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 4,042,333
Percentage of websites that use Via header 4.08%
Total discovered header values 10,001
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

Google Cloud, category Content Delivery Networks, total 3,604,674 websites
Varnish, category Cache Tools, total 1,806,722 websites
Amazon Cloudfront, category Content Delivery Networks, total 637,737 websites
Fastly, category Content Delivery Networks, total 400,779 websites
ATS, category Web Servers, total 134,571 websites
Vegur, category Reverse Proxy, total 132,867 websites
ALProxy, category Reverse Proxy, total 18,718 websites
Citrix ADC, category Security Solutions, total 6,086 websites
Ipswitch-IMail, category Web Mail, total 58 websites
Cisco ACE, category Load Balancer, total 10 websites

Distribution by websites popularity

Via detection in the top websites by popularity

Top 10k sites 2,366 websites
Top 100k sites 18,354 websites
Top 1m sites 113,064 websites

Websites utilizing Via

List of websites that use Via header

Domain Country Rank Contacts United States of America 31 United States of America 33 United States of America 34 United States of America 51 United States of America 56 United States of America 61
See full domain list
Flat price per the report, subscription is not required.

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 google 32.60%
1.1 varnish (Varnish/6.6) 14.48%
1.1 varnish 9.79%
1.1 varnish, 1.1 varnish 3.99%
1.1 vegur 3.28%
1.1 varnish (Varnish/5.0) 2.32%
1.1 varnish-v4 2.13%
1.1 varnish (Varnish/6.4) 1.38%
1.1 varnish (Varnish/5.2) 1.13%
1.1 0.98%
varnish 0.91%
1.1 varnish (Varnish/6.3), 1.1 varnish (Varnish/6.3) 0.81%
1.1 varnish (Varnish/6.0) 0.79%
1.1 varnish (Varnish/6.5) 0.59%
1.1 varnish (Varnish/6.1) 0.59%
1.1 alproxy 0.46%
1.1 varnish (Varnish/5.1) 0.38%
1.1 0.34%
1.1 varnish (Varnish/6.2) 0.32%
1.1 varnish (Varnish/6.3) 0.23%