DNSnexus centralizes tool execution, educational guidance, and shareable result URLs so teams can debug faster without account friction.
Each category page groups focused tools so operators can move from broad checks to specific root-cause validation.
Propagation checks, record lookups, DNSSEC validation, and ownership context for domain operations.
SPF, DKIM, DMARC, MX, SMTP, compliance, and reporting checks for sender trust.
Route, ownership, address planning, and path diagnostics for infrastructure troubleshooting.
Header inspection, redirects, crawlability signals, and link structure analysis.
TLS, DNS, email, and website posture checks with guided hardening workflows.
Quick geolocation and network ownership context for incident and abuse triage.
Guided sequences map common operational goals to ordered tool runs and outcomes.
Confirm authoritative records, monitor propagation spread, and verify final resolver behavior.
Validate auth records, inspect policy alignment, and check blacklist/compliance indicators.
Verify certificate validity and confirm external service ports are correctly exposed.
Inspect canonical signals, redirect paths, headers, and on-page link architecture.
Measure reachability, path behavior, and ownership context while isolating faults.
Guides explain implementation choices, failure modes, and verification strategy for recurring infra tasks.
Browse all guides→Use this decision matrix to choose the right DNS tool based on your immediate objective, required input, and expected output.
| Tool | Best for | Input | Output | Next tool |
|---|---|---|---|---|
| DNS Lookup | Inspecting current record answers for a specific hostname. | Domain/host | A, AAAA, CNAME, MX, TXT, NS, SOA answers | DNS Propagation Checker |
| DNS Check | Running broad DNS health validation before/after changes. | Domain | Record coverage summary and consistency checks | NS Lookup |
| DNS Propagation Checker | Measuring global resolver spread after DNS updates. | Domain + record type | Per-region answer variance and cache state | DNS Lookup |
| NS Lookup | Confirming authoritative nameserver delegation. | Domain | Authoritative NS set | WHOIS Lookup |
| WHOIS Lookup | Checking registrar and registration ownership metadata. | Domain | Registrar/registration profile | DNS Check |
Every section balances actionable checks with transparent constraints so engineers can use outputs confidently in real incidents.
Every check surfaces what can be validated from browser-safe signals vs resolver/provider-dependent data.
Each tool page combines first-fold execution, how-to guidance, and open FAQ content for operators and crawlers.
Results are formatted for quick scanning, with structured follow-up paths to related tools and workflows.
Core checks are available without signup to minimize friction during migrations and outage response.
This section is intentionally open and fully rendered so users and crawlers can read the complete context.
Start with the directory, jump into a workflow path, or open guide-driven diagnostics based on your current operational objective.