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.

Discover what you really pay for when buying commercial Internet intelligence data.

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Specifications Pricing
Data streaming Output format

Data streaming

This data feed subscription is licensed to you or your organization only, you may not resell or relicense the data without explicit written permission from Whois API, Inc. Any violation will be prosecuted to the fullest extent of the law.

Update time

The data is provided immediately after being processed by our system.

Supported TLDs

How to obtain data from the Domain Registration Stream

  • First of all, you need an API key with a valid Real-time Domain Registration Streaming subscription.
  • Connect to the wss://nrd-stream.whoisxmlapi.com/ultimate endpoint and send your API key as a first message:
    • $ websocat --no-line -B 1100000 wss://nrd-stream.whoisxmlapi.com/ultimate
[INFO  websocat::stdio_threaded_peer] get_stdio_peer (threaded)
[INFO  websocat::ws_client_peer] get_ws_client_peer
[INFO  websocat::ws_client_peer] Connected to ws
ENTER_YOUR_API_KEY
  • In the example above, we used the websocat open source console utility. The “-B” parameter specifies the size of the buffer (a little over 1 MB is recommended).
  • We strongly recommend that you use WebSocket clients that comply with RFC 6455 and support ping-pong communication by default.

Optional input parameters

omitRaw

If 1, the following raw fields will be empty: registryDataRawText, registrantContact_rawText, whoisRecordRawText, administrativeContact_rawText, billingContact_rawText, technicalContact_rawText, zoneContact_rawText.

Example: wss://nrd-stream.whoisxmlapi.com/ultimate?omitRaw=1

Acceptable values: 0 | 1

Default: 0
includeCandidates

If 1, the stream will be enriched with simplified domain records obtained directly from zone files before they undergo complete NRD processing. These candidate records contain only two fields: domainName and reason (which can be either "added" for newly registered domains or "dropped" for recently removed domains).

These candidate domains are reported as soon as they are detected in zone files, providing faster notification of domain registrations and removals. Most candidate domains will be reported again after completing the full NRD processing pipeline, potentially with a different reason value based on WHOIS record comparison. Some domains may not appear in the second report if an identical WHOIS record was already identified or if the WHOIS record could not be retrieved.

Example: wss://nrd-stream.whoisxmlapi.com/ultimate?includeCandidates=1

Acceptable values: 0 | 1

Default: 0