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DomainTools Whois Lookup

Operator: DomainTools LLC, United States

Shows WHOIS data, registrars, registration dates and technical details for domains or IP addresses.

Technical Infrastructure

Open website

Product

Public DomainTools Whois Lookup. Advanced memberships, Iris and DNSDB are separate offerings.

Availability and source date

Active

As of: 16 October 2026.

No functionality test has been performed.

Use in OSINT research

A domain or IP address provides registration and infrastructure leads. Registrars and nameservers help with the next research step; hidden registrant details remain hidden.

Queries

InputResultResult type
Domain / websiteWHOIS registration, registrar, registration and expiry dates, nameservers and additional domain profile data, where available.
Retrieved
IP addressWHOIS ownership and registration details for the IP address range, where included in the record.
Retrieved

Features

  • Shows WHOIS registration data for domains and IP addresses.
  • Adds profile details such as IP addresses and nameservers to domain results.
  • Shows the registration status of the same name under other domain extensions.
  • Links from results to separate tools for history and connections.

Categories

  • Technical Infrastructure
  • Domains & WHOIS
  • IP & ASN

Coverage

Dataset

WHOIS records and additional DomainTools infrastructure data for domains and IP addresses. The available scope depends on the registration record concerned.

Access

Requirements

Basic lookup without an account. Some further tools provide only a preview without signing in; memberships are separate.

Export

Web view. Separately licensed WHOIS API access returns JSON, XML or HTML.

Provider

DomainTools LLC

Country of establishment

United States

Interfaces

API

Limited availability. The WHOIS Lookup API is documented but requires separate authenticated API access. It is not included in the free web lookup.

MCP

Not documented. No MCP access is described for the free WHOIS web lookup. The provider’s MCP is for Iris, DNSDB and Domain History.

AI agents

Not documented. No AI agent integration is described for the free WHOIS web lookup. The documented MCP integration concerns separate platform products.

Usage note

The standard terms restrict access to your own personal or internal purposes. A separate enterprise agreement may define different rights.

Registration data may contain personal information. Storage and sharing are subject to data protection rules and the applicable terms of use.

Limitations

  • Protected WHOIS data may conceal the actual registrant’s name and contact details.
  • History, further queries and enterprise features are separate offerings.
  • API data may be several days old; the record’s timestamp determines its currency.

Guides and practical reports

Sources

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