projectdiscovery/subfinder
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Fast passive subdomain enumeration tool.
5 mentions on Hacker News by 4 people: 2 stories, 3 comments · first 2023-09-16 · latest 2026-02-05
20082026
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…leave traces from dns queries. Subfinder has a lot of sources to find subdomains, not only certs: https://github.com/projectdiscovery/subfinder
comment by andix · 2026-02-05 · in When internal hostnames are leaked to the clown -
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Show HN: ProjectDiscoverys Subfinder > Android App in <30M – Claude Codestory by alpenbazi · 2025-10-15 · 1 comment
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I'm surprised nobody mentioned subfinder yet: https://github.com/projectdiscovery/subfinder Subfinder uses different public and private sources to discover subdomains. Certificate Transparency logs are a great source, but it also has some…
comment by andix · 2025-03-07 · in Ask HN: How did the internet discover my subdomain? -
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Subfinder: Passive subdomain enumeration toolstory by leonry · 2025-01-17 · 2 comments
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https://github.com/projectdiscovery/subfinder does this, but it explains all the methods and lets you choose to only do a passive scan.
comment by asmor · 2023-09-16 · in Subdomain.center – discover all subdomains for a domain