DNS Record Types Explained
A simple guide to A, AAAA, CNAME, MX, and more
1. What is DNS
DNS (Domain Name System) is the system that converts human-friendly names into the computer-friendly addresses.
ChaiCode.com -> 172.67.213.172
DNS is the internet’s phonebook.
2. Why DNS Record are needed
DNS record are needed because one domain needs to store many kinds of information not just one IP.
A domain is used for :
Website
Email
API’s
Security
Verification
Load Balancing
All of this needs the different data.
DNS records exist to attach the real world digital information to a domain name.
3. What is NS Record
NS (Name Server) record tells who is responsible for a domain.
NS record points to the authoritative DNS servers for a domain
Example:
Chaicode.com NS -> ns1.ChaiCode.com
Chaicode.com NS -> ns2.ChaiCode.com
It means if you want any information about the Chaicode.com ask to these servers.
4. What is A Record
A record tells the exact IPv4 address of a domain.
Example:
ChaiCode.com -> 172.67.213.172
Think like you are inviting you friend virat to your home.
you tell them name of your house Tejas’s villa (ChaiCode.com) they can’t find you home but if give them your address like Gokuldam society wing B room no : 2 powder galli goregaon east 564-234 (172.67.213.172 )them this address then your friend come you house.
A record is the house address of a website.
5. What is AAAA Record
AAAA record tells the exact IPv6 address of a domain.
It is just a modern version of the A record.
ChaiCode.com -> 2607.f8b0.080a::300e
Think of it’s like IPv4 is short phone number and IPv6 is a international long phone number.
AAAA record tells the same house address but using the modern address system.
6. What is CNAME Record
CNAME (Canonical Name) record is an alias for another domain name.
CNAME is nickname.
Example:
www.chaicode.com -> chaicode.com
This means www.chaicode.com is just a another name for chaicode.com
Think of it’s like ,
Real name : Virat Kohli
Nickname : King Kohli
Both refer to the same person, CNAME works the same way.
Different names → same destination.
CNAME doesn’t tell you where something is it tells you what its real name is.
7. What is MX Record
MX (Mail Exchange) record tell where emails for domain should be delivered.
MX record is the post office of domain.
chaicode.com -> mail.google.com
Think of it’s like ,
All letters of for Chaicode.com should be delivered to the mail.google.com
chaicode.com MX tell which company handle’s chaicode emails.
8. What is TXT Record
TXT (text) record stores extra information about the domain.
TXT record is public notice board for domain.
Chaicode.com TXT -> "google-site-verification=abc123"
This domain proves it is owned by this account.
Think of it’s like , on chaicode website there is page
This X account is owned by the Chaicode Pvt Ltd
TXT record is the domains official public message board used to prove identity and security.
9. What problem each record solves
- NS Record
Problem : DNS can’t be centralized
Solution : defines who control the domain.
- A Record
Problem : Browsers understand numbers not names
Solution : maps domain to IPv4 address
- AAAA Record
Problem : IPv4 is running out
Solution : maps domain to IPv6 address
- CNAME Record
Problem : One service need multiple names
Solution : makes one domain an alias of another.
- MX Record
Problem : Emails need delivery system
Solution : Routes mail to mail servers
- TXT Record
Problem : Need ownership proof
Solution : stores verification and security rules.
10. How a single domain uses multiple records together
Let’s take example of chaicode.com :
- Website
Chaicode.com -> A -> 104.21.12.34
It gives A record for Chaicode.com
- WWW version
www.chaicode.com -> CNAME -> chaicode.com
Different names but single destination.
chaicode.com -> MX -> mail.google.com
where the chaicode email will go .
- Ownership
chaicode.com -> NS -> ns1.cloudflare.com
Who controls the DNS for chaicode.
- Verification and security
chaicode.com -> TXT -> "google-site-verification=xyz"
chaicode.com -> Txt -> "v=spf1include:_spf.google.com~all"
It handles the identity and security.
11. Common beginner confusions
- A record Vs CNAME record
A points to an IP address and CNAME points to another domain name.
A record tells where it is and CNAME record tells what its real name is.
- NS record Vs MX record
NS tells who controls the domain and MX tells where emails should be delivered.
NS record is like domain name and MX record is like domain’s post office.
Final Thought
DNS records are like domain’s ID card each one gives specific instructions that makes the domain fully usable on the internet.