facebookexternalhit
by Meta
About this crawler
Meta crawler used for shared link previews on Facebook, Instagram, and Messenger.
Usually means: An AI provider's bot accessed this URL outside the usual answer, indexing, or training flows.
User agent
facebookexternalhitReignat matches these as user-agent tokens, not full browser strings. Providers may add surrounding version or product text.
IP verification
i
Identified by user agent only
Meta does not publish IP ranges for this crawler, so the crawl is recorded but marked unverifiable rather than IP-verified.
1
User agent
Request user agent contains facebookexternalhit.
2
Request IP
Server-side tracking forwards the crawler IP seen by your backend.
3
Range check
No published ranges exist, so the IP can't be confirmed.