General availability: Wildcard listener on Application Gateways

Azure Application Gateway now supports the use of wildcard characters such as asterisk (*) and question mark (?) for hostnames on a multi-site HTTP(S) listener. You can now route requests from multiple host-names such as shop.contoso.com, accounts.contoso.com, pay.contoso.com to the same backend pool through a single listener configured with a wildcard hostname such as *.contoso.com.  

Learn more about wildcard listener.