Can RDS switches to IPV6 only?

Question

I just found out that the free tier RDS ipv4 address started to charge monthly fee. I'm currently connecting DB through public endpoint. I checked the document and it seems the to access the RDS publicly, it must be ipv4 or dual stack mode. Either way requires an ipv4 address. Does it mean public RDS isn't free anymore? I'm wondering if it is possible to connect an ipv6 address with the RDS endpoint and remove the ipv4 address.

Thanks.

Oleksii Bebych · Answer

Effective February 1, 2024, there is a charge of $0.005 per IP per hour for all public IPv4 addresses, whether attached to a service or not (there was already a charge for public IPv4 addresses you allocate in your account but don’t attach to an EC2 instance).

This change applies to all AWS services, including Amazon Elastic Compute Cloud (Amazon EC2), Amazon Relational Database Service (RDS) database instances, Amazon Elastic Kubernetes Service (Amazon EKS) nodes, and other AWS services that can have a public IPv4 address allocated and attached, in all AWS regions (commercial, AWS China, and GovCloud).
https://aws.amazon.com/blogs/aws/new-aws-public-ipv4-address-charge-public-ip-insights/

Here are some resources to show you how to use IPv6 with widely used services
https://d1.awsstatic.com/architecture-diagrams/ArchitectureDiagrams/IPv6-reference-architectures-for-AWS-and-hybrid-networks-ra.pdf

Can RDS switches to IPV6 only?

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