Keep-Alive

HTTP response header

Header usage statistics

Keep-Alive response header information and usage statistics.

Websites using header Keep-Alive 16,532,916
Percentage of websites that use Keep-Alive header 30.83%
Total discovered header values 4,557
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 36.58% 6,047,984 119
max 29.13% 4,815,941 627

Distribution by websites popularity

Keep-Alive detection in the top websites by popularity

Top 10k sites 1,934 websites
Top 100k sites 25,971 websites
Top 1m sites 330,869 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
npr.org United States of America 148
arxiv.org United States of America 166
www.un.org United States of America 192
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 39.35%
timeout=15 9.10%
timeout=2, max=100 7.23%
timeout=5, max=75 6.07%
timeout=5 5.02%
timeout=3, max=100 4.61%
timeout=15, max=100 4.05%
timeout=20 2.79%
timeout=2, max=1000 2.51%
timeout=30 1.35%
timeout=60 1.15%
timeout=1, max=100 1.05%
timeout=10 0.87%
timeout=10, max=100 0.77%
timeout=3, max=500 0.71%
timeout=5, max=500 0.64%
timeout=5, max=200 0.63%
timeout=2, max=500 0.56%
timeout=10, max=75 0.50%
timeout=5, max=150 0.48%