ZIP Code Area 503XX
- ZIP Code Area 50309
- ZIP Code Area 50310
- ZIP Code Area 50311
- ZIP Code Area 50312
- ZIP Code Area 50313
- ZIP Code Area 50314
- ZIP Code Area 50315
- ZIP Code Area 50316
- ZIP Code Area 50317
- ZIP Code Area 50319
- ZIP Code Area 50320
- ZIP Code Area 50321
- ZIP Code Area 50322
- ZIP Code Area 50323
- ZIP Code Area 50324
- ZIP Code Area 50325
- ZIP Code Area 50327