Tool profile
Subfinder
Discover subdomains from passive sources
Claims and corrections are reviewed before public profile changes.
Signal summary
Trust / disclosure
How to read this profile
Editorial line
Editorial judgment and commercial context are kept separate on OSINT4ALL.
Review status
This profile has an editorial review date. Source checking does not mean the tool was hands-on tested.
Claims / submissions
Corrections and claim requests are reviewed before any public change is made.
Commercial context
No commercial relationship is disclosed on this profile.
Editorial verdict
Use case and fit
This is editorial guidance, not vendor copy.
Generating an initial domain inventory before validation and historical research.
Free software; upstream data-provider subscriptions or API keys may still be required.
Best for generating an initial domain inventory before validation and historical research.
Operational snapshot
Workflow, access, and coverage
DNS and domain infrastructure intelligence, Passive reconnaissance automation
Domain, Hostname, IP Address, Organization, ASN
DNS Record, Subdomain, Nameserver History, Infrastructure Link, Aggregated Lead Set
Discovery, Enrichment, Pivoting
Confirm the root domain and scope; configure allowed sources; save structured output and time; deduplicate; check DNS and certificate context; separate historic from current records.
English-first editorial profile. Verify current interface languages and source-language coverage; multilingual input does not guarantee equal analytical quality.
Limits
Strengths, caveats, and risk
Fast, scriptable outputs fit a documented discovery pipeline.
Coverage depends on configured providers, API keys, quotas and source freshness.
An enumerated subdomain may be stale, unrelated to current ownership or affected by wildcard DNS.
An enumerated subdomain may be stale, unrelated to current ownership or affected by wildcard DNS.
Keep work within authorized scope; no credential use, exploitation or intrusive probing without explicit permission.
Dated infrastructure observations do not establish ownership, compromise or attribution. Official-source desk research only; not hands-on tested. Tool-specific caution: An enumerated subdomain may be stale, unrelated to current ownership or affected by wildcard DNS.
Maintenance
Source status & suggest an update
Help keep this profile accurate. Update requests are reviewed and logged before publication.
Source checked: 2026-09-19
If something is outdated, please submit a correction or ownership update request. Claim requests are reviewed and do not grant editorial control.
Commercial or sponsorship requests use the separate partner workflow.