What IP ranges are used by Workplace?

This article is only applicable to users of Workplace Advanced.
If you need more control over access to Workplace on a corporate network, you can choose to allowlist the IP ranges of Facebook web servers from which Workplace is served.
Facebook's Autonomous System (AS) number AS32934 can be used to retrieve an accurate and up-to-date list of IP addresses of Facebook web servers. For example:
whois -h whois.radb.net — '-i origin AS32934' | grep ^route
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