@Muhammad Hammad Naeem Welcome to Microsoft Q&A forum and thanks for reaching out here.
Azure Analysis Services does not use fixed IP addresses or Service Tags. The range of IP addresses your Analysis Services servers use can be anything in the range of IP addresses for the Azure region. You have to provide the full range of IP addresses for the Azure region which you can download from here: Azure IP Ranges and Service Tags – Public Cloud
For more AAS network related scenarios, please refer to this article: Frequently asked questions about Analysis Services network connectivity
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