches the wrong record: you hear about it before the site or mail breaks.
Set up in three steps
- 1
Enter the domain
Just the name, such as example.com.
- 2
Pick the records
A, MX and NS are selected by default. Add TXT for SPF and DKIM.
- 3
Accept planned changes
When you change your DNS on purpose, accept the new records in one click.
Every setting, status and tip is in the guide. Open the full guide
Questions
How often are DNS records checked?
Every 15 minutes by default, since records rarely change. You can choose a shorter interval.
My records rotate between several IP addresses.
Some providers answer with changing addresses. Watch NS and MX on that domain instead of A.
Can it watch SPF, DKIM and DMARC?
Yes. They are TXT records: watch TXT on the domain (and on the selector or _dmarc name) to be alerted when one changes or disappears.
Watch the rest of your stack
One app, six kinds of monitors, the same alerts and dashboard for all of them.
- Website monitoringUptime, speed, SSL and hack alerts.
- Status page monitoringKnow when OpenAI, Cloudflare or GitHub is down.
- Server monitoringDisk, memory and services over SSH, no agent.
- Cron job monitoringAlerts when a backup or scheduled job does not run.
- Port monitoringMail, database, SSH and any TCP service.
Be the first to know when your DNS changes
Create your free account in a minute and add your first monitor. Nothing to install on your servers.