This statement would do it:
SELECT srvname
FROM SYS.SYSSERVER JOIN SYS.SYSTABLE ON SYS.SYSSERVER.srvid = SYS.SYSTABLE.srvid
WHERE SYS.SYSTABLE.table_name = 'your_table_name';
srvname would be the nme of the remote server if you were using a proxy table and hNULL if it was a local table
--Jason