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The DNS system is the secret sauce that makes the internet user-friendly, yet its inner workings can be complicated. This article will help you better understand DNS records — even if you’re a complete newbie — by answering the question: “What are DNS records?”
Written by Aleksandar Kochovski (Editor)
Reviewed by Aleksander Hougen (Managing Editor)
Facts checked by Jasna Mishevska (Lead Fact-Checking Editor)
Last Updated: 2024-03-25T12:52:00+00:00
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Facts & Expert Analysis About DNS Records:
The Domain Name System (DNS) is an essential part of how the internet functions. It translates complex numerical IP addresses into human-readable domain names, like google.com, letting us easily access websites and other online content.
DNS records are the instructions that make the DNS system work, as they decide how a request to a domain or subdomain should be handled. They serve various purposes, from mapping domain names to IP addresses, to identifying email servers and much more. Read on to learn more about what DNS records are and how they work as we dive into the most common DNS record types.
Aleksandar Kochovski (Editor)
Aleksandar Kochovski is a cybersecurity writer and editor at Cloudwards, with a rich background in writing, editing and YouTube content creation, focused on making complex online safety topics accessible to all. With a Master’s in Architecture and experience as an assistant professor of architectural planning and interior design, Aleksandar applies his research prowess to guide readers through the intricacies of VPNs and secure cloud services. His work is featured in Cloudwards and he has been quoted in The Daily Beast, reflecting his dedication to internet privacy. When not demystifying digital security, he indulges in diverse hobbies from bonsai to powerlifting.
Aleksander Hougen (Managing Editor)
Aleksander Hougen, the managing editor at Cloudwards, is a seasoned expert in cloud storage, digital security and VPNs, with an educational background in software engineering. Beyond his prolific writing commitment, Aleksander helps with managing the website, keeping it running smoothly at all times. Outside of the professional realm, he is a digital nomad with a passion for traveling, having lived in many countries across four continents.
Learn more about our editorial team and our research process.
Article rewritten with simpler language and more concrete examples to help beginners out as much as possible.
DNS records are data stored on authoritative DNS servers about domain names and their corresponding IP addresses, as well as the parameters used in DNS resolution. These records act as a directory, which the DNS system accesses to determine the domain’s IP address and other necessary information when a user tries to open a website or access an internet resource.
A domain’s DNS records play a crucial role in the following processes:
While there are numerous DNS record types, some are used more than others. Here are some of the most common types of DNS records and their explanations.
A records, or address records, are the fundamental DNS record type that maps a domain name to an IPv4 address, letting users access the website or service associated with the domain. Here are some other uses for A records:
As the internet grows, the pool of available IP addresses shrinks. IPv6 addresses were invented to solve this issue. They are more complex and offer more combinations than IPv4 addresses. The pool of IPv4 addresses totals 4,294,967,296 — around 4.3 billion. In contrast, the total number of possible IPv6 addresses is 340 undecillion (that’s 3.4 followed by 38 zeros).
An AAAA record is very similar to an A record, but it’s used for the newer IPv6 addresses. IPv6 is gaining traction — it already represents around 45% of all Google traffic — and AAAA records will become increasingly important as IPv6 adoption grows.
AAAA records are only used when the website has an IPv6 address and the user’s device supports IPv6. Otherwise, they are used in all the same ways as A records.
A CNAME record (canonical name record) is used to map one domain name onto another. This is known as aliasing, which is why this record type has a variant called an ANAME record, or alias name record.
ANAME records address some of the CNAME record type’s limitations that relate to root domains. ANAME records point a root domain to another domain or subdomain, which CNAME records aren’t allowed to do. This is useful in cases where a different server hosts some of the root domain’s functionality.
MX records, or mail exchange records, specify the mail servers that are responsible for handling email for a particular domain. MX records must always point directly to an A or AAAA record; they cannot point to a CNAME or other aliases.
Some DNS entries have multiple MX records that cover many mail servers for the purpose of redundancy. In this case, priority values are assigned to each MX record, where lower values get priority over higher values. If multiple MX records have the same priority value, they enter a round-robin scheme, which randomly assigns emails to each server of equal priority.
A TXT record (or text record) is the most versatile DNS record type, able to hold various kinds of text-based information. It generally covers use cases for which other DNS record types would be inappropriate. Its original purpose was to add notes to the zone file, though it’s now mostly used for spam filtering and verifying domain ownership.
SRV records (or service records) define the host and port for specific services hosted on a domain, letting users access them.
NS records (or name server records) specify the authoritative DNS servers responsible for hosting the DNS records of a particular domain. Domains often have at least two NS records pointing to different primary and secondary DNS servers, either for redundancy or load-balancing. NS records operate at every level of the domain hierarchy:
Apart from the essential DNS records that we listed, you might also encounter the following:
Understanding DNS records is crucial for anyone who works with websites, email servers or any internet-based services. While the intricacies of the domain name system can be complex, knowing the most common record types and their purposes will help you to better manage your website’s operation.
As the internet continues to evolve, DNS records will remain a vital component, ensuring users can easily access the content they need. What are your thoughts on the DNS system? Have you ever had to configure DNS records yourself? Have you ever encountered issues with DNS records when setting up a website? Let us know in the comments below, and as always, thank you for reading.
An MX record identifies the email servers tied to a particular domain, making sure emails reach their appropriate destinations.
NS records delegate a DNS zone (or domain) to the correct authoritative DNS server.
DNS records are stored on a DNS server that holds all the zone files for a particular domain.
An A record contains information about which IP address belongs to which domain.
One thought on “What Are DNS Records? Explained for Beginners in 2024”
I don’t know the difference and I’m having that problem basically like I had got a bad like spam or ransomware and like the security of the device or the web viewer or Google Play It’s not being authenticated
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