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-RAY7,778,180
Percentage of websites that use CF-RAY header13.22%
Total discovered header valuesMore than 10,000
Header uses directivesNo
Header values are unique or randomNo
Most popular in the country United States

CF-RAY Directives

CF-RAY directives value information and usage statistics
DirectiveShareWebsites countUnique Values

Connected technologies

Technologies that utilize the header
Cloudflare, category Content Delivery Networks, total 10,750,397 websites

Websites utilizing CF-RAY

List of websites that use CF-RAY header
DomainCountryRankContacts
twitter.com United States7
hugedomains.com United States14
linkedin.com United States19
cdnjs.cloudflare.com United States20
maxcdn.bootstrapcdn.com United States26
cloudflare.com United States27
See full domain list

Common header values

List of top common CF-RAY header values
Header valueValue prevalence
SIN0%
87a86986c8101e78-EZE0%
-0%
9b228d651d21f9f1-SJC0%
9d7211e3690a664f-AMS0%
9ccd5e171a73c95a-IAD0%
9e490d3a7a8a17d8-SJC0%
9d0349d2bc18cb5f-PDX0%
87bf8ac48f25c80b-EZE0%
87bde60a69942801-SEA0%
982e475c78e578e4-LAX0%
9ca52f5a8b730dfd-SJC0%
9d7211e3690rssw-AMS0%
9de96f15985e3741-PDX0%
9da375db8dbc346b-SEA0%
9dcc4dac2aa1cce5-SJC0%
9d719db358a50bee-PDX0%
9d7483febca558c2-PDX0%
87d22a6258ccec70-SEA0%
9d7211e3690a6zss-AMS0%