crt.sh Subdomain Finder - Certificate Search

Find every subdomain of a domain from public Certificate Transparency logs (crt.sh), one row per host: days until certificate expiry, issuer, environment inferred from the name (staging, dev, production) and first-seen date. Asset inventory, no API key.

Publisher description, verbatim

Last 7 dayson this actor

1new actor
3other changes

Each one reaches followers by email the morning after.Follow this actor

Key figures7 readings

Price / 1k$3.00per 1,000 host-discovered

Users / 30d0→ 0 over 7 readings

Users, all time1→ 0 over 7 readings

Runs / 30d0not enough history for a trend

Runs / user / mo—runs per monthly user

Recorded changes

2026-09-20contentREADME updated+1,579 characters+1,579characters
2026-09-20changeTitle changed—on record
2026-09-20contentDescription changed—on record

showing 3 of 4 in the last 30 days · followers get all 4 by email

History

7 readings since 2026-09-19

Users / 30d7 readings

Users, all time7 readings

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Numbers on this page are measured only by an independent census of the Apify Store — not self-reported. Not indexed: too little has happened to this actor for us to have anything worth saying yet.