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About DNS Checker Online
This tool checks DNS records from multiple geographic locations simultaneously — typically dozens of DNS servers around the world. Each location reports back what it sees, letting you confirm that a DNS change has propagated worldwide.
When you update DNS records (changing a registrar, switching hosting, moving an MX record), the change takes minutes to hours to spread. Some resolvers update quickly; others cache aggressively. Checking from multiple vantage points reveals whether your update has reached all your users or only some.
Use it after migrating a site, when troubleshooting reports that some users can reach a service while others can't, or when validating a deployment that depends on a DNS change.
How to use this tool
How to audit DNS configuration
Enter the domain
Type the domain into the "Hostname or domain" field. Same record set as DNS lookup (NS, SOA, MX, A, AAAA, CNAME, TXT, CAA, SRV, NAPTR) plus automated diagnostics.
What it actually checks
Beyond raw records, the tool also pulls DMARC TXT (when the domain has MX) and runs configuration checks — broken delegation, missing SPF, no DMARC, weak TLS pointers, etc.
Press Run
Result returns the full record set plus three diagnostic arrays: errors (must-fix), warnings (should-fix), and verifications (informational "this looked right").
Read sectionDiagnostics
Each section (NS, MX, TXT, etc.) carries its own diagnostics. Fix errors first, then warnings — verifications are confirmation that the corresponding subsystem looks healthy.