Free Online DNS Lookup

Troubleshoot website issues, verify domain configurations, and inspect mail server settings with our fast DNS lookup tool.

DNS Lookup

Resolve common DNS record types using public DNS-over-HTTPS.

Result

Enter a domain to see DNS records.

Why Use Our DNS Tool?

Whether you are migrating a website and need to confirm DNS propagation, changing your web host, or setting up new email servers, our online nslookup alternative provides clear, accurate data.

Fast & Reliable

Rapid responses for A, AAAA, CNAME, MX, and TXT record types, queried directly from a public resolver.

DNS-over-HTTPS

Queries run over encrypted DNS-over-HTTPS (DoH), so your lookups aren't visible to anyone snooping on plain-text DNS traffic.

No Terminal Needed

Get the same diagnostic answers as dig or nslookup, without opening a terminal.

How a DNS Lookup Actually Works

Every time you visit a website, this handoff happens in the background — usually in under 50 milliseconds.

1. You request a domain

Your browser asks: "What's the IP address for example.com?"

2. Resolver checks its cache

A recursive resolver (your ISP's, or a public one like Google's) checks if it already has a cached answer.

3. Authoritative server answers

If not cached, the resolver asks the domain's authoritative name servers, which hold the actual record.

4. Answer returned & cached

The IP (or MX/TXT value) comes back to your browser and is cached for the record's TTL, so the next request is instant.

Supported Record Types

DNS (Domain Name System) is the phonebook of the internet. Our tool lets you query the most common record types to ensure your domain is routing correctly.

A / AAAA RecordsCheck the IPv4 or IPv6 address associated with the domain.
CNAME RecordsVerify canonical names mapping domain aliases.
MX RecordsCrucial for troubleshooting business email delivery.
TXT RecordsValidate SPF, DKIM, and site ownership records.

How to Check DNS Records

  1. Enter Domain: Type the target domain name (e.g., example.com).
  2. Select Type: Choose the specific DNS record (A, MX, TXT) you want to query.
  3. Run Lookup: Click the lookup button to query public DNS servers.
  4. Analyze: Review the raw JSON output showing TTL, target values, and resolution data.

Common DNS Lookup Problems

01

NXDOMAIN / no records found

The domain either doesn't exist, isn't registered, or has no record of that specific type — e.g. querying MX on a domain that only serves a website will correctly return nothing.

02

Old IP still showing after a change

This is almost always TTL caching, not a broken change — the old value is cached somewhere in the chain until it expires. Wait out the previous TTL before assuming the update failed.

03

CNAME conflicts with other records

A CNAME must be the only record on that exact name — you can't have a CNAME and an MX or TXT record on the same hostname simultaneously. This is a DNS spec rule, not a tool limitation.

04

SPF record not being respected

A domain can only have one SPF-type TXT record. If you have two, most mail providers will treat the record as invalid (a "permerror"), which can hurt deliverability rather than help it.

Frequently Asked Questions

What does "DNS Propagation" mean?
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When you change a domain's DNS records, it takes time for that change to reach every resolver worldwide, because resolvers cache the old answer until its TTL expires. Propagation can take anywhere from a few minutes to 48 hours depending on the TTL you had set before the change.
What is a TTL?
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TTL (Time To Live) is a number attached to every DNS record that tells resolvers how many seconds to cache it before checking for an update. A low TTL (like 300 seconds) makes changes propagate faster; a high TTL reduces load on your DNS provider but slows down how quickly changes take effect.
Why are my emails not being delivered?
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Email delivery problems are usually tied to MX or TXT records specifically. Use this tool to confirm your MX records point to the correct mail server, and that your TXT records contain a valid SPF entry — missing or misconfigured SPF/DKIM/DMARC records are the most common cause of mail landing in spam or being rejected outright.
Does this tool use my own DNS server?
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No — lookups run through Google's public DNS-over-HTTPS resolver (dns.google) directly from your browser, bypassing your ISP's DNS and any local cache. That's actually useful for troubleshooting: it shows you what the wider internet sees, not what your own machine has cached.
Why doesn't this tool support NS or SOA records?
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Right now the tool covers the five record types most people need day-to-day — A, AAAA, CNAME, MX, and TXT. NS and SOA lookups are less commonly needed for everyday troubleshooting, but it's a reasonable addition we may add later.

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About This Utility

This tool is provided completely free of charge by Mavertex. Built by Kumar (an independent UI developer), our platform ensures your privacy by executing all operations strictly within your local browser DOM.

We prioritize zero-trust architecture. No files or inputs are ever uploaded to remote servers. This page serves as both an interactive web application and an educational resource explaining the mechanics of client-side operations. For further details on transparency and third-party network usage (including AdSense), please review our Privacy Policy.