Do you want to lớn dive into a tech topic that puts marketers và sales representatives lớn sleep faster than a dose of Ambien? 

We’re about to talk about how a forward domain name name system (DNS) lookup can help your business-to-business (B2B) company capitalize on a reverse DNS (rDNS) lookup.

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Are you still fully awake? If that last sentence didn’t knoông chồng you out, then maybe you can make it through this. 

To be fair, it’s super important information — just maybe avoid operating any heavy machinery until we’re done.

Let’s get down to lớn the nitty-gritty, immediately, before you change your mind:

With a forward DNS lookup, the DNS is queried for the IPhường address of a certain hostname. 

A reverse DNS is exactly what you’d expect. It’s where the hostname of a certain IP address is queried.

Basically, a reverse DNS lookup returns the hostname of an IP address.

Information about where an IP address came from is useful lớn B2B companies in particular. When they can trachồng who visits their trang web, they can translate that data inlớn sales prospects.


Knowing who’s looking at what you have sầu lớn offer is the kind of information Tinder charges a premium for. 

Note: Want to lớn identify the B2B sales leads lurking within your website? Sign up and try không tính phí for 14 days.

What does a reverse DNS lookup tool do?

Unlike a chainsaw (which does not saw chains), a reverse DNS lookup tool does exactly what you’d expect it to. 

It allows you lớn perkhung reverse DNS lookups. 

Of course, it does a little bit more than that. A reverse DNS lookup tool provides additional information, such as the country and city the IP.. address is attached to lớn.

Not a believer? Try it yourself.

Results for your DNS lookup
IPhường address:
What is your IP. address
IPhường. address:

You can use the size above sầu khổng lồ make reverse DNS lookups. Type in an IPhường address (for example and press enter and the tool will make a reverse DNS lookup and return the name record for that IP. address.

Want khổng lồ see this kind of data for all of your website visitors? is a reverse DNS tool that can show you every company that is visiting your website. Simply connect your Google Analytics và install the Tracker script to lớn see the companies visiting your site. Get started with a 14 day không lấy phí trial.

What is reverse DNS in laymans terms

You can use the above form to vị reverse DNS lookups. 

Type in an IP address (for example, & press enter. The tool will perkhung a reverse DNS lookup and return the name record for that IPhường address.

If you’re operating a B2B business, there’s a huge advantage khổng lồ knowing what companies are accessing your trang web — these are the people who are most likely buying what you’re selling.

According lớn a 2018 report by CSO Insights, more than 70 percent of B2B purchasers know exactly what they need before they reach out to a sales representative sầu. 

On top of that, nearly half of B2B purchasers have already identified a specific solution for their pain point before getting in touch. 


When you identify a B2B buyer early in the process, you have a chance lớn swoop in with a solution (your solution). Even if it’s not a sản phẩm the purchaser has fully embraced — yet.

So, you want khổng lồ see this kind of data for all of your trang web visitors? Of course, you bởi. You’re not opposed to making money — this is America, after all (or whatever country you’re in). offers a reverse DNS tool that can show you every company that is visiting your website. 

Simply install the Tracker script to see the companies visiting your site. Get your toes wet (with leads) with a 14-day không tính phí trial.

Breaking down reverse DNS so your sales team gets it

Whenever you navigate lớn a certain webpage, your browser checks for the IPhường address of that domain name và uses that address to lớn find the correct page.

All right, buckle up — we’re about khổng lồ get into lớn the types of acronyms & phrases Silinhỏ Valley bros use lớn triông chồng rich people out of venture capital.

DNS stands for Domain Name System. It’s an address danh sách of computers connected to lớn the mạng internet. 

If you go khổng lồ Google, you’ll ask the DNS where the company is located online. 

Just as you would use a Rolodex to lớn find an address in real life. Just kidding, no one uses a Rolodex in real life.

What you can’t vì chưng with a Rolodex is find a person’s name by searching their address. 

However, thanks lớn the digital revolution, reverse DNS (rDNS) lookup now lets you find someone’s name based on their (internet) address. 

An rDNS lookup is the act of looking up mạng internet hosts by their IP. address.

Hence the “reverse” distinction in the name. 

Besides searching for what Google’s IPhường address is, you can also determine which company operates from the IP.. address

If you spkết thúc any time on the mạng internet (particularly in the YouTube comments section) it can sometimes feel like a chaotic, anarchic hellscape. 

However, the DNS address book is a stable system that everyone on the internet must agree upon. 

So, at least until Skynet takes over, you can trust that if the DNS says a company is, it’s really


Every single internet-connected device has an IP address. 

Yes. That means your phone, Roombố vacuum, Amazon Emang đến, and — most importantly in the B2B world — work computers all have sầu their own IP. address.

Though not every single IPhường address has a reverse DNS record, most of them bởi. 

To give sầu an example, when you accessed this blog post, your device provided your IP. address to lớn our VPS, & your browser knew our IP address. All thanks to lớn the DNS! 

If it wasn’t for this system, you’d need to rethành viên the IPhường address for any website you wanted to lớn visit. This would be a problem if, like most of us, you rethành viên names better than numbers.

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Now that you’re up to lớn tốc độ with how the mạng internet works, you’ll be able to lớn underst& how works lớn help with reverse DNS lookup. is a tool that can help you determine which companies have sầu indicated that they are interested in your services or products based on their employees having visited your website.

By running a reverse DNS, traces the IPhường address of those who visit your website right bachồng to their company.

It’s not rocket science — but it gets the job done.

What are “ptr-record” và “”

Sorry, we’re not done with the technical lingo of understanding a reverse DNS yet. 

The DNS is defined by zones. A zone is a separate portion of the tên miền name space. It was historically administered as one zone tệp tin. 

Most often a domain name is one zone.

The owner of the zone maps different addresses to different domain name names in their zone. 

For example, it maps the IPhường. address to point khổng lồ hostname “www” in zone “” This is done with DNS records.

This would mean that writing would direct your browser lớn address This is usually done with an A (or ALIAS) record & is the usual forward DNS.

How about reverse DNS? 

A PTR record is the record for reverse DNS. 

So, does the zone owner just add that IP address khổng lồ their zone và it’s all good? No. Reverse DNS works the other way around.

PTR record is stored in a special zone called 

This zone is administered by whoever owns the blochồng of IP addresses. In the example case, the zone for the PTR record would be authority.The owner of the IP address is usually the Internet Service Provider (ISP) & if you want khổng lồ add a PTR record lớn your IPhường address, you need khổng lồ contact your ISP..

Wait. Fight the gLaser spreading across your eyes! We’ve still got a few more related concepts to lớn discuss.

Why does anytoàn thân care about how to lớn bởi reverse lookup DNS?

Well, to be honest, most people don’t care. 

But anyone running a B2B business should care because failing lớn take notice is like running $100 bills through the shredder — except more legal.

Let’s break it down:

You have a trang web. We know this because you’re running a business in the 21st century.

This website is constantly gathering IP addresses from the devices that visit it.

With a reverse DNS tool, you can translate these IP addresses inkhổng lồ hostnames — many of which can result in meaningful leads. 

Now, the person doing the first round of research isn’t likely to lớn be the same person with the power khổng lồ make purchasing decisions for their company.

However, because the business can be identified through a reverse DNS tìm kiếm, can draw data about the company from LinkedIn. 

We’ll even give sầu you the necessary information you need to reach out to lớn the executives who will be making the final decision about a purchase.Of course, this is not always the case. While most IP. addresses can be translated inlớn hostnames, a lot of the time, that hostname is not very useful. 

The thing is, most normal people don’t own their IPhường. address. 

That’s because there’s a finite number of IPhường addresses available & a seemingly infinite number of new điện thoại phones, laptops, refrigerators, & other smart devices. 

According lớn a 2019 study from Deloitte, the average U.S. trang chính already has 11 internet-connected devices. 

So most people are basically renting an IPhường address from their ISP..That’s usually the case for mobile phones and home page broadb& connections. Your hostname will be something lượt thích 

Surprisingly, there’s still a lot of information hidden in that IP address. You can suss it out with WHOIS.

For example, that address tells you the user is from Helsinki, Finl&, & their ISP is DNA. 

You can even use this data to lớn pinpoint a more accurate location inside Helsinki where the connection was made. 

That’s nice, but there’s still no way you can identify the exact individual with this information.


For business-to-consumer (B2C) marketers, that’s the over of the line when it comes khổng lồ what a reverse DNS tìm kiếm can accomplish. 

You can use the location data lớn better target regions with your sale efforts or expvà your business in those areas.

However, things are very different when it comes lớn B2B sales and kinh doanh.

Unlượt thích the average Joe Ranvị, most companies have their own IP. addresses.So, put on your thinking cap và consider what that means for your B2B marketing team looking to fully utilize the power of reverse DNS searches.

If you managed to put on the correct hat (not the cone-shaped one with “dunce” written on it) you probably figured out the obvious: with a reverse DNS lookup, it’s possible to see exactly which companies visited your website. 

If the IP address is from a larger company, you can even see which offices their connection came from.

Then, all you have sầu khổng lồ bởi vì is launch that LinkedIn retargeting chiến dịch to zero in on the people with power — purchasing power!

Reverse DNS and email

Though it might not have sầu an impact on your kinh doanh efforts (unless you’re doing something wrong), it’s worth understanding the role reverse DNS plays in spam filtering.

Thư điện tử servers use reverse DNS (ahy vọng other systems) khổng lồ verify that the sending VPS is not a malicious spammer.