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crt.name

crt.name
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Category
Cybersecurity
Rank
No. 2069Tools index
Pricing
Free
Type
TOOL
Builder
@cryptoshan484
Date

About

A passive subdomain index built from certificate transparency logs. Send an apex domain and it returns every subdomain on file with the date each name first appeared, drawing on live CT logs plus retired logs, zone files and crawl data. Free, no token, 1000 requests per IP each day.

Why it made the leaderboard

Certificate transparency is public data, and the useful part is an index fast enough to query while you work.

Tags

osintsubdomainscertificate-transparencyreconapi

Media

crt.name

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Editorially curated, with community endorsements as a secondary signal. Corrections welcome.