If I understand correcly, I normally run a query like this assum that I already linked the servers:
select * from tablea
union
select * from [111.11.1.1].db_name.dbo.tablea
union
select * from [111.11.1.2].db_name.dbo.tablea
union
select * from [111.11.1.3].db_name.dbo.tablea
union
select * from [111.11.1.4].db_name.dbo.tablea
and etc...