Keep-Alive

HTTP response header

Header usage statistics

Keep-Alive response header information and usage statistics.

Websites using header Keep-Alive 2,950,874
Percentage of websites that use Keep-Alive header 25.32%
Total discovered header values 3,451
Header uses directives Yes
Header values are unique or random No
Most popular in the country United States of America

Keep-Alive Directives (2 total)

  • max
  • timeout

Keep-Alive Directives

Keep-Alive directives value information and usage statistics

Directive Share Websites count Unique Values
timeout 80.00% 2,360,576 160
max 63.36% 1,869,615 959

Distribution by websites popularity

Keep-Alive detection in the top websites by popularity

Top 10k sites 2,083 websites
Top 100k sites 26,973 websites
Top 1m sites 343,110 websites

Websites utilizing Keep-Alive

List of websites that use Keep-Alive header

Domain Country Rank Contacts
gmpg.org Canada 11
ncbi.nlm.nih.gov United States of America 72
www.bbc.co.uk United Kingdom 108
usatoday.com United States of America 123
npr.org United States of America 148
arxiv.org United States of America 166
See full domain list

Geographical Distribution

Header usage distribution by websites across the globe.






Common header values

List of top common Keep-Alive header values

Header value Value prevalence
timeout=5, max=100 39.32%
timeout=2, max=100 7.06%
timeout=5, max=75 6.50%
timeout=15 6.36%
timeout=5 5.62%
timeout=20 4.79%
timeout=15, max=100 4.26%
timeout=3, max=100 3.05%
timeout=2, max=1000 1.67%
timeout=30 1.28%
timeout=60 1.22%
timeout=10 0.91%
timeout=5, max=500 0.88%
timeout=3, max=500 0.85%
timeout=1, max=100 0.85%
timeout=10, max=100 0.65%
timeout=2, max=500 0.63%
timeout=5, max=200 0.59%
timeout=5, max=150 0.38%
timeout=10, max=75 0.32%