Free DNS checker
Delegation, hygiene, email auth records, and related public DNS signals in one pass.
DNS problems cause outages, spoofed mail, and certificate failures. RedScore checks the public DNS posture around your domain from the outside. Go to /lookup, enter your hostname, and get grades plus fix-first guidance.
Scan your domainFree scan · No signup · Results in ~60 seconds · Opens /lookup
example-corp.com
✓ scan complete · grade D · 4 issues
AI summary
DMARC enforcement is missing, which leaves spoofing open. SPF is too permissive. Several key web security headers are absent.
Why DNS checks matter
Dangling records, weak delegation, and missing email auth are visible to anyone who looks. RedScore surfaces those public DNS gaps so you fix them before deliverability or security reviews stall.
Built for operators
One /lookup scan covers DNS plus TLS, headers, exposure, and reputation.
NS consistency, wildcard signals, and common public DNS misconfigurations.
SPF, DMARC, and related signals tied to the same domain.
Public DNSSEC posture where visible from the outside.
See what failed, why it matters, and what to tackle first.
What you get
RedScore returns a 0-100 RedScore with a DNS category grade and a prioritized summary across your full public footprint.
63 / 100
Grade C
example-corp.com
AI summary
Cookie settings are weak and server headers reveal stack details. Email spoofing is plausible with incomplete SPF and DMARC.
What RedScore checks today
This is not authoritative DNS hosting management or an internal resolver audit. It checks public DNS signals visible from the internet.
After the free scan
Free scans show grades and safe summaries. Claim the domain to unlock record-level detail, scheduled rescans, and change alerts.
FAQ
