ZIP Code Area 540XX
- ZIP Code Area 54001
- ZIP Code Area 54002
- ZIP Code Area 54003
- ZIP Code Area 54004
- ZIP Code Area 54005
- ZIP Code Area 54006
- ZIP Code Area 54007
- ZIP Code Area 54009
- ZIP Code Area 54010
- ZIP Code Area 54011
- ZIP Code Area 54013
- ZIP Code Area 54014
- ZIP Code Area 54015
- ZIP Code Area 54016
- ZIP Code Area 54017
- ZIP Code Area 54020
- ZIP Code Area 54021
- ZIP Code Area 54022
- ZIP Code Area 54023
- ZIP Code Area 54024
- ZIP Code Area 54025
- ZIP Code Area 54026
- ZIP Code Area 54027
- ZIP Code Area 54028
- ZIP Code Area 54082