WHOIS Lookup

Check domain registration, SSL certificates, DNS records, HTTP headers, redirect chains, website technologies, and hosting information - all in one place.

Enter a domain name without http:// or www.

WHOIS DNS SSL Headers Tech
Looking up domain information...
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How It Works

  1. Enter a domain name in the search box above (e.g., example.com).
  2. Click the search button or press Enter to start the comprehensive lookup.
  3. View detailed results across 8 categories: registration info, SSL, DNS, HTTP headers, redirect chain, technologies, hosting, and reverse IP.
  4. Export results as JSON or CSV, share a link, or print the report.

Tip: Use the Bulk Lookup tab to check up to 5 domains at once and compare them side by side.

Everything This Tool Checks

Registration Info

Domain registrar, creation date, expiration date, DNSSEC status, and domain age calculation.

SSL Certificate

Certificate validity, issuer, expiration, and days remaining. Pair with our Password Generator for full security.

HTTP Headers

Full response headers including security headers (HSTS, CSP, X-Frame-Options), caching, and server configuration.

Redirect Chain

Trace every redirect hop from the original URL to the final destination with status codes and timing.

Technology Detection

Detect CMS (WordPress, Shopify), frameworks (React, Vue), servers, CDNs, analytics, and security features.

Hosting & Reverse IP

IP address, ISP, location, and other domains on the same server. Use IP Location Checker for more detail.

Common Use Cases

This all-in-one domain intelligence tool serves SEO professionals assessing competitor websites, security researchers verifying SSL certificates and tracing redirect chains, developers troubleshooting DNS configurations and email authentication (SPF, DKIM, DMARC), and business owners checking domain expiration dates or discovering competitor technology stacks. The HTTP headers viewer helps audit security configurations, while reverse IP lookup reveals shared hosting neighbors. You can also use our Sitemap Generator to map site structure, Broken Link Checker to find dead links, or JS/CSS Minifier to optimize web assets.

Frequently Asked Questions

WHOIS is a query protocol used to look up information about domain name registrations. It provides details about who owns a domain, when it was registered, when it expires, and the nameservers associated with it. Our tool uses the modern RDAP protocol first for faster, more structured results, with a fallback to traditional WHOIS servers.

Due to privacy regulations like GDPR and ICANN's Temporary Specification, many registrars now redact personal information from WHOIS records. This includes the registrant's name, email, phone number, and address. Only essential technical details remain publicly available.

The technology detection analyzes HTTP headers and page source to identify CMS platforms (WordPress, Joomla, Drupal, Shopify, Wix, Squarespace), JavaScript frameworks (React, Vue.js, Angular, Next.js, jQuery), web servers (Nginx, Apache, LiteSpeed), CDN providers (Cloudflare), hosting platforms (Vercel, AWS), analytics tools (Google Analytics, Tag Manager, Meta Pixel, Hotjar), CSS frameworks (Bootstrap, Tailwind), and security headers (HSTS, CSP).

The redirect chain checker traces every HTTP redirect from the initial URL to the final destination. It shows each hop's URL, HTTP status code (301, 302, etc.), and response time. This is valuable for diagnosing redirect loops, unnecessary hops that slow page loading, and verifying HTTP-to-HTTPS redirects.

Reverse IP lookup finds other domain names hosted on the same IP address. This reveals shared hosting neighbors and is useful for security research, competitive analysis, or verifying if a site uses shared or dedicated hosting.

Yes, all 8 check categories are completely free with no registration required. You can also export results as JSON or CSV for further analysis.