Free Reverse IP Lookup
Enter an IP address to find the company or network behind it, with its location.
Free, no sign-up, 10 lookups a day. We don't store the addresses you look up in readable form.
What a Reverse IP Lookup Tells You.
One address in, an organisation out.
- 01
The Organisation Behind the Address
Every public IP address is registered to an organisation. When a company runs its own network, that is the company itself.
- 02
Where the Connection Is
The city, region and country the address is registered to, which is often, but not always, close to where the visitor is.
- 03
The Network Number (ASN)
The autonomous system the address sits in. It tells you whether you are looking at a business network, a cloud host or an internet provider.
Where a Single Lookup Falls Short.
Why some addresses only show an internet provider.
Internet Providers, Most home and small-office connections belong to the broadband provider, so a lookup shows the provider, not the business.
VPNs and Proxies, A VPN replaces the visitor's address with the VPN company's, which hides the employer completely.
Mobile Data, Phones on 4G and 5G share addresses across many people, so the lookup shows the mobile network.
Home Workers, Someone working from home connects through their own broadband, so their visit looks personal, not corporate.
Cloud and Hosting, Bots, crawlers and servers run in data centres, so the lookup names the host, not a buyer.
One at a Time, A manual lookup tells you about one address. Your website gets a stream of them every day.
Contaktly Does This for Every Visitor.
Add one snippet and Contaktly names the companies visiting your website in real time, filters out internet providers and bots, and shows what each company looked at.
From an Address to a Conversation.
What happens after the company is named.
- 01
Identify Companies
The company behind each visit, with industry, size and the pages it viewed. See how identification works
- 02
Find Decision-Makers
The people who decide at that company, with verified business emails. Find decision-makers
- 03
Convert on Autopilot
A personalised sequence that runs until the meeting is booked. How it converts
Live in Three Steps.
Most customers are live within minutes.
Create Your Free Account, No card and no sales call.
<script src="app.contaktly.com/embed.js" async></script> Installed on yourwebsite.comAdd One Snippet, Sign-up walks you through it, step by step.
Watch Companies Appear, Named, scored and ready to reach.
Questions, Answered.
What is a reverse IP lookup?
A reverse IP lookup takes an IP address and tells you who it belongs to: the organisation that owns the network, its location, and sometimes the company behind it. B2B teams use it to work out which businesses are visiting their website.
Can a reverse IP lookup always find the company?
No. It works best for companies with their own office network. People working from home, on mobile data or behind a VPN show up as their internet provider, not their employer, so those visits cannot be matched to a company from the IP address alone.
Is this tool free?
Yes. You can run up to 10 lookups a day without signing up. To identify every company visiting your website automatically, start a free Contaktly account.
Is a reverse IP lookup GDPR-compliant?
Looking up which organisation owns an IP address is company-level data. Contaktly identifies companies, not individual people, and is built for EU and UK data protection rules.
How is Contaktly different from a one-off lookup?
This tool checks one address at a time. Contaktly does it for every visitor to your website, filters out internet providers and bots, shows the pages each company viewed, and finds the decision-makers to contact.
See Every Company on Your Website.
Free account, no card needed. Live in minutes.
30-Day Guarantee on paid plans: no identifications, no bill.
