ZIP Code Area 215XX
- ZIP Code Area 21502
- ZIP Code Area 21520
- ZIP Code Area 21521
- ZIP Code Area 21522
- ZIP Code Area 21523
- ZIP Code Area 21524
- ZIP Code Area 21529
- ZIP Code Area 21530
- ZIP Code Area 21531
- ZIP Code Area 21532
- ZIP Code Area 21536
- ZIP Code Area 21538
- ZIP Code Area 21539
- ZIP Code Area 21540
- ZIP Code Area 21541
- ZIP Code Area 21542
- ZIP Code Area 21543
- ZIP Code Area 21545
- ZIP Code Area 21550
- ZIP Code Area 21555
- ZIP Code Area 21557
- ZIP Code Area 21561
- ZIP Code Area 21562