Meta crawlers (Facebook & related)
Official developer documentation for web crawlers and fetchers used by Meta products.
Official sources
User agents
-
facebookexternalhit/1.1 -
Facebot
Meta
Meta documents crawlers used for Facebook and related products (user agents, verification, and network guidance).
Autonomous systems
Commonly cited Meta / Facebook ASNs
AS32934 is widely associated with Meta/Facebook in public routing data; additional related ASNs may appear. Verify with Meta’s developer documentation and live WHOIS.
Announced under this company
AS32934
Published ranges
Official documentation and feeds for each product—open the links for current ranges and verification guidance.