DNS Checks
Checks & Monitoring
Updated Apr 2, 2026
DNS checks monitor your domain's DNS records and alert you when they change unexpectedly.
Configuration
| Field | Description |
|---|---|
| Hostname | The domain to query (e.g. example.com). Do not include http://. |
| Record Type | A, AAAA, CNAME, MX, TXT, NS, or SOA. |
| Expected Result | The expected DNS response value. If it changes, the check is marked down. |
| Interval | 15m, 1h, 2h, 3h, 6h, 12h or 24h (DNS records change infrequently). |
DNS snapshots
Every DNS lookup result is stored as a snapshot. You can review the history of DNS responses over time from the check detail page. This is invaluable for auditing unexpected changes or tracking DNS propagation.
Use cases
- Detect DNS hijacking or unauthorized record changes.
- Monitor MX records to ensure mail delivery is correctly routed.
- Track TXT records for SPF/DKIM/DMARC compliance.
- Verify CNAME or A record changes propagate after infrastructure migrations.