DNS Record Types Explained
How does a browser know where exactly is the website?
As we know, when we visit a website like chaicode.com, we don’t type any IP address, but the website still opens correctly. Ever wondered how this actually happens?
In this blog, we’ll understand what DNS is, why DNS records are needed, and how different DNS record types work together to run a website smoothly.
What is DNS? (in very simple terms)
DNS stands for Domain Name System.
The easiest way to understand DNS is to think of it as the phonebook of the internet.
→We humans remember names like example.com
→Computers understand numbers like 142.250.183.206
DNS acts as a translator between domain names and IP addresses, so browsers can find the correct server.
Without DNS, we would need to remember IP addresses for every website, which is clearly not practical.
Why are DNS records needed?
DNS records are needed to tell the internet:
→where a website is hosted
→where emails should be delivered
→who controls a domain
→what extra information is associated with a domain
Each DNS record solves one specific problem, and together they make a website work properly.
What is an NS Record? (Who is responsible for the domain)
An NS (Name Server) record tells who is responsible for managing DNS records for a domain.
In simple words:
→NS records point to the servers that know all DNS information for a domain
Think it like:
“If someone asks about this domain, ask these name servers.”
Without NS records, DNS queries wouldn’t know where to go.
What is an A Record? (Domain → IPv4 address)
An A record connects a domain name to an IPv4 address.
Example idea:
→example.com → 93.184.216.34
This is the most important record for websites because it tells the browser where the website actually lives.
Think of it like:
House name → house address
What is an AAAA Record? (Domain → IPv6 address)
An AAAA record does the same job as an A record, but for IPv6 addresses instead of IPv4.
Why this exists:
→The internet is running out of IPv4 addresses
→IPv6 is the newer and larger addressing system
So:
→A record → IPv4
→AAAA record → IPv6
What is a CNAME Record? (One name pointing to another name)
A CNAME (Canonical Name) record points one domain name to another domain name.
Instead of pointing to an IP address, it points to another domain.
Example idea:
www.example.com→example.com
This helps avoid duplication. If the main domain changes its IP, all CNAMEs automatically follow.
Common confusion: A vs CNAME
→A record → points to an IP
→CNAME record → points to another domain name
What is an MX Record? (How emails find your mail server)
An MX (Mail Exchange) record tells email servers where to deliver emails for a domain.
When someone sends an email to:
MX records tell the internet:
→which mail server should receive it
→in what priority order
Without MX records, emails would not know where to go.
What is a TXT Record? (Extra information and verification)
A TXT record stores text-based information about a domain.
It is commonly used for:
→domain ownership verification
→email security (SPF, DKIM, DMARC)
→service verification (like Google, GitHub, etc.)
TXT records don’t directly affect website loading, but they play a big role in security and trust.
How all DNS records work together for one website
For a single website, multiple DNS records work together:
→NS records decide who manages the domain
→A / AAAA records tell browsers where the website is hosted
→CNAME records handle alternate names like www
→MX records route emails correctly
→TXT records provide verification and security data
Each record handles one responsibility, and together they make the website fully functional.
Simple example: A small website setup
Imagine a small website:
→Visitors access the site using A / AAAA records
→www version points using CNAME
→Emails work using MX records
→Security checks happen using TXT records
→DNS authority is controlled using NS records
This shows how DNS is not just one record, but a system of records working together.
Conclusion
DNS records may look confusing at first, but each record exists to solve a specific problem. By understanding DNS as the phonebook of the internet and learning records one by one, things become much clearer.
Instead of memorizing record types, it’s better to understand what problem each record solves. This mental model makes DNS easier and less intimidating for beginners.