Thank you for your question. You're right to seek clarification on this.
According to the official Azure update, Basic SKU public IP addresses will be retired on 30 September 2025. However, there's an important exception noted:
"If you have any Basic SKU public IP addresses deployed in Azure Cloud Services (extended support), those deployments will not be affected by this retirement and you don't need to take any action for them."
So, if your nine Basic SKU public IPs are used with Azure Cloud Services (Extended Support), then they are not affected by the retirement, and no action is needed.
However, if these IP addresses are being used with other services such as Virtual Machines, Load Balancers, or other resource types, they will be impacted, and you’ll need to migrate them to Standard SKU before the deadline.
To determine whether you're using Azure Cloud Services (Extended Support), check the type of service or deployment model associated with those IPs. If they are linked to classic cloud service deployments (often labeled as “Cloud Services (extended support)” in the Azure Portal), then you're in the clear.
Hope this helps clarify the situation.