Products APIs Data Feeds Web Tools Domain Research & Monitoring Enterprise Packages AI Deep Research
WHOIS / WHOIS History
WHOIS / WHOIS History

Provide current and historical ownership information on domains / IPs. Identify all connections between domains, registrants, registrars, and DNS servers.

DNS / DNS History
DNS / DNS History

Look into all current and historical DNS / IP connections between domains and A, MX, NS, and other records. Monitor suspicious changes to DNS records.

IP Geolocation / IP Netblocks
IP Geolocation / IP Netblocks

Get detailed context on an IP address, including its user’s geolocation, time zone, connected domains, connection type, IP range, ASN, and other network ownership details.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Access our web-based solution to dig into and monitor all domain events of interest.

Domain Research Suite (DRS)
Domain Research Suite (DRS)

Get access to a web-based enterprise-grade solution to search and monitor domain registrations and ownership details for branded terms, fuzzy matches, registrants of interest, and more.

New gTLD Intelligence Services (NGIS)
New gTLD Intelligence Services (NGIS)

Independent, evidence-based DNS and abuse intelligence for applicants, advisors, governments, and counsel participating in the ICANN 2026 New gTLD Program.

Research
Monitoring
White-Label
Predictive Threat Intelligence Feeds
Predictive Threat Intelligence Feeds

Predictive threat intelligence is your best first line of defense. Subscribe to the feeds to strengthen your cybersecurity posture. Contact us today for more information.

WhoisXML API Internet Infrastructure
Internet Infrastructure

Unlock integrated intelligence on Internet properties and their ownership, infrastructure, and other attributes.

Enterprise API Packages
Enterprise API Packages

Our complete set of domain, IP, and DNS intelligence available via API calls as an annual subscription with predictable pricing.

Security Intelligence (SI) Suite
Security Intelligence (SI) Suite

Offers complete access to WHOIS, IP, DNS, and subdomain data for product enrichment, threat hunting and more.

Attack Surface Discovery API
Attack Surface Discovery API

Uncover entire attack surfaces with this API to embed asset discovery, vulnerability scanning, and technology metadata into your platform. Now in early access.

MCP Server
MCP Server

Talk to our APIs using LLMs. Connect your preferred LLM to WhoisXML API and simply chat about WHOIS, DNS, threat intelligence, and more.

Jake AI
Jake AI

I’m your Domain Intelligence Assistant. I make it easy to explore WHOIS, DNS, and threat data from WhoisXML API — I’m cloud-based, fast, and always ready to help.

WhoisXML API Domain Intelligence Advisor (via ChatGPT)
WhoisXML API Domain Intelligence Advisor (via ChatGPT)

A custom GPT for WHOIS, DNS, IP, and threat intelligence research. Connects ChatGPT directly to WhoisXML API to enable fast, conversational investigations and domain insights.

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One Universal API Credit Pool

Simplify API credit purchasing and usage with one balance that works across our product portfolio.

Start from $129/month
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Datafeed files Output format Supported categories

Datafeed files

A website categorization database is a database that classifies and categorises websites based on their content, purpose and other characteristics. The purpose of website categorization is to provide users with information about the nature of a website, helping them to make informed decisions about accessing or interacting with it. Our Website Categories Database supports 704 categories.

The dataset comes in the two following forms

1. Daily Website Categorization Datafeed

The Daily Datafeed delivers newly registered domains. It is not a refresh of the entire database — the complete database is delivered separately, as a full snapshot on a weekly cycle.

Data for Daily Website Categorization Datafeed is obtained from Newly Registered Domains Data Feed. This approach helps to keep the database up to date.

  • Data included: domain, ASN, categories, domain created date (WHOIS), website responding (true/false) and country code.
  • Filename format: categories.%DATE%.[csv|json].gz
  • Average file sizes:
File Gzip size Unpacked size Rows
categories.%DATE%.daily.csv.gz 50MiB 250MiB 1.5M
categories.%DATE%.daily.json.gz 60MiB 500MiB 1.5M

2. Custom Website Categorization Database

You can configure your own dataset with your desired categories and countries. All updates from the Daily Website Categorisation Datafeed are guaranteed to hit the dataset for at least 24 hours after the daily release.

  • Data included: domain, ASN, categories, domain created date (WHOIS), website responding (true/false) and country code.
  • Filename format: categorization_db.%DATE%.%DATASET_ID%.categories.[csv|jsonl].gz

How to download the datafeed files

Recommended decompression tool

When working with large compressed files, we recommend using unpigz rather than gunzip. Based on our performance tests, gunzip can be almost 2x slower than unpigz for large files. For this reason, unpigz is the preferred decompression tool.

Downloading via HTTPS

Note: if the IP allowlist is enabled in your account settings, HTTPS downloads are accepted only from the listed IP addresses; other requests are rejected with 403 "Your IP address is not on the allowlist".

Downloading via FTP

  • Host: datafeeds.whoisxmlapi.com
  • Port: 21210
  • Username: 'user'
  • Password: equal to your personal API Key which you can obtain from the My Products page.
  • Base path: ftp://datafeeds.whoisxmlapi.com:21210
  • Folder: Website_Categorization_Database or Website_Categorization_Custom

Note: if the IP allowlist is enabled in your account settings, it applies to data feed downloads as well as to API calls: FTP, FTPS and HTTPS requests from IP addresses that are not on the list are rejected with 403 "Your IP address is not on the allowlist". Add the IP addresses of every machine that downloads the data feeds before enabling it.

Downloading via FTPS

Read more about the FTPS connection: https://en.wikipedia.org/wiki/FTPS.

Our FTP server supports explicit FTP over TLS encryption. You may configure your FTP client to use explicit FTP over TLS encryption for secure communications.

Our FTPS server is accessed using the same paths and API keys as a regular FTP server, the instructions for which are described above. To connect via FTPS, select the "Require explicit FTP over TLS" encryption option in your FTP client, if it supports it. FileZilla configuration example:

explicit FTP over TLS encryption