Developer Utilities · Free tool
DNS Lookup
Query DNS records for any domain via Cloudflare's DNS-over-HTTPS endpoint. DNSSEC-validated, bypasses local caches.
Advertisement
What it does
Query DNS records for any domain — A, AAAA, MX, TXT, NS, CNAME, SOA, CAA, SRV, PTR. Uses Cloudflare's DNS-over-HTTPS endpoint (cloudflare-dns.com), so results are DNSSEC-validated and bypass any local resolver caching.
Handy for verifying email setup (MX, SPF, DKIM, DMARC), debugging website propagation after a DNS change, or confirming an SPF/CAA record landed correctly.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/dns-lookup" width="100%" height="720" frameborder="0" loading="lazy" title="DNS Lookup" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Type the domain (with or without https://).
- Pick a record type (A is the most common — IP address).
- Click Lookup. Results come back in under a second.
Advertisement
Learn more
Guides about this topic
- Using Our Tools · GuideHow to generate QR codesMake QR codes for URLs, WiFi, vCard, or text. Learn error correction and sizing, then generate your QR code online free with no sign-up in seconds.
- Using Our Tools · GuideHow to create a strong passwordGenerate a strong password instantly online for free. Build high-entropy passphrases following NIST 2026 rules with no download needed.
- Developers & Technical · GuideHow to encode and decode Base64Understand the 3-to-4 mechanic and 33% overhead for standard, URL-safe, and MIME Base64. Free online reference to avoid common mistakes, no download needed.
- Design & Media · GuideHow to choose a color paletteBuild accessible color palettes using HSL theory, monochromatic to triadic schemes, WCAG contrast checks, and dark mode tips. Free, no-download guide.
- Developers & Technical · GuideHow to use JWT tokens securelyImplement secure JWT authentication by choosing RS256, setting expiration, using httpOnly cookies, and preventing 'alg: none' attacks in your browser for free.
- Design & Media · GuideHow to design a faviconCreate favicons that render perfectly from 16×16 to 512×512 with dark mode support. Learn the right HTML tags and web manifest setup free online.
Explore more developer utilities tools
- Port Number LookupSearch over 140 well-known TCP and UDP ports by number or service name. Free online reference tool with no sign-up, covering web, mail, DNS, and more.
- Test Credit Card NumbersReference table of canonical test card numbers from Stripe, Adyen, and Braintree sandbox docs. Plus Luhn validator + network detector.
- IPv6 Expander & ShortenerFormat IPv6 addresses to canonical form, handling zone IDs and prefixes, instantly online—free tool with no registration required.
- Htpasswd GeneratorCreate .htpasswd lines for Apache or nginx basic auth with browser-only SHA hashing instantly. Includes config snippets and a free online tool with no registration.
- Chmod CalculatorCalculate Unix file permissions: octal (755, 644) ↔ symbolic (rwxr-xr-x) ↔ rwx checkboxes. Covers setuid, setgid, sticky bit. With presets.
- Excel Formula ExplainerPaste any formula and get a plain-English breakdown of 60+ functions online free—no sign-up required, in your browser.