IP2WHOIS Information Lookup

About IP2WHOIS Information Lookup

IP2WHOIS.com provides domain WHOIS lookup services, offering access to registrant details, registrar records, key dates, and domain status. The service is built around two APIs: a Domain WHOIS API that retrieves domain ownership, registrar, location, and status information for tracking, research, and compliance purposes, and a Hosted Domain API that identifies all domains hosted on a specific IP address for network mapping and threat intelligence.

The service provides RESTful API access with JSON responses, real-time data with global TLD coverage, and supports reverse IP lookups for both IPv4 and IPv6 addresses. SDKs are available for multiple programming languages including PHP, Ruby, Python, Node.js, Go, Deno, Kotlin, .NET, Java, Lua, Erlang, D, Scala, OCaml, and R, along with integrations for platforms such as Make, Pipedream, Zapier, and others, plus bots for Slack, Discord, Reddit, Telegram, and Webex.

The product targets cybersecurity teams detecting malicious domains and monitoring threat actors, investigators and analysts uncovering domain ownership and connections, enterprises and SaaS providers verifying domain legitimacy and reducing fraud, and researchers and developers integrating domain data into tools and platforms. It also offers a free web-based domain WHOIS lookup tool in addition to the APIs.

Key features

• Domain WHOIS lookup for registrant, registrar, key dates, and status
• Hosted Domain API to discover all domains hosted on a specific IP address
• Reverse IP lookups for both IPv4 and IPv6
• RESTful API with JSON responses for automation and integration
• SDKs available for PHP, Ruby, Python, Node.js, Go, and other languages
• Integrations with Make, Pipedream, Zapier, and command line tools

Frequently asked questions