via

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 via4,361,928
Percentage of websites that use via header5.40%
Total discovered header valuesMore than 10,000
Header uses directivesNo
Header values are unique or randomNo
Most popular in the country United States

via Directives

via directives value information and usage statistics
DirectiveShareWebsites countUnique Values

Connected technologies

Technologies that utilize the header
Google Cloud, category Infrastructure as a Service, total 4,260,090 websites
Google Cloud CDN, category Content Delivery Networks, total 2,061,034 websites
Varnish, category Cache Tools, total 1,402,679 websites
Amazon Cloudfront, category Content Delivery Networks, total 721,365 websites
Fastly, category Content Delivery Networks, total 398,503 websites
ATS, category Web Servers, total 31,447 websites
squid, category Cache Tools, total 16,155 websites
GoDaddy Online Store, category Ecommerce, total 12,533 websites
Fly.io, category Web Hosting, total 9,700 websites
Acquia Cloud Platform CDN, category Content Delivery Networks, total 465 websites

via header usage distribution by website rank



Geographical Distribution

Header usage distribution by websites across the globe.



Websites utilizing via

List of websites that use via header
DomainCountryRankContacts
code.jquery.com United States23
static.parastorage.com United States31
static.wixstatic.com United States33
siteassets.parastorage.com United States34
player.vimeo.com United States51
w3c.github.io United States56
See full domain list

Common header values

List of top common via header values
Header valueValue prevalence
1.1 google47.24%
1.1 varnish6.46%
1.1 webcache2 (Varnish/trunk)5.81%
1.1 webcache1 (Varnish/trunk)5.33%
1.1 vegur1.77%
1.1 varnish (Varnish/5.0)1.74%
1.1 varnish, 1.1 varnish1.45%
1.1 varnish (Varnish/6.4)1.37%
1.1 varnish-v40.88%
1.1 varnish (Varnish/6.0)0.76%
1.1 varnish (Varnish/6.1)0.70%
varnish0.56%
1.1 varnish (Varnish/6.3), 1.1 varnish (Varnish/6.3)0.54%
1.1 varnish (Varnish/5.2)0.54%
1.1 varnish (Varnish/6.5)0.52%
1.1 varnish (Varnish/6.2)0.45%
1.1 alproxy0.38%
1.1 varnish (Varnish/6.6)0.32%
1.1 catalogs.tradeindia.com0.31%
1.1 mysimplestore.com0.29%