Portal
The Inbound, Outbound, and Possible Outbound addresses can be located in the Azure portal by selecting your web app and clicking the Properties blade:
Azure cli
The Virtual IP address can be retrieved with an nslookup command:
nslookup <app-name>.azurewebsites.net
The Outbound address can be retrieved with the following az cli command:
az webapp show --resource-group az webapp show --resource-group <group_name> --name <app_name> --query outboundIpAddresses --output tsv
The Additional Outbound addresses can be retrieved with the following az cli command:
az webapp show --resource-group <group_name> --name <app_name> --query possibleOutboundIpAddresses --output tsv