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Amazon VPC IPAM automates prefix list updates

Posted on: Oct 31, 2025

Today, we announced the ability for Amazon VPC IP Address Manager (IPAM) to automate prefix lists updates with prefix list resolver (PLR). This feature allows network administrators to automatically update prefix lists based on their business logic in IPAM improving their operational posture and reducing overhead.

Using IPAM PLR, you can define business rules for synchronizing prefix lists with IP address ranges from various resources, such as VPCs, Subnets and IPAM pools. These prefix lists can then be referenced in resources such as Route Tables and Security Groups within your Amazon Web Service cloud environment, based on your connectivity requirements. Previously, you had to manually update your prefix lists to add or remove IP address ranges based on changes to your resources. This was operationally complex and error prone. IPAM PLR automates prefix list updates requiring no manual intervention, improving your operational posture.

This feature is available in Amazon Web Services China (Beijing) Region, operated by Sinnet and Amazon Web Services China (Ningxia) Region, operated by NWCD.

To learn more about prefix list resolvers, view the IPAM documentation. For details on pricing, refer to the IPAM tab on the Amazon VPC Pricing Page.