THE PUBLIC TLS ECOSYSTEM, MEASURED

Certificate Transparency at a glance.

Name: CT Monitoring aggregate Certificate Transparency statistics
Creator: CT Monitoring
License: https://ctmonitoring.com/terms/

A continuously updated view of public Certificate Transparency logs for TLS certificates: how many entries are processed, how many certificates they represent and how widely those certificates are distributed across DNS names and domains.

View statistics How the figures work

LIVE COLLECTORS

Latest statistics

Current · updated every 15 minutes
1 Aug 2026, 09:11 UTC

CT log entries today

57,698,065−1,745,148 vs same time yesterdaySince 00:00 UTC

CT log entries this month

57,698,065Calendar month: August 2026

Estimated unique certificates

199,329,264+19,620,647 vs same time yesterdaySince counters were reset

Estimated DNS names

250,430,781+23,592,684 vs same time yesterdaySince counters were reset

Estimated registrable domains

81,209,464+6,983,040 vs same time yesterdaySince counters were reset

Certificate–domain pairs

206,823,989+20,280,592 vs same time yesterdaySince counters were reset

Figures since 22 July 2026. Entry counts are exact; unique certificate and domain totals are estimates (±0.20% expected error).

HISTORICAL VIEW

How activity is changing

Entries by hour today

UTC hourly entry volume. The current hour is partial.

View chart data

Period	CT log entries
00:00	6,929,899
01:00	5,854,791
02:00	6,210,324
03:00	5,510,880
04:00	6,458,116
05:00	5,671,161
06:00	6,849,292
07:00	5,878,498
08:00	6,462,986
09:00	1,872,118

Daily entries

The latest 30 UTC days. The current day is partial.

View chart data

Period	CT log entries
22 Jul	105,704,281
23 Jul	156,734,890
24 Jul	155,073,352
25 Jul	142,078,613
26 Jul	138,933,644
27 Jul	152,493,357
28 Jul	157,603,217
29 Jul	154,867,641
30 Jul	154,934,677
31 Jul	153,377,627
1 Aug	57,698,065

Calendar-month entries

Up to 12 completed months plus the current partial month.

View chart data

Period	CT log entries
Jul 26	1,475,591,991
Aug 26	57,698,065

Estimated certificate and domain growth

Daily snapshots of the cumulative probabilistic estimates.

View chart data

Period	Estimated certificates	Estimated registrable domains
22 Jul	14,179,883	7,168,032
23 Jul	34,484,998	16,511,747
24 Jul	53,490,931	25,229,616
25 Jul	71,707,721	33,670,411
26 Jul	89,964,378	41,636,653
27 Jul	109,802,541	49,368,279
28 Jul	130,888,064	57,116,688
29 Jul	151,878,042	64,573,559
30 Jul	172,384,097	71,494,703
31 Jul	192,044,357	78,507,683
1 Aug	199,329,264	81,209,464

WHY IT EXISTS

Public logs create accountability.

Certificate Transparency makes publicly trusted TLS certificate issuance visible. That visibility helps domain owners detect unexpected certificates, researchers understand the certificate ecosystem and certificate authorities demonstrate that issuance is auditable.

CT Monitoring turns a high-volume stream into understandable aggregate statistics. It does not publish private customer watchlists or claim that every logged certificate is unique, trusted or currently in use.

Entries processed

The raw volume accepted from the monitored public logs, including entries repeated across logs.

Estimated certificates

An approximate distinct count that reduces duplication without retaining every certificate globally.

Names and domains

Distinct DNS names and registrable domains observed in certificate name fields.

OPEN METHODOLOGY

Understand what every number means.

Read the collection scope, approximation method and limitations before using the data.

Read methodology