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 Via3,798,502
Percentage of websites that use Via header6.20%
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 Platform, category Platform as a Service, total 3,089,817 websites
Google Cloud CDN, category Content Delivery Networks, total 1,805,492 websites
Varnish, category Cache Tools, total 1,055,100 websites
Amazon Cloudfront, category Content Delivery Networks, total 607,896 websites
Fastly, category Content Delivery Networks, total 329,509 websites
ATS, category Web Servers, total 44,443 websites
GoDaddy Online Store, category Ecommerce, total 11,969 websites
Squid, category Cache Tools, total 11,254 websites
Fly.io, category Web Hosting, total 8,877 websites
Acquia Cloud Platform CDN, category Content Delivery Networks, total 309 websites

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 google47.51%
1.1 varnish6.50%
0.0 Caddy3.76%
1.1 webcache2 (Varnish/trunk)3.68%
1.1 webcache1 (Varnish/trunk)3.05%
1.1 Caddy1.81%
1.1 webcache2 (Varnish/7.7)1.71%
1.1 webcache1 (Varnish/7.7)1.52%
1.1 vegur1.28%
1.1 varnish, 1.1 varnish1.23%
1.1 varnish (Varnish/6.0)0.72%
1.1 varnish-v40.62%
1.1 varnish (Varnish/7.0)0.59%
1.1 varnish (Varnish/7.1)0.50%
varnish0.43%
1.1 varnish (Varnish/6.3), 1.1 varnish (Varnish/6.3)0.42%
1.1 google, 1.1 google0.41%
1.1 varnish (Varnish/5.2)0.39%
1.1 varnish (Varnish/6.2)0.32%
1.1 mysimplestore.com0.32%