Bob Noel wrote:

Look at the beginning of the AFD, specifically the Directory Legend.
You'll see:

CITY NAME
Airport Name (Alternate Name)

It would seem that using the Airport Name (or alternate) from the AFD
is a perfectly reasonable thing to do. No one could fault you for that.

I agree with Bob and a number of other posters that you should be
looking at the A/FD at flight planning time. You do flight plan, right?

Hm....let's see if "municipality name" v "airport name" works.

BJC. If you call "Boulder Tower" or "Broomfield Tower" you'll either
get ignored or laughed at. Boulder Airport doesn't have a tower, and
BJC is referred to as "Jeffco".

APA. The city of Centennial was just created a few years ago, but
prior to that, it was unincorporated county land, and the airport's been
there for ...um...30 years or so?

FTG. OK, call Denver Tower. You'll get laughed at. Denver Tower is
DIA (KDEN) 5 nm away. Or the closest town is Watkins. OK, fine, call
for Watkins Tower. No one will have the slightest idea what you're
talking about.

My favorite is GXY. Greely. Greel Weld. Weld County. You can hear
all three in the space of 60 seconds.