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
15 Sept 2026, 11:41 UTC

CT log entries today

126,406,255+2,281,984 vs same time yesterdaySince 00:00 UTC

CT log entries this month

3,452,681,759+596,804,207 vs same point last monthCalendar month: September 2026

Estimated unique certificates

1,183,233,337+19,302,387 vs same time yesterdaySince counters were reset

Estimated DNS names

1,180,458,362+16,545,366 vs same time yesterdaySince counters were reset

Estimated registrable domains

292,700,454+2,760,826 vs same time yesterdaySince counters were reset

Certificate–domain pairs

1,235,066,126+19,862,165 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	11,410,477
01:00	10,554,091
02:00	10,324,763
03:00	10,891,505
04:00	10,233,227
05:00	9,539,827
06:00	10,059,268
07:00	11,139,340
08:00	11,524,511
09:00	10,914,099
10:00	11,209,457
11:00	8,605,690

Daily entries

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

View chart data

Period	CT log entries
17 Aug	202,935,523
18 Aug	199,640,728
19 Aug	207,983,487
20 Aug	276,009,427
21 Aug	263,063,280
22 Aug	268,464,578
23 Aug	278,974,025
24 Aug	281,384,364
25 Aug	253,431,223
26 Aug	228,149,313
27 Aug	228,176,899
28 Aug	247,530,593
29 Aug	226,074,775
30 Aug	201,762,985
31 Aug	219,987,261
1 Sept	228,397,973
2 Sept	225,005,493
3 Sept	227,812,446
4 Sept	220,504,138
5 Sept	205,731,626
6 Sept	213,414,434
7 Sept	252,033,114
8 Sept	251,265,274
9 Sept	268,177,214
10 Sept	271,705,129
11 Sept	251,640,157
12 Sept	221,416,878
13 Sept	229,823,520
14 Sept	252,275,460
15 Sept	126,406,255

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	6,745,240,955
Sept 26	3,452,681,759

New certificates and domains observed each day

Estimated distinct additions to the cumulative counts for completed UTC days. The first day needs a prior baseline and is omitted.

View chart data

Period	Certificates	Registrable domains
18 Aug	20,528,541	4,719,023
19 Aug	21,451,174	4,552,567
20 Aug	28,420,121	5,778,338
21 Aug	28,045,168	5,258,338
22 Aug	27,667,349	5,208,954
23 Aug	26,077,386	5,030,993
24 Aug	26,819,683	4,879,808
25 Aug	26,565,407	5,005,259
26 Aug	24,635,558	4,315,657
27 Aug	23,455,862	4,428,346
28 Aug	26,354,846	4,200,939
29 Aug	23,461,764	4,310,076
30 Aug	17,437,981	3,372,150
31 Aug	18,787,902	3,594,740
1 Sept	19,348,350	3,757,027
2 Sept	19,880,853	4,157,880
3 Sept	19,482,582	3,336,441
4 Sept	19,199,229	3,255,479
5 Sept	17,758,506	3,195,549
6 Sept	18,022,794	3,353,652
7 Sept	18,515,100	3,053,523
8 Sept	18,808,656	3,278,866
9 Sept	20,641,198	3,159,807
10 Sept	20,137,650	2,829,265
11 Sept	19,288,918	2,463,872
12 Sept	16,381,506	2,385,159
13 Sept	18,171,110	2,466,078
14 Sept	19,969,865	2,699,351

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