HTTP response header

Via header informs the client of proxies through which the response was sent

Header usage statistics

Via response header information and usage statistics.

Websites using header Via4,937,551
Percentage of websites that use Via header4.96%
Total discovered header valuesMore than 10,000
Header uses directivesNo
Header values are unique or randomNo
Most popular in the country US

Via Directives

Via directives value information and usage statistics

DirectiveShareWebsites countUnique Values

Connected technologies

Technologies that utilize the header

Google Cloud, category Content Delivery Networks, total 4,895,907 websites
Varnish, category Cache Tools, total 1,668,450 websites
Amazon Cloudfront, category Content Delivery Networks, total 673,596 websites
Fastly, category Content Delivery Networks, total 419,657 websites
ATS, category Web Servers, total 144,160 websites
Vegur, category Reverse Proxy, total 127,217 websites
ALProxy, category Reverse Proxy, total 19,155 websites
Citrix ADC, category Security Solutions, total 5,829 websites
Ipswitch-IMail, category Web Mail, total 46 websites
Cisco ACE, category Load Balancer, total 10 websites

Distribution by websites popularity

Via detection in the top websites by popularity

Top 10k sites2,434 websites
Top 100k sites19,045 websites
Top 1m sites120,728 websites

Websites utilizing Via

List of websites that use Via header

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Geographical Distribution

Header usage distribution by websites across the globe.

Common header values

List of top common Via header values

Header valueValue prevalence
1.1 google46.45%
1.1 varnish (Varnish/7.1)11.60%
1.1 varnish7.56%
1.1 varnish, 1.1 varnish3.21%
1.1 vegur2.57%
1.1 varnish-v41.24%
1.1 varnish (Varnish/6.4)1.12%
1.1 varnish (Varnish/5.2)0.75%
1.1 varnish (Varnish/6.1)0.68%
1.1 varnish (Varnish/6.3), 1.1 varnish (Varnish/6.3)0.63%
1.1 catalogs.tradeindia.com0.62%
1.1 varnish (Varnish/6.5)0.61%
1.1 varnish (Varnish/6.0)0.56%
1.1 varnish (Varnish/6.2)0.55%
1.1 alproxy0.38%
1.1 varnish (Varnish/5.1)0.31%
1.1 mysimplestore.com0.27%
1.1 varnish (Varnish/7.0)0.26%
1.1 varnish (Varnish/5.0)0.25%