Reverse WHOIS CLI
Reverse WHOIS CLI: A capable command-line tool for current and historic Reverse WHOIS research. Ranked #15 of 25 in Reverse WHOIS Search Tools by our editors (7.7/10); pricing: Open source; best for technical users comfortable with open source.
At a glance
- Editor score7.7 / 10
- PricingOpen source
- Best forTechnical users comfortable with open source
- Paid fromFree
- Historical recordsYes
- Facts checked21 Sep 2026
Where it wins
- Searches current or historic WHOIS records by one or multiple terms
- Supports files, standard input, exclusions, proxies, and concurrent workers
- Provides rate limiting and deduplicated file output
Where it doesn't
- Requires an API key for the commercial WhoisXML API endpoint
- Command-line workflows may not suit nontechnical teams
- Output depends on the connected Reverse WHOIS service
Our verdict on Reverse WHOIS CLI
Reverse WHOIS CLI is an open-source Go command-line tool for cybersecurity analysts, threat-intelligence workflows, OSINT enrichment, and vendor or brand footprint discovery. It searches indexed WHOIS records using one or multiple terms, with support for both current and historic data. Targets can come from command-line flags, files, or standard input, making it suited to technical users who work with repeatable research workflows and bulk inputs.
The CLI itself is free and open source, but requests use the commercial WhoisXML API Reverse WHOIS endpoint and require an API key. Its search workflow includes preview counts and domain-list modes, helping users inspect a query before requesting results. Exclusion filters narrow results, while HTTP/HTTPS and SOCKS5 proxy support adds control over request routing. Concurrent workers and global rate limiting provide configuration options for larger searches without removing request pacing from the workflow.
Reverse WHOIS CLI is strongest when a team wants scriptable search controls rather than a graphical investigation interface. Deduplicated file output is useful for downstream analysis, and support for current and historic records broadens the research scope beyond a single live lookup. Users should choose it when they are comfortable with command-line tooling, API-key configuration, and external service requirements. Those seeking a standalone product without an API dependency, or a simpler interface for occasional searches, should consider an alternative.
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Reverse WHOIS CLI pricing
Reverse WHOIS CLI fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Free |
| Person/name search | Not verified |
| Organization search | Yes |
| Email search | Yes |
| Historical records | Yes |
| Bulk search | Yes |
| API access | Yes |
| Result limit | Not verified |
| Deployment | Self-hosted |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Open source |
| Website | github.com |
| Facts checked | 21 Sep 2026 |
Alternatives to Reverse WHOIS CLI
- WhoisXML API Reverse WHOISA flexible reverse-WHOIS service for current, historical, and large-scale domain investigations.9.4
- WhoxyA broad WHOIS data service for high-volume API, reverse search, and bulk lookup work.9.2
- WhoisologyA focused research tool for tracing domain ownership, connections, and historical records.9.0
See all Reverse WHOIS CLI alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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