Hi @dan.atkinson, unfortunately it is not possible to have particular subdomains (customer-related) for the media assets. For using Cloudflare with assets from Contentful, you would need an APP. We don’t offer this APP specifically for Cloudflare out of the box. However we have similar one for Cloudinary (https://www.contentful.com/marketplace/app/cloudinary/). The source code is on Github, and if you want you could modify for your needs.
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