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WHOIS APIs Enhance Cyber Threat Investigation Capabilities

WHOIS APIs Enhance Cyber Threat Investigation Capabilities

First seen 11 Apr 2026, 09:09 UTC • •

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ThreatCluster AI
ThreatCluster •April 12, 2026 at 01:03 UTC
  • •WHOIS History API tracks domain ownership changes over the past 10 years.
  • •Reverse WHOIS API links domains to individuals or organizations for fraud detection.
  • •Both APIs provide structured data formats for easy integration into security systems.

Two new APIs, WHOIS History API and Reverse WHOIS API, have been launched to assist cybersecurity professionals in tracking domain ownership and connections. The WHOIS History API allows users to check historical WHOIS records for the past 10 years, enabling the identification of past domain owners and potential online fraud. It is particularly useful for security researchers and web designers recovering lost domains. The Reverse WHOIS API enables users to find all domain names associated with a specific individual or organization, aiding in brand protection and fraud prevention. Both APIs provide structured data in XML and JSON formats, making integration into existing systems straightforward. The tools are expected to significantly enhance investigations into cybercrime and online threats. Users can access 500 free API credits without requiring a credit card. The launch of these tools reflects a growing need for comprehensive domain intelligence in the cybersecurity landscape.

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Updated 182d ago How this analysis works

Timeline

2026-04-11
WHOIS History API and Reverse WHOIS API launched
2026-04-11
500 free API credits available for users

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