Domain and DNS Monitoring to Prevent Sudden Outages

Many outages are not hosting failures. They are domain or DNS issues that make your site unreachable even if servers are healthy.

Use this checklist to keep your domain and DNS stable.

Quick list of key points

• Monitor domain expiration
• Watch for nameserver changes
• Check critical DNS records
• Validate redirects
• Lock down registrar access
• Test from multiple locations

Monitor domain expiration

Set reminders well before renewal dates and confirm your payment method is current.

Watch for nameserver changes

Unexpected nameserver updates can break your site instantly. Alert on any change.

Check critical DNS records

Monitor A, AAAA, CNAME, and TXT records that route traffic or verify services.

Validate redirects

If your domain redirects to another URL, make sure it always resolves correctly.

Lock down registrar access

Enable two-factor authentication to prevent accidental or malicious domain changes.

Test from multiple locations

DNS propagation can vary by region. Multi-location checks help confirm global availability.