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webapp.test.postbox.gcp.uis.cam.ac.uk

Every SSL/TLS certificate ever issued for this name, indexed from public CT logs.

csv export pro
total records
7
active · on this page
0
expired · on this page
7
unique issuers · on this page
5
issuers on this pageZeroSSL2Microsoft2Unknown Issuer1Let's Encrypt1Entrust1
domainstatus
webapp.test.postbox.gcp.uis.cam.ac.ukcrt.sh
ZeroSSL
expired 11mo ago
webapp.test.postbox.gcp.uis.cam.ac.ukcrt.sh
ZeroSSL
expired 11mo ago
webapp.test.postbox.gcp.uis.cam.ac.ukcrt.sh
Microsoft
expired 1y ago
webapp.test.postbox.gcp.uis.cam.ac.ukcrt.sh
Microsoft
expired 1y ago
webapp.test.postbox.gcp.uis.cam.ac.ukcrt.sh
Unknown Issuer
expired 1y ago
webapp.test.postbox.gcp.uis.cam.ac.ukcrt.sh
Let's Encrypt
expired 3mo ago
webapp.test.postbox.gcp.uis.cam.ac.ukcrt.sh
Entrust
expired 2mo ago
Pipe results into your recon pipeline
# Python
$ pip install ct-radar
$ ct-radar webapp.test.postbox.gcp.uis.cam.ac.uk | httpx -silent
# Go
$ go install github.com/imfht/ct-radar-cli/cli@latest
$ ct-radar webapp.test.postbox.gcp.uis.cam.ac.uk | nuclei
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About certificate history for webapp.test.postbox.gcp.uis.cam.ac.uk

This page lists every X.509 (SSL/TLS) certificate ever issued for webapp.test.postbox.gcp.uis.cam.ac.uk and its subdomains, as recorded in public Certificate Transparency (CT) logs. CT logs are an immutable, append-only record of every certificate issued by participating Certificate Authorities (CAs), as required by the major browsers since 2018.

Subdomain enumeration via CT logs is one of the highest-signal techniques in reconnaissance — every time a TLS certificate is issued, all Subject Alternative Names (SANs) on that certificate become public. Internal and forgotten subdomains regularly show up here days after they're set up.

To monitor webapp.test.postbox.gcp.uis.cam.ac.uk for newly-issued certificates in real-time (useful for detecting unauthorized issuance, phishing variants, or shadow IT) add it to your watchlist (Pro plan).