Keep-Alive

HTTP response header

Header usage statistics

Keep-Alive response header information and usage statistics.

Websites using header Keep-Alive 2,882,275
Percentage of websites that use Keep-Alive header 26.52%
Total discovered header values 3,462
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 81.66% 2,353,715 164
max 64.83% 1,868,459 939

Distribution by websites popularity

Keep-Alive detection in the top websites by popularity

Top 10k sites 1,984 websites
Top 100k sites 26,355 websites
Top 1m sites 339,621 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.ncbi.nlm.nih.gov United States of America 72
www.bbc.co.uk United Kingdom 108
usatoday.com United States of America 123
paypal.me United States of America 140
See full domain list
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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 39.98%
timeout=5, max=75 7.11%
timeout=2, max=100 7.06%
timeout=15 6.45%
timeout=5 5.25%
timeout=20 4.87%
timeout=15, max=100 4.23%
timeout=3, max=100 3.08%
timeout=2, max=1000 1.75%
timeout=30 1.32%
timeout=60 1.20%
timeout=10 0.91%
timeout=1, max=100 0.90%
timeout=5, max=500 0.90%
timeout=3, max=500 0.85%
timeout=2, max=500 0.67%
timeout=10, max=100 0.67%
timeout=5, max=200 0.61%
timeout=5, max=150 0.39%
timeout=10, max=75 0.29%