Certificate Transparency
by the numbers.
A live snapshot of the public CT corpus indexed by CT Radar. Sourced directly from public Certificate Transparency log operators — canonical, not crowdsourced.
Records indexed
3,904,991,636
3.90B
Certificate authorities
1,309
distinct issuers
Domains observed
3.90B
across SANs / CN
Snapshot freshness
3h ago
updated daily
New certificates per month
Issuance volume from CT logs, last 24 months. Each bar counts certificates whose notBefore falls in that month.
Top certificate authorities
Issuers ranked by number of certificates in our index. Long names truncated for readability.