ZIP Code Area 211XX
- ZIP Code Area 21102
- ZIP Code Area 21104
- ZIP Code Area 21105
- ZIP Code Area 21108
- ZIP Code Area 21111
- ZIP Code Area 21113
- ZIP Code Area 21114
- ZIP Code Area 21117
- ZIP Code Area 21120
- ZIP Code Area 21122
- ZIP Code Area 21128
- ZIP Code Area 21130
- ZIP Code Area 21131
- ZIP Code Area 21132
- ZIP Code Area 21133
- ZIP Code Area 21136
- ZIP Code Area 21140
- ZIP Code Area 21144
- ZIP Code Area 21146
- ZIP Code Area 21152
- ZIP Code Area 21153
- ZIP Code Area 21154
- ZIP Code Area 21155
- ZIP Code Area 21156
- ZIP Code Area 21157
- ZIP Code Area 21158
- ZIP Code Area 21160
- ZIP Code Area 21161
- ZIP Code Area 21162
- ZIP Code Area 21163