DNS Lookup Tool
Perform advanced DNS lookups for any domain. Find A, AAAA, MX, CNAME, TXT, and SOA records directly from authoritative servers. Bypasses client caches.
Ready to lookup DNS records
Enter a domain name above and click "Lookup" to check DNS records across 28 global servers.
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Advanced DNS Lookup Tool
Our free DNS lookup tool performs deep-level querying of your domain's authoritative zone files. Whether you need to verify DMARC policies for email deliverability, compare AAAA and A record performance, or debug why a DNS lookup shows SERVFAIL, this tool instantly queries authoritative nameservers to give you raw, unfiltered domain configurations.
Comprehensive Record Audits
Resolve A, AAAA, MX, CNAME, TXT, NS, and SOA records to ensure your entire web and email infrastructure is mapped correctly.
Query Authoritative Sources
Standard DNS lookups often provide cached data. This tool queries authoritative nameservers directly for the absolute 'source of truth'.
Verify Email Deliverability
Validate SPF, DKIM, and DMARC configurations within TXT records to ensure your legitimate emails reach the inbox.
Compare AAAA and A Records
Dual-stack architectures require perfect alignment between IPv4 (A) and IPv6 (AAAA). Verify your modern cloud configurations.
A DNS lookup queries authoritative nameservers to reveal the exact routing configurations for a domain. By checking records like A (IPv4), AAAA (IPv6), MX (Email), and TXT (Security), network administrators can verify infrastructure setup, troubleshoot email bouncing, and ensure web traffic is routed to the correct hosting provider.
What is this tool?
This tool is a direct line to the internet's phonebook. It skips local caches and asks the master servers exactly what rules are set up for a domain's website, email, and security.
How to use it
- Type the domain name into the search bar.
- Select the specific record type you need (like TXT for security rules or A for the main server).
- Hit 'Lookup' to fetch the raw, unfiltered data directly from the authoritative source.
- Review the results table for IP addresses, TTLs (Time to Live), and raw text values.
Real-World Use Cases
- Verifying that a new SSL certificate is pointing to the correct server IP.
- Checking the exact DMARC policy string to debug why emails are landing in spam.
- Confirming that a CNAME alias is properly routing to a service like Shopify or Vercel.
Example Outputs
Querying a TXT record might output: 'v=spf1 include:_spf.google.com ~all', confirming Google is authorized to send emails on your behalf.
What is an A Record?
An "A" (Address) Record is the most fundamental type of DNS record. It points a domain name or subdomain (such as www.example.com) directly to an IPv4 address (such as 192.0.2.1). Think of it as the primary phone book entry for your website. When a user types your URL into their browser, the DNS resolver looks up the A Record to find the exact server location where your website's files are hosted. Without a properly configured A Record, users will be unable to access your site via its domain name.
How to use the GetDNSInfo A Record Tool
Using our DoH-powered A Record lookup tool is incredibly straightforward. Simply enter your domain name (e.g., getdnsinfo.com) into the search field and click 'Lookup.' The tool will securely query the DNS infrastructure and instantly return the current IPv4 address associated with your domain. You will also see the TTL (Time to Live) value, which indicates how long DNS resolvers are instructed to cache this information before checking for updates. This tool is invaluable when you have recently moved your website to a new hosting provider and need to verify that your domain is pointing to the correct new IP address.
Common A Record Errors and Fixes
Even minor mistakes in A Record configurations can take your website offline. Here are the most common issues:
- Incorrect IP Address: The most frequent error is simply pointing the A Record to an outdated or incorrect IPv4 address. Fix: Double-check the IP address provided by your current hosting provider and update the A Record in your domain registrar's control panel.
- Missing 'www' Subdomain: Users often forget to create an A Record for the
wwwversion of their site. Fix: Ensure you have separate A Records for both the root domain (example.com) and the subdomain (www.example.com), or use a CNAME for thewwwversion. - Multiple Conflicting A Records: Having multiple A Records pointing to different IPs can cause intermittent loading failures (DNS Round Robin issues). Fix: Remove any legacy A Records that point to old servers, keeping only the record for your active host.
What is an AAAA Record?
An AAAA Record (often pronounced "Quad-A") serves the exact same function as an A Record, but it is designed specifically for IPv6 addresses. While A Records use the older, 32-bit IPv4 format, AAAA Records map a domain name to the newer, 128-bit IPv6 format (e.g., 2001:0db8:85a3:0000:0000:8a2e:0370:7334). As the internet exhausts its supply of IPv4 addresses, IPv6 adoption is rapidly increasing. Having an AAAA Record ensures that your website is fully accessible to users and networks that operate natively on modern IPv6 infrastructure, future-proofing your digital presence.
How to use the GetDNSInfo AAAA Record Tool
To check your IPv6 configuration, enter your domain name into the GetDNSInfo AAAA Record search bar and execute the lookup. Our tool utilizes encrypted DNS-over-HTTPS to securely fetch your domain's IPv6 routing data. If your server and DNS provider support IPv6, the tool will display the associated address alongside its TTL value. If no record is found, it simply means your domain is currently relying solely on IPv4 routing. Webmasters should use this tool to verify successful IPv6 deployment and ensure compatibility with modern mobile networks and ISPs.
Common AAAA Record Errors and Fixes
Configuring IPv6 can be slightly more complex than IPv4. Watch out for these common pitfalls:
- Formatting Errors: IPv6 addresses are long and complex, making typos highly probable. Fix: Always copy and paste the exact IPv6 address provided by your host rather than typing it manually.
- Server Incompatibility: You might set up an AAAA Record, but your web server software (like Apache or Nginx) isn't configured to listen on IPv6. Fix: Verify your server block or virtual host configurations to ensure they are actively binding to the
[::]IPv6 address. - Premature AAAA Implementation: Adding an AAAA Record before your firewall or security rules are updated for IPv6 can result in blocked traffic. Fix: Ensure all security groups, firewalls, and CDN settings are fully IPv6-compatible before adding the AAAA Record to your live DNS zone.
What is a CNAME Record?
A Canonical Name (CNAME) Record is used to map one domain name (an alias) to another domain name (the canonical or true name). Instead of pointing to an IP address like an A Record, a CNAME points to another hostname. This is incredibly useful for managing subdomains. For example, you can point blog.example.com and shop.example.com to your main domain example.com. If the IP address of example.com ever changes, you only need to update the single A Record; all the CNAME aliases will automatically route to the new IP, simplifying DNS management immensely.
How to use the GetDNSInfo CNAME Record Tool
To verify your domain aliases, input the specific subdomain or alias you wish to check (e.g., www.yourdomain.com) into our CNAME tool. Using secure DoH queries, the tool will reveal the canonical hostname that the alias is pointing to. Webmasters frequently use this tool when integrating third-party services, such as pointing a custom domain to a Shopify store, a Zendesk support portal, or verifying CDN configurations like Cloudflare. It provides immediate confirmation that the alias is successfully redirecting to the target service.
Common CNAME Record Errors and Fixes
While useful, CNAME records have strict architectural rules that are often violated:
- CNAME at the Root Domain: The DNS protocol forbids placing a CNAME record at the root or apex of a domain (e.g., exactly at
example.com). This breaks other records like MX or TXT. Fix: Only use CNAMEs for subdomains (www,blog). Use an A Record or an ALIAS/ANAME record (if your DNS provider supports it) for the root domain. - CNAME Loops: Creating a CNAME that points to another CNAME, which ultimately points back to the first, creates an infinite loop that breaks resolution. Fix: Audit your DNS zone and ensure all CNAMEs eventually resolve to an A or AAAA record, not in a circle.
- Combining Records: A subdomain with a CNAME cannot have any other DNS records (like TXT or MX) associated with it. Fix: If a subdomain requires an MX record for email, you must use an A Record instead of a CNAME for that specific subdomain.
Common DNS Lookup Record Formats
| Record Type | Strategic Use Case |
|---|---|
| A (IPv4) | The backbone of the old internet. Points the domain to a 32-bit IP address. |
| AAAA (IPv6) | Future-proofs the domain. Bypasses NAT bottlenecks increasing routing speed. |
| TXT (DMARC/SPF) | Mandatory for modern email. Prevents unauthorized servers from sending mail as you. |
| SOA (Start of Auth) | Defines the administrator email and the baseline TTL for negative caching. |
| CNAME | Allows easy pointing to PaaS providers like Vercel, Heroku, or Shopify. |
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