Azure DevOps Service Tag have been released
Now that a service tag has been set up for Azure DevOps Services, customers can easily allow access by adding the tag name AzureDevOps to their NSGs or firewalls programmatically using Powershell and CLI. The portal will be supported at a later date. Customers may also use the service tag for on-prem firewall via a JSON file download. Azure Service Tags are supported for inbound connection only from Azure DevOps to customers’ on-prem. Outbound connection from customers’ networks to Azure DevOps is not supported. Customers are still required to allow the Azure Front Door (AFD) IPs provided in the doc for outbound connections. The inbound connection applies to the following scenarios documented here.
Note: Service Tag AzureDevOps is available from the portal now.
However this will not cover IP Ranges of MS Hosted agents