Can the airport name be omitted when contacting ATC if the frequency is not used by any other nearby airports?
When every transmission to the tower begins with "Executive Tower...." that is the keyword that makes the controller's ears perk up and start taking notes.

If you don't say the magic words, your controller may be a step or two behind as you rattle off your request.



Also, you think you're on the right frequency, and you think you know who you're talking to, but what if you mis-tuned the frequency knob by a digit or two, or forgot to hit the COM1/COM2 button?  You could be talking to the wrong receiver and not know it.  That is how airplanes sometimes land at the wrong airport.

Every initial transmission should start with the intended receiver; that is part of the rules and just common sense.  Don't try to shorten transmissions and end up causing more work for everyone.