The Swiss Army Knife for IP Intelligence.
Extensive WHOIS Archives, Subdomain Discovery, and Historical IP-to-Domain Records through a single, lightning-fast API.
Enterprise-grade intelligence
Powerful tools for infrastructure analysis
We’ve built a robust database of IP and domain records accessible to researchers, hunters, and teams of all sizes. Get high-velocity data without the enterprise price tag.
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Reverse IP & History
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Access current and historical domain names associated with any IP address to track infrastructure changes over time.
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Unified WHOIS
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Retrieve comprehensive registration details, ownership records, and contact information for both IP addresses and domains.
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Subdomains Enumeration
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Map full attack surfaces by discovering active subdomains and hidden hostnames for any given organization domain.
Choose your weapon
Velocity-Based Pricing
High-velocity infrastructure intelligence. Pick the plan that scales with your research needs.
Shuriken
Ã- Reverse IP & History 100 req / hr
- Subdomain Lookup 100 req / hr
- Domain WHOIS (Beta) 5 req / hr
- IP WHOIS & Geoloc 100 req / hr
- DNS & ASN Intel 100 req / hr
- Reverse ASN Lookup Not included
Saï
Ò- Reverse IP & History 500 req / hr
- Subdomain Lookup 500 req / hr
- Domain WHOIS (Beta) 50 req / hr
- IP WHOIS & Geoloc 500 req / hr
- DNS & ASN Intel 500 req / hr
- Reverse ASN Lookup Not included
Katana
Ñ- Reverse IP & History 3,000 req / hr
- Subdomain Lookup 3,000 req / hr
- Domain WHOIS (Beta) 125 req / hr
- IP WHOIS & Geoloc 3,000 req / hr
- DNS & ASN Intel 3,000 req / hr
- Reverse ASN Lookup 3,000 req / hr
Need more scale? Contact us for custom enterprise quotas
* All rate limits are independent per endpoint and reset every hour.
Our Philosophy
Intelligence without Compromise
IP Ninja was built by a distributed collective of security researchers who believe that high-quality infrastructure data should be accessible, private, and developer-friendly.
- Developer Centric
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Built for automation. Our APIs are designed to be integrated into your CI/CD pipelines, SOC workflows, or custom tools with zero friction.
- Privacy First
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We don't track your investigations. Your queries are never sold to third parties, and we maintain a strict no-log policy for your intelligence operations.
- Fair Access
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Intelligence shouldn't be a luxury. We offer competitive, transparent pricing that scales with your needs, from solo hunters to growing startups.
Frequently asked questions
If you are looking for more technical information or anything tied to subscriptions, please check our detailed help 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.