ZIP Code Area 421XX
- ZIP Code Area 42101
- ZIP Code Area 42102
- ZIP Code Area 42103
- ZIP Code Area 42104
- ZIP Code Area 42120
- ZIP Code Area 42122
- ZIP Code Area 42123
- ZIP Code Area 42124
- ZIP Code Area 42127
- ZIP Code Area 42129
- ZIP Code Area 42130
- ZIP Code Area 42133
- ZIP Code Area 42134
- ZIP Code Area 42140
- ZIP Code Area 42141
- ZIP Code Area 42151
- ZIP Code Area 42153
- ZIP Code Area 42154
- ZIP Code Area 42156
- ZIP Code Area 42157
- ZIP Code Area 42159
- ZIP Code Area 42160
- ZIP Code Area 42163
- ZIP Code Area 42164
- ZIP Code Area 42166
- ZIP Code Area 42167
- ZIP Code Area 42170
- ZIP Code Area 42171