DNS records
A, AAAA, MX, TXT, NS, and CNAME records with TTL values for operational checks.
Developer utility
DNS Lookup Tool
Check DNS records, email security, propagation, reverse DNS, and SSL/TLS details from one compact workflow.
What it checks
DNS and security signals in one pass
Query core DNS records, inspect mail authentication, review SSL certificate metadata, and optionally compare propagation across global resolvers.
Email security
SPF, DMARC, DKIM, MX provider detection, and a practical security score.
SSL and propagation
Certificate issuer, SANs, expiry reminders, reverse DNS, and global resolver consistency.
Use cases
Fast checks for DNS operations
Use the lookup when moving infrastructure, validating email delivery, investigating certificate expiry, or confirming DNS changes after a deployment.
DevOps
Verify hosting, CDN, nameserver, and load balancer records before and after changes.
Email delivery
Check MX routing and authentication records before tightening SPF or DMARC policies.
Incident response
Quickly separate DNS, certificate, and mail routing issues during outage triage.
FAQ
DNS lookup questions
What DNS records does this tool check?
The tool queries A, AAAA, MX, TXT, NS, and CNAME records. You can narrow record types in advanced options.
Can I check IP addresses?
Yes. The input accepts domains, IPv4 addresses, and IPv6 addresses. Reverse DNS can resolve IP addresses to hostnames.
How is the email security score calculated?
It evaluates SPF validity, DMARC policy strength, DKIM configuration, MX records, and related best-practice signals.
Is search history stored on your servers?
No. Search history is stored in browser localStorage and can be cleared from the history panel.