Hey there! Thanks for sharing your feedback. Typically, in Atlas, we have always treated Projects as the trust boundary and therefore access control and authorization have always been configured at the project level. A shareable list is an interesting idea that we had not considered before, and is something we can consider for future improvement. We have also seen many customers leverage infrastructure-as-code (e.g. Terraform or AWS CDK) to manage common templates that should be applied to multiple Atlas projects. Is that something you have used/considered before, and/or found not suitable?

AWS provides Prefix List management, enabling teams to create and centrally manage shared IP address lists for whitelisting. This greatly simplifies administration by allowing multiple services, security groups, and accounts to reference the same reusable IP set.

MongoDB Atlas currently manages IP access lists on a per-project basis. However, many organizations operate multiple projects and environments (dev, staging, production) that require consistent and centrally maintained IP whitelisting.

Requested Feature:

Introduce an organization-level reusable IP list (similar to AWS Prefix Lists) that can be referenced across multiple Atlas projects. This would provide:

• Centralized management of trusted IP ranges

• Reduced duplication and configuration drift

• Easier updates—modify once, apply everywhere

• Improved security consistency across environments

• Simplified automation and governance

This feature would significantly enhance operational efficiency for organizations managing multi-project Atlas deployments.