Expect-CT Directives (3 total)
- enforce
- max-age
- report-uri
The Expect-CT header allows sites to opt in to reporting and/or enforcement of Certificate Transparency requirements which prevents the use of misissued certificates for that site from going unnoticed
Websites using header Expect-CT | 870,830 |
Percentage of websites that use Expect-CT header | 7.47% |
Total discovered header values | 2,387 |
Header uses directives | Yes |
Header values are unique or random | No |
Most popular in the country | ![]() |
Directive | Share | Websites count | Unique Values |
---|---|---|---|
max-age | 79.98% | 696,448 | 90 |
report-uri | 79.01% | 688,002 | 1,357 |
enforce | 0.82% | 7,121 | 51 |
|
Top 10k sites | 2,581 websites |
Top 100k sites | 14,559 websites |
Top 1m sites | 118,007 websites |
Domain | Country | Rank | Contacts |
---|---|---|---|
|
![]() |
23 | |
|
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33 | |
|
![]() |
34 | |
|
![]() |
37 | |
|
![]() |
69 | |
|
![]() |
94 |
Header value | Value prevalence |
---|---|
max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct" | 97.62% |
max-age=31536000, report-uri="http://csp.yahoo.com/beacon/csp?src=yahoocom-expect-ct-report-only" | 0.31% |
max-age=0 | 0.20% |
max-age=7776000, enforce | 0.19% |
max-age=86400 | 0.16% |
max-age=0, report-uri="/report-expect-ct-violation" | 0.13% |
max-age=300, report-uri="https://report.enjin.com/expect-ct" | 0.10% |
enforce, max-age=21600 | 0.08% |
report-uri="https://web-security-reports.services.atlassian.com/expect-ct-report/global-proxy", enforce, max-age=86400 | 0.08% |
max-age=31536000 | 0.07% |
max-age=86400, enforce | 0.05% |
max-age=31536000, enforce | 0.04% |
enforce, max-age=30 | 0.04% |
enforce, max-age=86400, report-uri="https://hpage-report.uriports.com/reports/enforce" | 0.03% |
enforce; max-age=2592000; | 0.03% |
enforce, max-age=31536000 | 0.02% |
enforce, max-age=300 | 0.02% |
enforce, max-age=86400 | 0.02% |
enforce, max-age=3600 | 0.02% |
enforce,max-age=86400 | 0.02% |