AWS、パブリックIPv4に1ヶ月あたり750時間の無料枠。つまり実質1個までは無料と。
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AWS Free Tier now includes 750 hours of free Public IPv4 addresses, as charges for Public IPv4 begin
https://aws.amazon.com/about-aws/whats-new/2024/02/aws-free-tier-750-hours-free-public-ipv4-addresses/
#bookmarks