Part 3: DNS Explained The Internet’s Phone Book
Reading time · 5 minutes
What Are DNS Records, and Why Does Nothing Work Without Them?
You have a domain.
You have hosting.
Maybe you even have business email.
So why isn’t anything working?
Because the internet still doesn’t know where to send people.
That’s where DNS comes in.
DNS (Domain Name System) is one of the most important parts of the internet—and one of the least understood.
Most business owners never see it.
Most website visitors never think about it.
Yet every time someone visits a website, sends an email, or clicks a link, DNS is quietly working behind the scenes.
Imagine You’re Moving Into a New Office
Let’s say your business moves into a brand-new office building.
You have:
- A business name
- A street address
- A phone number
- A mailbox
But if nobody updates Google Maps, the postal service, or the phone directory, people won’t know how to reach you.
DNS works the same way.
It tells the internet:
- Where your website lives
- Which server receives your email
- Which services belong to your domain
- How visitors should connect securely
Without DNS, your domain is just a name.
What Does DNS Actually Do?
Think of DNS as the internet’s phone book.
When someone types:
yourbusiness.com
Their computer asks:
“Where can I find this website?”
DNS responds:
“The website is located at this server.”
The browser then connects to the correct location.
This process happens in milliseconds.
The Most Common DNS Records You’ll Encounter
The word “record” simply means an instruction.
Each DNS record tells the internet how to handle part of your domain.
A Record
The Website Record
An A Record points your domain to a server’s IP address.
Example:
yourbusiness.com
↓
192.168.1.100Think of it as:
“When someone visits my website, send them here.”
Without an A Record, visitors cannot find your website.
CNAME Record
The Alias Record
A CNAME creates a nickname.
Example:
www.yourbusiness.comcan point to
yourbusiness.comThis prevents you from managing multiple destinations separately.
Think of it as mail forwarding.
MX Record
The Email Record
MX stands for Mail Exchange.
This tells the internet:
“Where should emails for this domain be delivered?”
For example:
[email protected]Without MX records:
❌ Email cannot be received.
Even if your website works perfectly.
TXT Records
The Verification Record
TXT records are used to prove ownership and improve security.
Many services ask you to add a TXT record when setting up:
- Business email
- Google services
- Microsoft 365
- SSL certificates
- Marketing platforms
Think of a TXT record as:
“Yes, I own this domain.”
SPF Record
Anti-Spam Protection
SPF is usually stored as a TXT record.
It tells receiving email servers:
“These are the systems allowed to send email for my domain.”
Without SPF:
Some messages may be rejected completely.
Emails may land in spam folders.
DKIM Record
Email Signature Verification
DKIM digitally signs outgoing emails.
It helps receiving servers verify:
- The email is authentic.
- The email was not altered during delivery.
This improves trust and deliverability.
DMARC Record
Email Protection Policy
DMARC works together with SPF and DKIM.
It tells receiving email providers what to do if a message fails verification.
For example:
- Accept it
- Quarantine it
- Reject it
DMARC helps prevent email spoofing and phishing attacks.
Why DNS Seems So Confusing
Because DNS wasn’t designed for business owners.
It was designed for computers.
You might see records that look like:
v=spf1 include:_spf.google.com ~allor
google-site-verification=abc123xyzTo a computer, that’s perfectly clear.
To most humans, it looks like someone fell asleep on the keyboard. But if you let us manage this for you – you wont have to worry about all these records we will do them for you.
Common DNS Mistakes
Mistake #1
Deleting Existing Records
Many people accidentally remove email records while trying to point a website.
Result:
✅ Website works
❌ Email stops working
Mistake #2
Changing Nameservers Without Understanding Them
Nameservers control the entire DNS zone.
Changing them can disconnect:
- Website
- Subdomains
- Verification records
all at once.
Mistake #3
Forgetting DNS Propagation
DNS changes aren’t always instant.
Updates may take:
- A few minutes
- Several hours
- Occasionally up to 48 hours
Patience is often required.
Mistake #4
Not Documenting DNS
Businesses frequently lose track of:
- Who manages DNS
- Where DNS is hosted
- Why records were created
Always document important DNS changes.
The Three Records Every New Business Usually Needs
At minimum:
Website
A RecordPoints visitors to your website.
WWW Redirect
CNAMEMakes www.yourbusiness.com work.
MX RecordsAllows email delivery.
Everything else builds from there.
The Hidden Truth About DNS
When people say:
“My website is down”
the website often isn’t down at all.
The problem is DNS.
When people say:
“My email stopped working”
the problem is frequently DNS.
When people say:
“I switched providers and now everything is broken”
the culprit is usually DNS.
DNS is the invisible glue holding your online presence together.
When it’s configured correctly, nobody notices.
When it’s wrong, everything breaks.
Final Thoughts
Your domain is your address.
Your hosting is your building.
DNS is the map that tells the world how to find both.
Without DNS:
- Websites don’t load.
- Emails don’t arrive.
- Services can’t verify ownership.
- Visitors get lost.
Understanding DNS doesn’t require technical expertise.
You simply need to remember one thing:
DNS is the directory that tells the internet where everything belongs.
And once you understand that, the rest starts making a lot more sense.
Next in the Series
So You Want to Build a Website? Start Here — Part 4: What Is a Website, Really? Understanding Pages, Content, and How Websites Actually Work
We’ll explore what a website actually consists of, the pages every business should have, and why simply publishing a website doesn’t automatically bring customers.