HTTP response header

Header usage statistics

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

Websites using header X-W4U-Upstream 7,742
Percentage of websites that use X-W4U-Upstream header <0.1%
Total discovered header values 40
Header uses directives No
Header values are unique or random No
Most popular in the country Czech Republic

Distribution by websites popularity

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

Top 10k sites 0 websites
Top 100k sites 0 websites
Top 1m sites 44 websites

Websites utilizing X-W4U-Upstream

List of websites that use X-W4U-Upstream header

Domain Country Rank Contacts
epastorek.cz Czech Republic 209,843
www.epastorek.cz Czech Republic 209,843
koubovi.cz Czech Republic 238,435
q2.cz Czech Republic 315,583
www.q2.cz Czech Republic 315,583
celostnimedicina.cz Czech Republic 328,341
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 X-W4U-Upstream header values

Header value Value prevalence
data40_php74 20.68%
parking 8.47%
data31_php56 7.54%
data29_php53 6.33%
data35_php71 6.23%
data37_php73 5.92%
data39_php73 5.32%
data30_php72 4.37%
data34_php56 4.18%
data33_php56 3.90%
data27_php4 3.64%
data28_php52 3.64%
data27_php52 3.32%
data32_php74 3.02%
data38_php73 2.92%
data28_php53 2.91%
data26_php52 1.90%
data26_php53 1.67%
data36_php70 1.38%
data29_php52 1.24%