CF-RAY

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 909,415
Percentage of websites that use CF-RAY header 7.80%
Total discovered header values 909,403
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 910,090 websites

Distribution by websites popularity

CF-RAY detection in the top websites by popularity

Top 10k sites 2,561 websites
Top 100k sites 14,663 websites
Top 1m sites 121,013 websites

Websites utilizing CF-RAY

List of websites that use CF-RAY header

Domain Country Rank Contacts
cdnjs.cloudflare.com United States of America 33
creativecommons.org United States of America 34
medium.com United States of America 37
tinyurl.com United States of America 69
about.me United States of America 94
www.researchgate.net United States of America 129
See full domain list

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
- 0.00%
607852a0cc4c0353-ORD 0.00%
605c083ce8053b34-SJC 0.00%
605550cebc3a39a2-SEA 0.00%
d13b3671cfa213d29caa52a2a69f0da3 0.00%
606014e0497142c3-LAX 0.00%
604751c21a3b35da-LAX 0.00%
604013bcfceced1b-SJC 0.00%
5f6bc1edb980029d-SEA 0.00%
3b1412753f475cc969c37231dd6eaea2 0.00%
4445414442454546-LED 0.00%
4fe9c4aea8d5ced8-IAD 0.00%
50433176194ad89e79418efd1478446a 0.00%
5813b2db0bdbf1a6-ATL 0.00%
589d3b43886ddd8f-SIN 0.00%
5a1e50e6e88904c8-LAX 0.00%
5a1e59914bd8e7fd-LAX 0.00%
5a1e5d1cbb76eb49-LAX 0.00%
5a1e5d2bcf79987b-LAX 0.00%
5a1e89458828d392-LAX 0.00%