Strict-Transport-Security directives (3 total)
- includesubdomains
- max-age
- preload
Policy informing a client how long to cache the HTTPS policy and whether this applies to subdomains.
Websites using header Strict-Transport-Security | 16,025,918 |
Percentage of websites that use Strict-Transport-Security header | 19.83% |
Total discovered header values | 6,257 |
Header uses directives | Yes |
Header values are unique or random | No |
Most popular in the country | United States |
Directive | Share | Websites count | Unique Values |
---|---|---|---|
max-age | 99.90% | 16,010,001 | 472 |
includesubdomains | 25.79% | 4,133,527 | 325 |
preload | 14.50% | 2,323,163 | 225 |
Domain | Country | Rank | Contacts |
---|---|---|---|
facebook.com | United States | 2 | |
www.facebook.com | United States | 2 | |
www.google.com | United States | 3 | |
wordpress.org | United States | 4 | |
youtube.com | United States | 6 | |
www.youtube.com | United States | 6 |
Header value | Value prevalence |
---|---|
max-age=3600 | 20.68% |
max-age=31536000 | 15.30% |
max-age=0 | 9.80% |
max-age=31536000; includeSubDomains; preload | 5.20% |
max-age=31536000; includeSubDomains | 4.79% |
max-age=7889238 | 4.75% |
max-age=15552000 | 3.80% |
max-age=31536000; preload | 3.08% |
max-age=63072000 | 2.57% |
max-age=63072000; includeSubDomains | 2.49% |
max-age=15768000 | 2.42% |
max-age=63072000; includeSubdomains; preload | 2.16% |
max-age=300 | 2.13% |
max-age=31536000; | 2.08% |
max-age=604800 | 1.64% |
max-age=86400 | 1.59% |
max-age=15768000; includeSubDomains | 1.46% |
max-age=15724800; includeSubDomains | 0.87% |
max-age=16000000 | 0.79% |
max-age=2592000 | 0.72% |