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 689,688
Percentage of websites that use Via header 6.04%
Total discovered header values 16,895
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 457,222 websites
Amazon Cloudfront, category Content Delivery Networks, total 110,412 websites
Google Cloud, category Content Delivery Networks, total 100,374 websites
Fastly, category Content Delivery Networks, total 70,617 websites
Heroku, category Platform as a Service, total 30,018 websites
Vegur, category Reverse Proxy, total 28,922 websites
ALProxy, category Reverse Proxy, total 1,695 websites
Citrix ADC, category Network Devices, total 1,674 websites
Cisco ACE, category Network Devices, total 1 websites

Distribution by websites popularity

Via detection in the top websites by popularity

Top 10k sites 2,361 websites
Top 100k sites 10,899 websites
Top 1m sites 74,819 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 796,892 United States of America 8,574,950
See full domain list

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 34.80%
1.1 google 14.28%
1.1 varnish (Varnish/6.0) 9.20%
1.1 varnish-v4 4.74%
1.1 vegur 4.19%
1.1 varnish (Varnish/6.5) 4.06%
1.1 varnish (Varnish/5.1) 2.13%
varnish 1.95%
1.1 varnish (Varnish/5.0) 0.89%
1.1 varnish (Varnish/5.2) 0.87%
1.1 varnish (Varnish/6.3), 1.1 varnish (Varnish/6.3) 0.81%
1.1 varnish (Varnish/6.4) 0.80%
1.1 varnish (Varnish/6.1) 0.35%
1.1 alproxy 0.25%
1.1 shluota (squid) 0.17%
1.1 varnish (Varnish/6.2) 0.12%
1.1 varnish (Varnish/6.3) 0.11%
1.1 0.10%
1.1 stark 0.09%
1.1 varnish, 1.1 google 0.09%