HTTP response header

The CF-RAY response header is a unique ID from CloudFlare and indicates that the resource was served through CloudFlare. The CF-Cache-Status response header indicates specifically if the file was from the cache or not. If the value of CF-Cache-Status is HIT then that resource was served from CloudFlare's cache

Header usage statistics

CF-RAY response header information and usage statistics.

Websites using header CF-RAY 3,531,106
Percentage of websites that use CF-RAY header 6.58%
Total discovered header values 3,531,025
Header uses directives No
Header values are unique or random Yes
Most popular in the country United States of America

Connected technologies

Technologies that utilize the header

CloudFlare, category Content Delivery Networks, total 3,535,854 websites

Distribution by websites popularity

CF-RAY detection in the top websites by popularity

Top 10k sites 2,625 websites
Top 100k sites 14,905 websites
Top 1m sites 124,402 websites

Websites utilizing CF-RAY

List of websites that use CF-RAY header

Domain Country Rank Contacts United States of America 33 United States of America 34 United States of America 37 United States of America 69 United States of America 77 United States of America 94
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 CF-RAY header values

Header value Value prevalence
d13b3671cfa213d29caa52a2a69f0da3 0.00%
3b1412753f475cc969c37231dd6eaea2 0.00%
5698f562cccbed7f-SJC 0.00%
5319dfdccb34adec-SMF 0.00%
589d3b43886ddd8f-SIN 0.00%
65861ad76bad3660-LAX 0.00%
6116cb15ba3a212d-SJC 0.00%
658f67fb6eb7991d-LAX 0.00%
- 0.00%
33ebf82af47b5078-LAX 0.00%
65adab4d68a3e80d-LAX 0.00%
4912eddd826daf11-KIX 0.00%
65a5c9715a161821-EWR 0.00%
65ac8a19aee56d70-SJC 0.00%
659ffb7a1c69f780-DEN 0.00%
658d80d1395bed33-SJC 0.00%
658bb1539983211b-SJC 0.00%
658081563f790d50-LAX 0.00%
6594bb6a5e1d2f01-DFW 0.00%
655d844a0aec42a4-LAX 0.00%