500M+ domains indexed

Hosted Domains

Discover all domains hosted on any IP address or hosting provider. Reverse-map IPs to their full domain portfolio in milliseconds.

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Capabilities

Key Features

Everything you need to investigate shared hosting environments and map IP address portfolios.

Shared Hosting Discovery

Find every domain co-hosted on a shared server. Identify all tenants on a single IP address instantly.

Historical Hosting Data

Access historical records showing which domains were previously hosted on an IP, even after they moved.

IP to Domain Reverse Mapping

Precise reverse DNS and HTTP-based mapping to associate IP addresses with their hosted domain names.

500M+ Domains Indexed

Our crawlers continuously index over 500 million domains, ensuring comprehensive coverage across the web.

Bulk IP Queries

Submit up to 1,000 IP addresses in a single API call. Ideal for large-scale security audits and research.

Threat Neighbourhood Analysis

Assess the risk profile of every co-hosted domain to detect malicious neighbours on shared infrastructure.

Response Schema

Data Fields

All fields returned in the /v2/ip/{ip}/hosted endpoint response.

Field	Type	Description
`ip`	string	The queried IPv4 or IPv6 address
`total_domains`	integer	Total number of domains hosted on this IP address
`domains`	array	Paginated list of domain names hosted on this IP
`page`	integer	Current page number (starts at 1)
`per_page`	integer	Number of domains returned per page (max 100)

Live Demo

See It In Action

Enter any IP address to see all domains hosted on it.

{
  "ip": "104.21.44.121",
  "total_domains": 1247,
  "page": 1,
  "per_page": 25,
  "domains": [
    "example.com",
    "mysite.net",
    "shopfront.io",
    "devblog.co",
    "agencysite.com",
    "..."
  ]
}

Applications

Use Cases

Security Investigation

Identify all domains hosted on a known malicious IP. Uncover hidden threat infrastructure and find related malicious sites sharing the same server.

Malware distribution network mapping
Phishing site cluster detection
C2 infrastructure analysis

Competitive Research

Discover which hosting providers your competitors use and what other domains share their infrastructure. Benchmark hosting choices in your industry.

Competitor hosting analysis
Market share research
Hosting provider benchmarking

Hosting Verification

Verify that your domains are correctly pointed to the right servers. Audit your hosting portfolio and detect unexpected domain co-location.

DNS migration verification
Hosting audit & compliance
Portfolio management

Integration

API Reference

Integrate hosted domain lookups into your app in minutes.

# Get all domains hosted on an IP address
curl -X GET "https://api.hostinfo.com/v2/ip/104.21.44.121/hosted?page=1&per_page=25" \
  -H "Authorization: Bearer YOUR_API_TOKEN" \
  -H "Content-Type: application/json"

// Get all domains hosted on an IP address
const response = await fetch(
  'https://api.hostinfo.com/v2/ip/104.21.44.121/hosted?page=1&per_page=25',
  {
    headers: {
      'Authorization': 'Bearer YOUR_API_TOKEN'
    }
  }
);
const data = await response.json();
console.log(data.total_domains, data.domains);

# Get all domains hosted on an IP address
import requests

response = requests.get(
    'https://api.hostinfo.com/v2/ip/104.21.44.121/hosted',
    headers={'Authorization': 'Bearer YOUR_API_TOKEN'},
    params={'page': 1, 'per_page': 25}
)
data = response.json()
print(data['total_domains'], data['domains'])

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