ZIP Code Area 216XX
- ZIP Code Area 21601
- ZIP Code Area 21607
- ZIP Code Area 21610
- ZIP Code Area 21612
- ZIP Code Area 21613
- ZIP Code Area 21617
- ZIP Code Area 21619
- ZIP Code Area 21620
- ZIP Code Area 21622
- ZIP Code Area 21623
- ZIP Code Area 21624
- ZIP Code Area 21625
- ZIP Code Area 21626
- ZIP Code Area 21627
- ZIP Code Area 21628
- ZIP Code Area 21629
- ZIP Code Area 21631
- ZIP Code Area 21632
- ZIP Code Area 21634
- ZIP Code Area 21635
- ZIP Code Area 21636
- ZIP Code Area 21638
- ZIP Code Area 21639
- ZIP Code Area 21640
- ZIP Code Area 21641
- ZIP Code Area 21643
- ZIP Code Area 21644
- ZIP Code Area 21645
- ZIP Code Area 21647
- ZIP Code Area 21648
- ZIP Code Area 21649
- ZIP Code Area 21650
- ZIP Code Area 21651
- ZIP Code Area 21652
- ZIP Code Area 21653
- ZIP Code Area 21654
- ZIP Code Area 21655
- ZIP Code Area 21657
- ZIP Code Area 21658
- ZIP Code Area 21659
- ZIP Code Area 21660
- ZIP Code Area 21661
- ZIP Code Area 21662
- ZIP Code Area 21663
- ZIP Code Area 21664
- ZIP Code Area 21665
- ZIP Code Area 21666
- ZIP Code Area 21667
- ZIP Code Area 21668
- ZIP Code Area 21669
- ZIP Code Area 21671
- ZIP Code Area 21672
- ZIP Code Area 21673
- ZIP Code Area 21675
- ZIP Code Area 21676
- ZIP Code Area 21677
- ZIP Code Area 21678
- ZIP Code Area 21679