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 | 891,743 |
Percentage of websites that use Expect-CT header | 8.20% |
Total discovered header values | 2,129 |
Header uses directives | Yes |
Header values are unique or random | No |
Most popular in the country | ![]() |
Directive | Share | Websites count | Unique Values |
---|---|---|---|
max-age | 81.31% | 725,047 | 101 |
report-uri | 80.07% | 714,042 | 1,418 |
enforce | 1.02% | 9,136 | 52 |
|
Top 10k sites | 2,674 websites |
Top 100k sites | 14,953 websites |
Top 1m sites | 121,935 websites |
Domain | Country | Rank | Contacts |
---|---|---|---|
|
![]() |
9 | |
|
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23 | |
|
![]() |
33 | |
|
![]() |
34 | |
|
![]() |
37 | |
|
![]() |
67 |
Header value | Value prevalence |
---|---|
max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct" | 97.36% |
max-age=7776000, enforce | 0.42% |
max-age=31536000, report-uri="http://csp.yahoo.com/beacon/csp?src=yahoocom-expect-ct-report-only" | 0.30% |
max-age=0 | 0.23% |
max-age=86400 | 0.18% |
max-age=0, report-uri="/report-expect-ct-violation" | 0.12% |
enforce, max-age=21600 | 0.09% |
max-age=300, report-uri="https://report.enjin.com/expect-ct" | 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=300 | 0.03% |
enforce; max-age=2592000; | 0.03% |
enforce, max-age=86400 | 0.02% |
enforce, max-age=31536000 | 0.02% |
enforce, max-age=86400, report-uri="https://hpage-report.uriports.com/reports/enforce" | 0.02% |
enforce, max-age=3600 | 0.02% |
enforce,max-age=86400 | 0.02% |