DNS lookup – your essential tool for domain analysis

Use Sendmarc’s DNS lookup tool to instantly analyze your domain’s DNS record. This tool identifies A/AAAA, TXT, MX, NS, CNAME, CAA, SOA, and SRV records, helping ensure your domain is set up for optimal performance.

To get started, simply enter your company’s domain in the tool below and click Lookup.

What is a DNS lookup, and why is it important?

Sendmarc Dns Lookup Tool

A DNS lookup is the process of querying the Domain Name System (DNS) to translate a user-friendly domain name, such as sendmarc.com, into the IP address that computers use to communicate. It acts like the internet’s phonebook, converting names people remember into addresses computers understand.

For IT professionals and engineers, a DNS checker is essential to:

  • Check published DNS records
  • Troubleshoot connectivity issues
  • Validate domain changes

By using a DNS lookup tool to verify record presence and accuracy, you can detect configuration issues early, improve reliability, and strengthen your domain’s overall security posture.

How does a DNS lookup work?

When a user enters a domain name such as example.com into a browser, a series of DNS queries takes place to find the correct IP address.

The process happens in several quick steps:

  1. Requesting domain information: A user enters a domain name to request the IP address.
  2. Contacting the recursive DNS server: The browser sends the query to a recursive resolver, typically managed by the router or internet service provider (ISP).
  3. Checking for cached results: If the resolver already has a recent record stored in its cache, it returns that information immediately.
  4. Querying the root nameserver: If the record isn’t cached, the resolver contacts a root nameserver, which directs it to the appropriate top-level domain (TLD) nameserver.
  5. Reaching the TLD nameserver: The TLD server points to the authoritative nameserver responsible for the specific domain.
  6. Accessing the DNS record: The resolver requests the record from the authoritative nameserver, which returns the relevant data.
  7. Delivering the response: The resolver caches the record and returns the information to the user.

Each DNS checker typically takes milliseconds to perform a lookup, seamlessly translating a user-friendly domain name into the technical details needed for internet communication.

Check DNS record

Common use cases for DNS lookup

IT and security professionals use a DNS lookup tool in several key scenarios:
  • Website troubleshooting: Identify DNS misconfigurations or expired records that may cause website downtime.
  • Domain management: Validate DNS entries after updates to ensure domain functionality.
  • DNS propagation monitoring: Confirm that DNS changes have propagated globally to prevent inconsistent access.

Key features of our DNS lookup tool

Sendmarc’s DNS lookup tool delivers fast, reliable, and comprehensive domain analysis with the following features:

  • Speed and accuracy: Get real-time DNS lookup results with minimal delay.
  • Comprehensive record support: Seamlessly query multiple DNS record types, including A, AAAA, MX, TXT, CNAME, and more.
  • User-friendly interface: Built for both technical professionals and beginners, allowing them to perform accurate lookups with ease.
Verify DNS

Why choose Sendmarc’s DNS lookup tool?

Sendmarc delivers reliability, speed, and simplicity through an intuitive DNS lookup tool that forms part of our digital offerings. Trusted by IT and security professionals worldwide, our tool helps organizations ensure accurate domain configuration.

Key benefits include:

  • Accurate domain insights: Quickly review your domain’s DNS records to maintain a clear, up-to-date overview of your configuration.
  • Improved visibility and control: Detect errors or missing records early to prevent disruptions and maintain reliable domain performance.
  • Fast, dependable results: Access real-time DNS data from global servers for consistent and accurate analysis.

Take action: Enhance your domain security today

Protect your domain and secure every email with Sendmarc’s comprehensive cybersecurity platform.

Start by auditing your domain using our DNS lookup tool, then progress to full implementation of Sender Policy Framework (SPF), DomainKeys Identified Mail (DKIM), and Domain-based Message Authentication, Reporting, and Conformance (DMARC).

Book a demo to see how Sendmarc helps your business prevent email fraud, maintain compliance, and build trust with clients.

Book a demo

DNS lookup FAQs

What is DNS lookup used for?

DNS lookup is used to translate human-readable domain names into IP addresses. A DNS lookup helps retrieve the DNS records needed for website functionality.

You can look up a DNS name by using tools like the Sendmarc DNS lookup tool to query DNS servers. A DNS lookup retrieves the records linked to a domain, providing insight into its configuration.

DNS lookup works by sending queries through a chain of DNS servers – including root, top-level domain (TLD), and authoritative servers – to resolve a domain name into its machine-readable IP address and associated records.

A DNS lookup can retrieve multiple record types, including A, AAAA, MX, TXT, CNAME, NS, SOA, CAA, and SRV records. These records provide key details about how your domain is configured.