"Your access has been blocked for network security reasons." and IP address blocked errors

On rare occasions, servers will be blocked from accessing vimeo.com resources. When this happens, we return the following messages:

• An HTTP 403 error
• error_code :“3500”
• developer_message: “You have been banned. Contact vimeo support for more information.”
• An x-banned-ip header with the exact IP address banned in our system
• A W4A0F6 error for users whose IP addresses are temporarily blocked.

If this happens to you, please contact Support and provide the following details:

• A screenshot of the "Your access has been blocked for network security reasons" screen with the error message.
• The exact request you’re making to the API (if you have this information)
• The exact IP address returned in the response’s x-banned-ip header (if you have this information)