I suppose it is, but to me it came as a bit of a surprise that if I want to send mail to someone in a certain area, I can essentially toss a coin when trying to figure out which city name to use as long as I don’t use certain ones that are discouraged names. I believe my ZIP code has two city names I could use, but I would never use the non-main one because in my mind, that other city is miles away.

That struck me, although I already knew that a ZIP code could span multiple cities and sometimes even states. I just thought there would be no confusion about which city name to use.

I’m almost positive you can omit city name completely and just include a street address and zip code.