About LDNS
A free, client-side DNS lookup and domain analysis tool that runs entirely in your browser.
Comprehensive Analysis
DNS records, RDAP queries, email configuration, and server information - all in one place.
Lightning Fast
Deployed on Cloudflare Pages for optimal performance from edge locations worldwide.
Modern Stack
Built with SvelteKit, TypeScript, and Tailwind CSS for a modern, maintainable codebase.
How to Use LDNS
DNS Lookups
Enter a domain name in the search bar on the homepage, or navigate directly to:
ldns.com/example.com This will show all DNS records including A, AAAA, MX, TXT, CNAME, and more.
You can also link directly to the DNS records section:
ldns.com/example.com#dns-records RDAP Queries
Get registration data and domain information by visiting:
ldns.com/example.com/rdap This shows registrar information, creation dates, and contact details.
You can also link directly to specific RDAP sections:
ldns.com/example.com/rdap#domain-info ldns.com/example.com/rdap#nameservers ldns.com/example.com/rdap#entities Email Configuration
Check email settings and security configurations at:
ldns.com/example.com/email View MX records, SPF, DKIM, DMARC policies, and email security analysis.
You can also link directly to specific sections:
ldns.com/example.com/email#summary ldns.com/example.com/email#spf ldns.com/example.com/email#dmarc ldns.com/example.com/email#mx Security Analysis
Comprehensive security analysis including SSL/TLS and email security:
ldns.com/example.com/security View security scores, SSL certificate analysis, and email security assessments.
You can also link directly to specific security sections:
ldns.com/example.com/security#domain-reputation ldns.com/example.com/security#ssl-security ldns.com/example.com/security#email-security