X-W4U-Upstream

HTTP response header

Header usage statistics

X-W4U-Upstream response header information and usage statistics.

Websites using header X-W4U-Upstream7,879
Percentage of websites that use X-W4U-Upstream header<0.1%
Total discovered header values55
Header uses directivesNo
Header values are unique or randomNo
Most popular in the country CZ

X-W4U-Upstream Directives

X-W4U-Upstream directives value information and usage statistics

DirectiveShareWebsites countUnique Values

Distribution by websites popularity

X-W4U-Upstream detection in the top websites by popularity

Top 10k sites0 websites
Top 100k sites0 websites
Top 1m sites45 websites

Websites utilizing X-W4U-Upstream

List of websites that use X-W4U-Upstream header

DomainCountryRankContacts
epastorek.cz CZ209,843
www.epastorek.cz CZ209,843
koubovi.cz CZ238,435
q2.cz CZ315,583
www.q2.cz CZ315,583
celostnimedicina.cz CZ328,341
See full domain list
Flat price per the report, subscription is not required.

Geographical Distribution

Header usage distribution by websites across the globe.






Common header values

List of top common X-W4U-Upstream header values

Header valueValue prevalence
data40_php7414.87%
parking8.96%
data30_php566.98%
data29_php535.91%
data38_php744.77%
data37_php733.83%
data27_php43.53%
data28_php523.39%
data36_php733.30%
data27_php523.13%
data39_php733.07%
data34_php712.88%
data32_php742.80%
data28_php532.74%
data35_php712.72%
data32_php562.59%
data31_php562.54%
data39_php741.80%
data35_php731.68%
data41_php741.64%