# WhoisXML API

> Publicly sourced profile assembled by Optimly, in the Optimly AI Brand Index. Last refreshed 2026-10-04.

- **Business Profile:** https://optimly.ai/brand/whoisxml-api
- **Dataset:** https://optimly.ai/brand/whoisxml-api.json
- **Markdown:** https://optimly.ai/brand/whoisxml-api/llms.txt
- **Official website:** https://whoisxmlapi.com
- **Slug:** whoisxml-api
- **Categories:** cybersecurity

## Overview

- **Tagline:** An extensive and continuously updated repository of historical and real-time domain, IP, and DNS intelligence, boasting over 28.7 billion historic WHOIS records, 50 billion domains and subdomains, 116 billion DNS records, covering 99.5% of IP addresses in use, and trusted by over 60% of the Cyber 150 in key categories.
Source: Brand's website (https://whoisxmlapi.com) · 2026-10-04

- **Description:** WhoisXML API collects, aggregates, and delivers domain, IP, and DNS intelligence to enhance Internet transparency and security. Their data feeds and APIs are used by commercial security platforms (SIEM, SOAR, TIP, ASM), law enforcement, MSSPs, and SOCs for threat detection and response, third-party risk management, identity access management, fighting cybercrime, brand protection, phishing detection, and monitoring global domain activity.
Source: Brand's website (https://whoisxmlapi.com) · 2026-10-04

## Offerings

- **Core capabilities:**
  - Domain WHOIS Intelligence
  - Passive DNS Intelligence
  - IP Geolocation Intelligence
  - and IP Netblocks Intelligence delivered via comprehensive data feeds
  - readily integratable APIs
  - and professional research/monitoring tools. Specialized packages include Predictive Threat Intelligence and Internet Infrastructure intelligence.
Source: Brand's website (https://whoisxmlapi.com) · 2026-10-04

- **Pricing:** API trial available, with subscription-based models for data feeds and APIs, and custom enterprise packages.
Source: Brand's website (https://whoisxmlapi.com) · 2026-10-04

## Audience

- **Target industry:** Commercial security platform providers (SIEM, SOAR, TIP, ASM), law enforcement agencies, Managed Security Service Providers (MSSPs), Security Operations Centers (SOCs), Fortune 1000 companies, SMBs, digital marketers, business development managers, researchers, brand managers, and legal specialists.
Source: Brand's website (https://whoisxmlapi.com) · 2026-10-04

Page last updated 2026-10-17.