What is IP to hosted domains?

IP to hosted domains reveal all the domains that are hosted on one IP address.

How many distinct domains can be hosted at a single IP address?

A single IP can host limitless domains.

Why is IP to hosted domain information important?

IP to hosted domain information helps cybersecurity develop threat intelligence by discovering associated domains that are tied to one IP address owner. Marketing teams and other organizations use the IP to hosted domain API to protect their domain reputation and site ranking.

What’s the difference between reverse DNS lookups and IP to hosted domain lookups?

Reverse DNS lookups determine the hostname associated with an IP address. IP to hosted domain lookups reveal domains associated with an IP, which offers a greater level of detail.

Is there a limit on API requests?

The IP to hosted domains API is part of our business tier package, which has a limit of 500,000 API requests per month.

Who can benefit from using this API?

Cybersecurity professionals, SEO specialists, network administrators, digital forensics teams, and threat intelligence experts can all benefit from using IPinfo’s IP to hosted domain API.

What are common use cases for this data?

IP to hosted domain data can help identify spam domains and suspicious IPs, understand network issues, identify potential fraud, and deliver targeted content.

IP to Hosted Domains

Uncover Critical Web Infrastructure

IP to hosted domain data identifies which domains are hosted on the same IP address

{
  ip:"96.99.227.0",
  total:9,
  domains:[
    "comcast.com",
    "comcast.net",
    "yourjobyourtomorrowyourcomcast.com",
    "xfinity.net",
    "comcastnbcuniversallistens.com"
  ]
}

Comprehensive, Detailed Data

Understand web infrastructure with precision using IPinfo’s IP to hosted domains data. Our service provides the total count of domains hosted on an IP address, along with a ranked list of 5 to 1,000 domains, powered by host.io domain ranking. This information helps enhance cybersecurity investigations, optimize network performance, enable targeted marketing, and much more.

Flexible Access Options

API, database download, and platform integrations—built for any stack, any scale.

Reliable IP Intelligence

Industry-leading precision, daily updates, and trusted accuracy for every IP address.

Built for Developers

Official libraries, clean docs, and powerful APIs designed for real-world deployment.

Two ways to use it · one team behind you

Built for rapid, accurate development

Query it live through the API, or download a database sample and contact sales for full access.

Fast and Easy API Access

Gain access to our best-in-class data. Setup takes just a few minutes.

$ curl https://ipinfo.io/96.99.227.0/json?token=$TOKEN

{
  domains:{
    ip:"96.99.227.0",
    total:17744,
    domains:[
      "comcast.com",
      "comcast.net",
      "nbcuniversallistens.com",
      "herbogzone.com",
      "comcastlistens.com"
    ]
  }
}

50-200 ms response time on average
99.999% uptime
Data updates every 24 hours

Choose your plan

Database Download Sample

Choose a format

csv14M entries · updated Aug 4, 20261.34 GBjson14M entries · updated Aug 4, 20261.36 GBmmdb14M entries · updated Aug 4, 20263.48 GBparquet14M entries · updated Aug 4, 20261.69 GB

Download CSV sample

Get the Full Database

Like what you see in the sample above? Contact sales for full dataset access — custom data coverage, premium support, and seamless migration.

Customizable fields
Data updates every 24 hours

How to get our IP to Hosted Domains data

Compare features across IPinfo's products. Choose what best fits your use case — hosted domains data is available exclusively with business and custom plans for users who need the number and list of domains hosted on an IP address.

Key feature	IPinfo Lite	IPinfo Core	IPinfo Max
Total Domains Number of domains registered to the IP Address
List of Domains Name of the domain(s) under the IP address
	Learn more	Learn more	Learn more

How People Use IP to Hosted Domains Data

IP to hosted domains data powers everything from threat investigations to infrastructure mapping. By revealing which domains are hosted on a given IP, teams can gain faster, deeper insight into ownership, relationships, and potential risks. Here’s how top companies put IPinfo’s IP-to-hosted domains data to work:

Threat Intelligence

Uncover malicious infrastructure by identifying all domains linked to suspicious IPs, accelerating threat hunting and incident response.

Brand Protection

Detect unauthorized or infringing domains hosted on shared infrastructure to protect intellectual property and prevent abuse.

Infrastructure Analysis

Map shared hosting environments and related domains (competitors and industry leaders) to better understand hosting patterns, dependencies, and risks.

Made for Developers, Trusted by Enterprises

Our expert in-house team diligently maintains and supports our IP to Hosted Domains, ensuring you always have accurate, up-to-date IP data at your fingertips. With libraries for more than a dozen popular programming languages—from Ruby to Rust and PHP to Perl—integrating our API is quick and seamless. Explore our developer docs to see just how easy it is to get started.

IPinfo.io helped us tremendously to gain market insights about the hosting and datacenter industry.
Jan LöfflerCTO at Plesk

Since using IPinfo's data products, we identify and remove traffic of 204% more unwanted IP sources than with previous open-source solutions.
Daniel FischerCEO at Froyoo

IPinfo.io helped us tremendously to gain market insights about the hosting and datacenter industry.
Jan LöfflerCTO at Plesk

Since using IPinfo's data products, we identify and remove traffic of 204% more unwanted IP sources than with previous open-source solutions.
Daniel FischerCEO at Froyoo