What IP Address Should I Whitelist for AssemblyAI?

AssemblyAI sends all webhook deliveries from fixed IP addresses:

When retrieving audio files submitted by your account, our systems use dynamic IP addresses by default. If your network security requirements require a static IP address for these retrieval requests, please contact us to enable this feature for your account.

Once enabled, audio retrieval requests will be routed through the same fixed IP addresses listed above.