Whoisology
Operator: Operator not identified
WHOIS archive for historical domain registrants and connections between domains.
Technical Infrastructure
Product
Whoisology
Availability and source date
Active
As of: 16 October 2026.
No functionality test has been performed.
Use in OSINT research
Helps find earlier domain registrations and other domains associated with a known email address. The data comes from a collected WHOIS archive, not a current registry query.
Queries
| Input | Result | Result type |
|---|---|---|
| Domain / website | Archived WHOIS records and connections to other domains. | Retrieved |
| Email address | Domains with this email address in the stored WHOIS contacts. | Retrieved |
| Keyword / free text | Domain names containing the search term. | Retrieved |
Features
- View earlier WHOIS data and registration changes for a domain.
- Find domains sharing email addresses or other WHOIS contact details.
- Search domain names using complete or partial keywords.
- Narrow results by WHOIS fields and contact roles.
- Download domain lists and reports; scope and costs depend on the plan.
- Use the API allowances included in paid plans.
Categories
- Technical Infrastructure
- Domains & WHOIS
Coverage
Dataset
A proprietary, collected historical WHOIS dataset. No live query of a primary registry. The provider states that updates occur every few months.
Access
Requirements
Visitor is free. Registration is offered; paid accounts expand search pages, archives and search credits.
Export
Domain lists and reports for download. A separate WHOIS database download in CSV and MySQL is offered on request.
Provider
Unknown
Country of establishment
Unknown
Interfaces
API
Available. The pricing page lists 500, 1,750 or 5,500 API credits per month in the paid plans. No public technical documentation is linked.
MCP
Not documented. Not described in the provider information reviewed.
AI agents
Not documented. Not described in the provider information reviewed.
Usage note
The terms restrict viewing, copying and downloading content to your own non-commercial purposes. Automated website access and scraping may lead to suspension. Using the data for mass advertising is prohibited.
Legal note
Limitations
- According to the provider, the collected data is updated every few months and is not a live WHOIS service.
- Shared contact details are a research lead, not proof of current ownership.
- Historical data and search allowances depend on the plan.
Guides and practical reports
Official · Whoisology: Research domains, email addresses and keywords
Whoisology · 03/2019 · EN
Historical guide from 2019 covering search types, WHOIS archives, contact filters and downloads.