DNS Lookup Online Tool
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Check DNS records with our free online DNS checker. View TXT, MX, CNAME and other domain records instantly.
Paste a website URL, hit the button, and check the DNS records:
How the Online DNS Lookup Works
This tool queries public DNS resolvers and returns the live records for any domain you enter. Here's the process:
- Enter a domain, type or paste any domain name. The tool strips protocols and paths automatically, so pasting a full URL works too.
- DNS query, the checker runs lookups across all major record types (A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, CAA) in parallel.
- Results, records are grouped by type with full details: values, TTLs, priorities, targets. Everything a DNS panel would show you, without logging in.
DNS Record Types Explained
Not sure what the records in your results mean? Here's a quick reference:
- A, points a domain to an IPv4 address. This is how browsers find your website's server.
- AAAA, same as A, but for IPv6 addresses.
- CNAME, an alias that points one domain to another (e.g.,
www→ root domain). - MX, mail exchange records. These tell the internet where to deliver emails for your domain.
- TXT, text records used for verification, SPF, DKIM, DMARC, and other domain ownership proofs.
- NS, nameserver records. They define which DNS provider manages your domain's zone.
- SOA, start of authority. Contains zone metadata like serial number, refresh intervals, and the primary nameserver.
- SRV, service records for specific protocols (like VoIP, XMPP, or Microsoft 365 autodiscover).
- CAA, certificate authority authorization. Controls which SSL certificate providers are allowed to issue certificates for your domain.
When to Run a DNS Lookup
DNS lookups aren't just for sysadmins. Here are the most common situations where checking DNS records saves time:
- After a website migration, switched hosts or moved to a new platform? Verify that A records, CNAME, and nameservers are pointing to the right place. DNS misconfiguration is the #1 reason new sites don't load after a migration.
- Email delivery problems, emails landing in spam or not arriving at all? Check your MX, SPF, DKIM, and DMARC records. A missing or misconfigured TXT record is usually the culprit. For a deeper diagnosis, use the Email Deliverability Checker which validates SPF, DKIM, and DMARC automatically.
- SSL certificate issues, if HTTPS isn't working, CAA records might be blocking your certificate provider. A quick lookup tells you exactly what's set.
- Verifying DNS propagation, made a change and not sure if it's live? Run a lookup to see what the public internet currently resolves for your domain. You can also check domain registration details and expiry dates with the WHOIS Domain Lookup.
If you're doing a full site health check, pair this with the Robots.txt Tester and Sitemap Validator to cover both DNS and SEO basics in one pass. For HTTPS issues, the SSL Certificate Checker will show exactly what your certificate covers and when it expires.
Want to understand what each DNS record type means and how they work together? Our guide on how to check your website's DNS records explains A, AAAA, CNAME, MX, TXT, and NS records with real-world examples and troubleshooting tips.
DNS Lookup Tool: FAQ
What is a DNS lookup tool?
A DNS lookup tool lets you inspect a domain's public DNS records and see how that domain is configured on the internet. It helps you check records connected to website pointing, email routing, verification, and security. In simple terms, it shows the live DNS data behind a domain without needing to log into the DNS provider first.
Which DNS record types can I look up with this tool?
You can look up common record types such as A, AAAA, CNAME, MX, TXT, NS, SOA, SRV, and CAA. Each one serves a different purpose depending on what you are trying to verify. For example, A and AAAA records help point websites, MX records handle email routing, and TXT records often contain verification or email-security data like SPF, DKIM, or DMARC.
DNS lookup vs WHOIS: what's the difference?
A DNS lookup shows the live technical records a domain is currently using. A WHOIS lookup shows registration-related information such as registrar details, creation dates, and sometimes ownership data if it is not privacy-protected. So DNS tells you how a domain is configured right now, while WHOIS tells you more about the domain's registration background.
I updated DNS. Why don't I see the changes yet?
DNS changes can take time to appear because of caching. Even after you save a new record at the DNS provider, internet resolvers, ISPs, devices, and browsers may continue serving the older record until the TTL cache expires. That is why you can make a correct change and still not see it immediately. A DNS lookup tool helps you check what is currently visible from the public side.
How long does DNS propagation usually take?
Many DNS changes appear within minutes or a few hours, but some can take up to 24 to 48 hours depending on TTL settings, resolver refresh timing, ISP caching, and device-level cache. So if your record still looks old right after an update, that does not automatically mean the change failed. It often just means propagation is still in progress.
Can I look up DNS records for a subdomain?
Yes. You can run a DNS lookup for a subdomain the same way you would for a main domain. That is useful when checking records for things like mail, blog, shop, app, or other separate hosts under the same domain. Subdomain DNS checks are especially handy when troubleshooting custom setups or service-specific routing.
Does this tool support international domain names?
Yes. International domain names can be checked too. If the domain uses non-Latin characters, the lookup is typically handled using its DNS-compatible punycode form behind the scenes. The returned DNS records are still the real public records for that domain.
Does this DNS lookup tool store the domains I search?
No. The tool only performs the DNS lookup and returns the result. We do not store or log the domains you search, and no personal data is collected through the lookup itself. That makes it a simple privacy-friendly way to inspect public DNS records.
Is this DNS lookup tool free to use?
Yes. This DNS lookup tool is completely free to use. It is built to give website owners, developers, agencies, and technical users a fast way to inspect DNS records without extra friction.
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