UnderHost
Domain Health

Domain Health Checker

Review the DNS and registry signals that keep a domain reachable and trustworthy.

DNS records
RDAP status
CAA
DNSSEC

Reachability

Check A, AAAA, and nameserver signals.

Mail status

See if the domain has MX records configured.

Registry data

Pull public RDAP status and expiry when available.

Tool guide

What the Domain Health score means

The domain health check combines DNS and registry signals into a practical snapshot of whether a domain is reachable, secure, and ready for hosting.

What this tool does

It reviews A/AAAA records, nameservers, MX records, CAA, DNSSEC DS signals, RDAP status, and expiry information when available.

Who it helps

  • Domain owners checking renewal and DNS health
  • Hosting customers preparing a move
  • Support teams triaging domain-level incidents

Usage instructions

Enter the root domain and review both the summary score and the detailed health signals.

Understanding the output

A lower score does not always mean a domain is broken. It means important signals are missing, unavailable, or worth confirming before a launch or migration.

Why it matters for hosting

Domains sit upstream of hosting. If nameservers, expiry, SSL authorization, or mail records are wrong, even a healthy server can appear offline.