do you mean parent tables? if yes use logic like
select distinct o.object_id as tblid,OBJECT_NAME(o.object_id) as tblname,c.name
from sys.objects o
inner join sys.columns c
on c.object_id = o.object_id
left join sys.foreign_keys f
on f.parent_object_id = o.object_id
where o.is_ms_shipped=0
and o.type='u'
and f.parent_object_id is null
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SQL Server MVP
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