Enter a target
Accepted input: Domain.
fleet module
subfinder OSINT search
Fast passive subdomain discovery from many public sources. Results land in a Command One case with their source and confidence, alongside the rest of your investigation. Part of Subdomain finder · all tools.
public sources only · free registration
how it works
From domain to evidence
Run the module
The job is sent to a live worker. If no worker can run it, you are not charged.
Review results
Subdomains for the domain.
Verify and export
Link findings in CommandDeck, add notes and export a PDF or CSV case report.
related modules
Pair subfinder with
Combining modules gives independent sources that confirm or rule out a lead.
Domain Recon
Quick passive look at a domain's DNS, mail setup and certificate surface.
theHarvester
Gathers emails, hostnames and subdomains for a domain from public sources.
Sublist3r
Passive subdomain enumeration using search engines and public datasets.
OWASP Amass
Maps a domain's attack surface by discovering subdomains and related infrastructure.
recon-ng
Modular reconnaissance framework that gathers hosts and contacts for a domain.
bbot
Recursive attack-surface scanner that keeps expanding from each new discovery.
questions
subfinder questions
What does subfinder find?
Subdomains for the domain.
What do I need to start a subfinder search?
Domain. Command One only runs a module against targets it accepts.
What are the limits of subfinder?
Passive only; some subdomains may no longer resolve.
How much does subfinder cost?
Registration is free. The module uses credits from your daily allowance or purchased balance. Current costs are listed on the credits page, and you are only charged when the module can actually run.
Try subfinder in a case
Create a free account to run available modules. For lawful research and authorised assessments only.