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 Via4,386,777
Percentage of websites that use Via header7.45%
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 2,971,050 websites
Google Cloud CDN, category Content Delivery Networks, total 1,977,411 websites
Caddy, category Web Servers, total 968,040 websites
Envoy Proxy, category Reverse Proxy, total 828,525 websites
Amazon Cloudfront, category Content Delivery Networks, total 692,512 websites
Fastly, category Content Delivery Networks, total 269,974 websites
ATS, category Web Servers, total 46,239 websites
GoDaddy Online Store, category Ecommerce, total 11,101 websites
Fly.io, category Web Hosting, total 8,956 websites
Acquia Cloud Platform CDN, category Content Delivery Networks, total 281 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 google45%
0.0 Caddy11%
1.1 varnish6%
1.1 webcache2 (Varnish/trunk)4%
1.1 webcache1 (Varnish/trunk)3%
1.1 Caddy2%
1.1 heroku-router1%
1.1 varnish, 1.1 varnish0%
1.1 varnish (Varnish/6.0)0%
1.1 varnish-v40%
1.1 varnish (Varnish/6.3), 1.1 varnish (Varnish/6.3)0%
1.1 varnish (Varnish/7.0)0%
1.1 google, 1.1 google0%
1.1 varnish (Varnish/7.1)0%
varnish0%
1.1 varnish (Varnish/5.2)0%
1.1 mysimplestore.com0%
zorg0%
1.1 alproxy0%
1.1 varnish (Varnish/6.2)0%