How to See Which Domains Are Owned by the Same Person Using IP

You Can Trace Website Ownership—Starting With an IP Address

Looking to uncover whether multiple websites are secretly controlled by the same person?

It sounds simple because it is. But it’s also powerful.

If you’re an SEO analyst, cyber researcher, or just snooping on a shady competitor’s PBN setup, starting with their server IP can reveal a whole cluster of domains owned by the same operator.

It’s called Reverse IP Lookup, and it’s one of the fastest ways to uncover digital connections between websites.

But wait—this isn’t a silver bullet. It’s just the beginning.

You’ll also need WHOIS data, DNS records, content patterns, and a few Google tricks.

So let’s break it down step by step.

How to See Which Domains Are Owned by the Same Person Using IP

Important Note: The Limitations of IP-Based Investigation

Before we dive deep, let’s set expectations.

Here’s what you need to watch out for when using IPs to identify ownership:

Shared Hosting: One IP can host hundreds of unrelated websites—especially with budget hosting platforms.
CDNs & Reverse Proxies: Sites behind Cloudflare or other CDNs don’t expose their true IP address.
WHOIS Privacy: Domain owners often hide their identities using privacy shields. That makes direct name-matching harder.
Dynamic IPs: Some hosting environments rotate IPs over time, making past associations unreliable.

Still—when combined smartly, these clues form a clear enough trail to make highly educated connections.

How to Find Which Sites Are Owned by the Same Person: A Step-by-Step Guide

This part’s built for featured snippet visibility, so it’s scannable and direct.

1. Get the IP Address of the Website

Use a free tool like SEO Media World’s URL to IP
👉 Just paste the domain → it gives you the IP instantly.

2. Run a Reverse IP Lookup

Plug the IP into tools like:

Tool	Purpose	Ease of Use
DNSlytics	Shows domains on a single IP	Easy
ViewDNS.info	Reverse IP, WHOIS & DNS info	Easy
IPinfo.io	IP insights & geolocation	Moderate
SecurityTrails	Full DNS, SSL, WHOIS database	Advanced

You’ll now see a list of domains hosted on that IP.

3. Look for Obvious Patterns

Scan for:

Domains that link to the same main site
Similar naming conventions or TLDs
Matching content structure, colors, and meta descriptions
Domains using the same CMS or plugin stack

4. Dig into WHOIS Data (If Available)

WHOIS records tell you:

The registrant’s name
The email address
The registrar used
Creation/expiry dates
Name servers

Use Whois.com or SecurityTrails to check if several domains share the same:

Contact email or name
Registrar or hosting provider
DNS setup

5. Use Google Search Operators

Now go sleuthing in Google:

“contact@domain.com” → See where else the email appears
“(800) 555-1234” → Shared phone number across sites?
“Copyright © 2025 Acme LLC” → Same business name/footer
site:example.com combined with other operators

This helps uncover hidden site relationships and shared templates.

6. Analyze SSL Certificates (Optional But Powerful)

Using tools like Censys.io or SSL Shopper, check:

The Organization name in the SSL cert
Issuer details
Shared certs between domains
Validity windows

SSL often exposes enterprise or eCommerce operators who forgot to hide their tracks.

Beyond the IP: Other Tactics to Confirm Ownership

Once you’ve checked the IP address, don’t stop there.

WHOIS Data Analysis – What to Look For

Same email address across domains
Matching physical addresses or phone numbers
Consistent name servers
Domains registered within the same time period

Even with WHOIS privacy enabled, patterns still leak out.

Analyzing Shared Digital Footprints

The web is messy—but some patterns repeat.

Look for these shared assets:

Google Analytics IDs or Google Tag Manager containers
AdSense publisher IDs
Social media profiles (icons linking to the same Facebook page)
Reused CSS, layout templates, favicons, or font packs

These indicators suggest control—even if names and IPs are masked.

Putting It All Together: A Strategic Ownership Tracing Framework

To stand out from basic tutorials, we’re giving you a 4-step blueprint to trace ownership across sites.

Step 1: Initial Recon with IP Tools

Use URL to IP to extract the domain’s IP
Run a Reverse IP Lookup
List all domains hosted on that address

Step 2: Confirm with WHOIS

Check WHOIS for overlapping registrant data
Highlight matching emails, companies, or address info
Check for the same registrar, hosting provider, or DNS config

Step 3: Pattern Matching in the Digital Footprint

Run Google queries to find content, layout, and branding overlaps
Check source code for shared tracking IDs
Look for copy-paste meta tags, shared ads.txt files, and social profile links

Step 4: Evaluate & Connect the Dots

Ask yourself:

Do 3 or more signals line up?
Are connections consistent across tools?
Does the ownership pattern match the purpose (e.g., link building, affiliate pushing)?

You don’t need a smoking gun. You need enough cross-confirmed signals to act with confidence.

Use Case: You Suspect a Link Network—Now What?

Let’s say you find 12 domains linking to your competitor’s site.

They all look basic. Low content quality. No authors.

What you do:

Drop those domains into SEO Media World’s URL to IP tool
Half of them share the same IP
WHOIS data shows three with the same admin email
A few have the same Google Analytics ID
They all link to the same product page

Boom. You’ve uncovered a private blog network (PBN).

Now you know how your competitor is gaming the algorithm.

Final Thoughts

In an era of privacy tools and Cloudflare masks, digital forensics still works.

You just have to dig smarter.

Using a simple IP address, you can uncover entire networks of hidden domains. Combine that with WHOIS records, SSL data, and smart Google searches, and you’ve got a reliable playbook for finding site ownership patterns.

Whether you’re auditing backlinks, investigating shady SERP behavior, or mapping competitor ecosystems—these methods give you the edge.