Hi Kimberley - Thanks for reaching out.
If you do a nslook up for your storage endpoint like <storageaccoutname>.blob.core.windows.net you will get the public IP corresponding to your storage account.
However, in case your ask is around the Public IP Ranges, you can refer to the below link:
Hope that helps!
Please let me know if there are any further queries/concerns, will be glad to assist.
Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.