@@REMSERVER (Transact-SQL)
Applies to: 
SQL Server
Azure SQL Managed Instance
Important
This feature will be removed in a future version of SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature. This function exists for backward compatibility and always returns NULL. Use linked servers and linked server stored procedures instead.
Returns the name of the remote SQL Server database server as it appears in the login record.
Transact-SQL syntax conventions
Syntax
@@REMSERVER
Return Types
nvarchar(128)
Remarks
@@REMSERVER enables a stored procedure to check the name of the database server from which the procedure is run.
Examples
The following example creates the procedure usp_CheckServer that returns the name of the remote server.
CREATE PROCEDURE usp_CheckServer
AS
SELECT @@REMSERVER;
The following stored procedure is created on the local server SEATTLE1. The user logs on to a remote server, LONDON2, and runs usp_CheckServer.
EXEC SEATTLE1...usp_CheckServer;
Here's the result set.
---------------
LONDON2