The Swiss Army Knife for IP Intelligence. Extensive WHOIS Archives, Subdomain Discovery, and Historical IP-to-Domain Records through a single, lightning-fast API.

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Enterprise-grade intelligence for everyone.

Powerful features for IP analysis

We’ve built a robust database of IP and domain records accessible to researchers, hunters, and teams of all sizes. Get the high-velocity data you need to map infrastructure without the enterprise price tag.

Reverse IP & History

Access current and historical domain names associated with any IP address to track infrastructure changes.

Unified WHOIS Lookup

Retrieve comprehensive registration details, ownership records, and contact information for both IP addresses and domain names.

Subdomains Lookup

Map the attack surface by discovering active subdomains and hidden hostnames for any given domain name.

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Choose the perfect plan for your needs

Pricing

What would be a ninja without his favorite weapon ?
Select from our flexible pricing plans to get started with IP Ninja.

Shuriken Plan Ã

$5/month

Try 7 days free

Ideal for individuals and small businesses

  • Reverse IP lookup
    Up to 100 hostnames returned
  • Subdomains Lookup
    Up to 100 hostnames returned
  • WHOIS on IP addresses
  • WHOIS on domain names (Beta)
    5 requests per hour (~3600/month)
  • IP geolocation
  • DNS lookup
  • ASN lookup
  • Reverse ASN Lookup

General limit: 100 req/hour per endpoint (up to 74400 requests/month)

Saï Plan Ò

$20/month

Get started

Perfect for growing businesses

  • Reverse IP lookup
    Up to 500 hostnames returned
  • Subdomains Lookup
    Up to 500 hostnames returned
  • WHOIS on IP addresses
  • WHOIS on domain names (Beta)
    50 requests per hour (~18000/month)
  • IP geolocation
  • DNS lookup
  • ASN lookup
  • Reverse ASN Lookup

General limit: 500 req/hour per endpoint (up to 372K requests/month)

Katana Plan Ñ

$100/month

Get started

Designed for enterprise-level usage

  • Reverse IP lookup
    Up to 3K hostnames returned
  • Subdomains Lookup
    Up to 3K hostnames returned
  • WHOIS on IP addresses
  • WHOIS on domain names (Beta)
    125 requests per hour (~90000/month)
  • IP geolocation
  • DNS lookup
  • ASN lookup
  • Reverse ASN Lookup
    Up to 3K hostnames returned

General limit: 3000 req/hour per endpoint (up to 2232K requests/month)


Discover who's behind any IP address or Domain

Uncover the hidden details of the internet's infrastructure. IP Ninja was built by security enthusiasts to provide fast, reliable, and affordable data for the next generation of cyber-tools.

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Frequently asked questions

If you are looking for more technical information or anything tied to subscriptions please check our detailed information page.

Can’t find the answer you’re looking for? Reach out to our customer support team.

What is a reverse IP lookup?
A reverse IP lookup is a process that unveils all hostnames hosted on a specific IP address.
Are rate limits shared across endpoints?
No. Each endpoint (Geoloc, Reverse IP, WHOIS, etc.) has its own independent rate limit. This allows you to perform intensive infrastructure mapping without exhausting your entire quota on a single type of request.
What is a reverse ASN lookup?
An Autonomous System Number (ASN) is a unique identifier assigned to a network on the Internet. It encompasses one or more ranges, each representing a distinct segment. A reverse ASN lookup involves finding all hostnames hosted on those network ranges.
What is the "Domain WHOIS" Beta?
Our domain WHOIS lookup is currently in Beta. While we support most major TLDs, you might experience slight latency or find that certain obscure extensions are not yet fully supported. We are constantly expanding our coverage.
Who can benefit from IP Ninja's services?
Cybersecurity professionals, bug bounty hunters, and cybersecurity enthusiasts will find our reverse IP/ASN lookups and subdomain enumeration services valuable. Developers may also be interested in our geolocation and DNS lookup services.
Is IP Ninja easy to use?
Yes, using IP Ninja's API is easy. You can effortlessly retrieve valuable data with just HTTP GET requests, seamlessly integrating your API key in the header for easy access to powerful insights. Check out the API documentation.
Do you provide a web interface to query the data?
While IP Ninja is a developer-first API, you can use our Interactive API Documentation. It provides a web-based interface (Swagger) where you can test all endpoints, authorize your API key, and visualize results directly in your browser without writing a single line of code.