Rocco,
The ListRoutePlanReq is just performing a SQL query for you. When it ask for the dnOrPattern use the SQL pattern i.e 55% would return 55 and anything after that. This is also true for type and partition. i.e if you have a partition name "MyPT" and you search "My%" it would return "MyPT" You can also flip these around and use %55 which would return 12355. You can even do %55% which would return 125534. Hope this helps!