HTTP response header

X-CDN is an HTTP header which is the name describing the CDN being used. Example values are Incapsula fastly cloudfront and level3. It is simply informational

Header usage statistics

X-CDN response header information and usage statistics.

Websites using header X-CDN 27,502
Percentage of websites that use X-CDN header 0.26%
Total discovered header values 51
Header uses directives No
Header values are unique or random No
Most popular in the country United States of America

X-CDN Often Used Together:

Connected technologies

Technologies that utilize the header

Akamai, category Content Delivery Networks, total 117,868 websites
Fastly, category Content Delivery Networks, total 78,040 websites
Incapsula, category Content Delivery Networks, total 27,609 websites
ZenEdge, category Content Delivery Networks, total 3,614 websites

Distribution by websites popularity

X-CDN detection in the top websites by popularity

Top 10k sites 217 websites
Top 100k sites 639 websites
Top 1m sites 5,211 websites

Websites utilizing X-CDN

List of websites that use X-CDN header

Domain Country Rank Contacts
www.pinterest.com United States of America 13
s-media-cache-ak0.pinimg.com United States of America 150
www.pinterest.ca United States of America 259
www.pinterest.co.uk United States of America 349
ico.org.uk United States of America 425
www.bizjournals.com United States of America 458
See full domain list
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Geographical Distribution

Header usage distribution by websites across the globe.

Common header values

List of top common X-CDN header values

Header value Value prevalence
Imperva 84.83%
Served-By-Zenedge 12.42%
Incapsula 1.20%
fastly 0.28%
akamai 0.23%
nyc-anycast 0.16%
1 0.14%
WCWS Internet Inc 0.11%
XLabs Security 0.08%
Served-By-Akamai 0.07%
edgecast 0.07%
AKAM 0.06%
CPD 0.05%
ak 0.03%
5centsCDN 0.03%
ECST 0.03%
Served by myself 0.02%
highwinds 0.02%
Enabled 0.01%
p-cache 0.01%