In article , wrote:
What you're looking for is an airway database. Even the IFR Garmins
don't have that. Those are the domain of airliners and biz jets for
the most part.

You should check out the CNX-80. The airways are in the database, and
you enter clearances just the way the controller reads them to you,
including the airways. No need to search a paper chart to find all the
intermediate airway fixes.

The CNX-80 is an awesome box.