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 Via 718,801
Percentage of websites that use Via header 6.70%
Total discovered header values 17,577
Header uses directives No
Header values are unique or random No
Most popular in the country United States of America

Connected technologies

Technologies that utilize the header

Varnish, category Cache Tools, total 464,156 websites
Google Cloud, category Content Delivery Networks, total 463,458 websites
Amazon Cloudfront, category Content Delivery Networks, total 122,564 websites
Fastly, category Content Delivery Networks, total 78,040 websites
Vegur, category Reverse Proxy, total 28,387 websites
Citrix ADC, category Network Devices, total 1,926 websites
ALProxy, category Reverse Proxy, total 1,633 websites
Ipswitch-IMail, category Web Mail, total 5 websites
Cisco ACE, category Network Devices, total 1 websites

Distribution by websites popularity

Via detection in the top websites by popularity

Top 10k sites 2,444 websites
Top 100k sites 11,263 websites
Top 1m sites 77,388 websites

Websites utilizing Via

List of websites that use Via header

Domain Country Rank Contacts United States of America 25 United States of America 26 United States of America 34 United States of America 35 United States of America 35 United States of America 42
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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 value Value prevalence
1.1 varnish 27.25%
1.1 google 15.63%
1.1 varnish (Varnish/6.0) 9.00%
1.1 varnish, 1.1 varnish 6.89%
1.1 varnish (Varnish/6.5) 4.65%
1.1 vegur 3.95%
1.1 varnish-v4 3.21%
1.1 varnish (Varnish/5.1) 2.06%
varnish 1.85%
1.1 varnish (Varnish/5.2) 0.82%
1.1 varnish (Varnish/6.3), 1.1 varnish (Varnish/6.3) 0.77%
1.1 varnish (Varnish/5.0) 0.66%
1.1 varnish (Varnish/6.1) 0.38%
1.1 alproxy 0.23%
1.1 google, 1.1 varnish 0.20%
1.1 varnish (Varnish/6.2) 0.18%
1.1 varnish (Varnish/6.4) 0.12%
1.1 0.12%
1.1 varnish (Varnish/6.3) 0.11%
1.1 varnish, 1.1 varnish, 1.1 varnish 0.11%