WHO.IS
Operator: Operator not identified
WHOIS, RDAP and DNS lookups with domain history, website monitoring, an API and MCP.
Technical Infrastructure
Product
WHO.IS: domain and IP lookups; historical reports, monitoring and API access are additional offerings.
Availability and source date
Active
As of: 16 October 2026.
No functionality test has been performed.
Use in OSINT research
Shows registration data, DNS records and available historical information for a domain. IP lookups return published holder and network data.
Queries
| Input | Result | Result type |
|---|---|---|
| Domain / website | WHOIS/RDAP data with registrar, registration dates and nameservers, plus DNS records. Full historical reports cost extra. | Retrieved |
| IP address | Public holder and network data for an IPv4 or IPv6 address. | Retrieved |
Features
- Shows registration data through WHOIS and RDAP.
- Queries a domain’s DNS records and nameservers.
- Provides historical WHOIS/RDAP reports as PDF and JSONL.
- Monitors availability, DNS changes and TLS certificates.
- Provides domain queries through an API and MCP.
Categories
- Technical Infrastructure
- Domains & WHOIS
- DNS
Coverage
Dataset
Public registration data from registries and registrars, plus a WHOIS/RDAP archive dating back to 2007.
Access
Requirements
Current web lookups without an account. An account and key are required for API/MCP access; an account is required for monitoring. Full historical reports cost extra.
Export
Historical report as a ZIP containing PDF and JSONL. The API returns JSON.
Provider
Unknown
Country of establishment
Unknown
Interfaces
API
Available. API access with a key; scope and allowances depend on the plan.
MCP
Available. Remote MCP at api.who.is/v1/mcp; uses the same key and consumes the same credits as the API.
AI agents
Available. MCP integration for compatible AI clients.
Usage note
The terms prohibit the sale, publication and redistribution of the products or services obtained.
Legal note
Limitations
- Registration data may be redacted or outdated. WHO.IS uses publicly available information.
- Full historical reports and live API updates are paid features.
- DNS and registration details do not confirm a person’s identity.
Guides and practical reports
Official · Domain Intelligence API: Quickstart
WHO.IS · EN
Explains API keys, queries and MCP integration.