# Cloudflare Ray ID

A **Cloudflare Ray ID** is an identifier given to every request that goes through Cloudflare.

Ray IDs are particularly useful when evaluating Security Events for patterns or false positives or more generally understanding your application traffic.

All customers can view Ray IDs and associated information — IP address, user agent, ASN, etc. — by looking through the Activity Log in Security Events.

Additionally, you can add filters to look for specific Ray IDs.

Please note that Security Events may use sampled data to improve performance. If sampled data is applied to your search, you might not see all events, and filters might not return the expected results. To display more events, select a smaller timeframe.

Enterprise customers can enable Ray ID as a field in their Cloudflare Logs.

For more details about sending Ray IDs to your server logs, refer to the CF-Ray header.