IP Ninja
WHOIS JSON API
ViewDNS.info
WhoisXML API
ipinfo.io
DomainTools
SecurityTrails
Thread Notes
IP Ninja is a high-performance intelligence platform designed for cybersecurity professionals, threat hunters, and developers who need deep, structured insights into network infrastructure. Unlike standard tools that only provide real-time snapshots, IP Ninja leverages a massive internal database built through continuous passive DNS collection and active scanning to reveal the hidden history of the internet.
Core Technical Capabilities:
Enriched Reverse IP Lookup: Discover all known hostnames associated with any IPv4 or IPv6 address. Our engine goes beyond simple PTR records by providing historical associations that standard lookups miss.
Fully Parsed WHOIS Intelligence: Access clean, normalized JSON data for both IP ranges (RIR data from RIPE, ARIN, etc.) and domain names. No more manual parsing of messy raw text.
Infrastructure Mapping: Trace the evolution of a network by tracking how hostnames and IP assignments have changed over time.
Subdomain Enumeration: Effortlessly map a domainโs attack surface with our specialized internal discovery engine.
ASN & Geolocation: Gain precise context on every IP, including its Autonomous System (ASN), country, city, and geographic coordinates.
Developer-First API: Designed for seamless integration with clear JSON schemas, custom authentication headers, and ready-to-use documentation.
Actionable OSINT: Perfect for digital forensics, fraud prevention, and attack surface management.
Cost-Effective Scalability: Get professional-grade intelligence at a competitive price point, tailored for both independent researchers and growing security teams.
Transform simple IP addresses into rich, actionable intelligence. Whether you are investigating a threat or building the next generation of security tools, IP Ninja provides the data you need to see the full picture.
IP Ninja Thread NotesIP Ninja's answer
IP Ninja stands out by bridging the gap between real-time DNS queries and deep historical data. Unlike basic lookup tools, we maintain a massive internal database built from months of passive DNS collection, allowing users to uncover hostname associations that no longer exist in current live records.
IP Ninja's answer
Users choose IP Ninja for its developer-first approach and data structure. While competitors often return messy, raw WHOIS text, we provide 100% parsed and normalized JSON for both IP and domain data. Additionally, our pricing is designed to be accessible for independent researchers while offering professional-grade historical depth that is usually locked behind enterprise-level paywalls.
IP Ninja's answer
The primary audience consists of cybersecurity professionals, threat intelligence analysts, and DevOps engineers. It is also an essential tool for OSINT (Open Source Intelligence) researchers and fraud prevention teams who need to map out infrastructure or investigate the ownership and history of suspicious network assets.
IP Ninja's answer
IP Ninja was born out of a practical need in the cybersecurity field. Most existing tools were either too expensive for individual researchers or too simplistic, offering only surface-level "live" data. We built IP Ninja to provide a more transparent and deeper view of the internet's infrastructure, focusing on the "memory" of IP addresses to help experts connect the dots in complex investigations.
IP Ninja's answer
IP Ninja is built on a high-performance stack optimized for massive data ingestion and low-latency API responses. Our core infrastructure utilizes advanced databases for historical DNS mapping, high-speed scanning engines for real-time probing, and a RESTful API architecture that delivers structured JSON payloads via secure HTTPS.
WHOIS JSON API - Platform provides domains registration info (WHOIS) in JSON format
ViewDNS.info - Free DNS related tools including Reverse IP Lookup, DNS Propagation Checker, Chinese Firewall Test...
WhoisXML API - Domain, IP, and DNS data provider
ipinfo.io - Simple IP address information.
DomainTools - Domain name research, including comprehensive Whois Lookup, Reverse Whois Lookup and Whois History.
SecurityTrails - Dive into our data, search now! We offer robust APIs & data services for Security Teams worldwide.
