A PO BOX number can be less than or more than four digit. For post office boxes, the general rule is that each box has its own ZIP+4 code.
The last four digit is often one of the following:
1. Zero plus the last three digits of the box number (eg. PO BOX 1001, Los Angeles CA 90001-0001).
2. The last four digits of the box number (eg. PO BOX 9991, Twin Peaks CA 92391-9991).
3. If the box number is less than four digits, enough zeros prepended to the front of the box number to produce a four-digit number(eg. PO BOX 1, Shreveport LA 71161-0001).
However, there is no uniform rule, the zip code plus four is for reference only, the ZIP+4 code must be looked up individually for each box in the USPS offical website.
PO BOX 1, FARMERSBURG, IA 52047-0001
PO BOX 2, FARMERSBURG, IA 52047-0002
PO BOX 3, FARMERSBURG, IA 52047-0003
PO BOX 4, FARMERSBURG, IA 52047-0004
PO BOX 5, FARMERSBURG, IA 52047-0005
PO BOX 6, FARMERSBURG, IA 52047-0006
PO BOX 7, FARMERSBURG, IA 52047-0007
PO BOX 8, FARMERSBURG, IA 52047-0008
PO BOX 9, FARMERSBURG, IA 52047-0009
PO BOX 10, FARMERSBURG, IA 52047-0010
PO BOX 11, FARMERSBURG, IA 52047-0011
PO BOX 12, FARMERSBURG, IA 52047-0012
PO BOX 13, FARMERSBURG, IA 52047-0013
PO BOX 14, FARMERSBURG, IA 52047-0014
PO BOX 15, FARMERSBURG, IA 52047-0015
PO BOX 16, FARMERSBURG, IA 52047-0016
PO BOX 17, FARMERSBURG, IA 52047-0017
PO BOX 18, FARMERSBURG, IA 52047-0018
PO BOX 19, FARMERSBURG, IA 52047-0019
PO BOX 20, FARMERSBURG, IA 52047-0020
PO BOX 21, FARMERSBURG, IA 52047-0021
PO BOX 22, FARMERSBURG, IA 52047-0022
PO BOX 23, FARMERSBURG, IA 52047-0023
PO BOX 24, FARMERSBURG, IA 52047-0024
PO BOX 25, FARMERSBURG, IA 52047-0025
PO BOX 26, FARMERSBURG, IA 52047-0026
PO BOX 27, FARMERSBURG, IA 52047-0027
PO BOX 28, FARMERSBURG, IA 52047-0028
PO BOX 29, FARMERSBURG, IA 52047-0029
PO BOX 30, FARMERSBURG, IA 52047-0030
PO BOX 31, FARMERSBURG, IA 52047-0031
PO BOX 32, FARMERSBURG, IA 52047-0032
PO BOX 33, FARMERSBURG, IA 52047-0033
PO BOX 34, FARMERSBURG, IA 52047-0034
PO BOX 35, FARMERSBURG, IA 52047-0035
PO BOX 36, FARMERSBURG, IA 52047-0036
PO BOX 37, FARMERSBURG, IA 52047-0037
PO BOX 38, FARMERSBURG, IA 52047-0038
PO BOX 39, FARMERSBURG, IA 52047-0039
PO BOX 40, FARMERSBURG, IA 52047-0040
PO BOX 41, FARMERSBURG, IA 52047-0041
PO BOX 42, FARMERSBURG, IA 52047-0042
PO BOX 43, FARMERSBURG, IA 52047-0043
PO BOX 44, FARMERSBURG, IA 52047-0044
PO BOX 45, FARMERSBURG, IA 52047-0045
PO BOX 46, FARMERSBURG, IA 52047-0046
PO BOX 47, FARMERSBURG, IA 52047-0047
PO BOX 48, FARMERSBURG, IA 52047-0048
PO BOX 49, FARMERSBURG, IA 52047-0049
PO BOX 50, FARMERSBURG, IA 52047-0050
PO BOX 51, FARMERSBURG, IA 52047-0051
PO BOX 52, FARMERSBURG, IA 52047-0052
PO BOX 53, FARMERSBURG, IA 52047-0053
PO BOX 54, FARMERSBURG, IA 52047-0054
PO BOX 55, FARMERSBURG, IA 52047-0055
PO BOX 56, FARMERSBURG, IA 52047-0056
PO BOX 57, FARMERSBURG, IA 52047-0057
PO BOX 58, FARMERSBURG, IA 52047-0058
PO BOX 59, FARMERSBURG, IA 52047-0059
PO BOX 60, FARMERSBURG, IA 52047-0060
PO BOX 61, FARMERSBURG, IA 52047-0061
PO BOX 62, FARMERSBURG, IA 52047-0062
PO BOX 63, FARMERSBURG, IA 52047-0063
PO BOX 64, FARMERSBURG, IA 52047-0064
PO BOX 65, FARMERSBURG, IA 52047-0065
PO BOX 66, FARMERSBURG, IA 52047-0066
PO BOX 67, FARMERSBURG, IA 52047-0067
PO BOX 68, FARMERSBURG, IA 52047-0068
PO BOX 69, FARMERSBURG, IA 52047-0069
PO BOX 70, FARMERSBURG, IA 52047-0070
PO BOX 71, FARMERSBURG, IA 52047-0071
PO BOX 72, FARMERSBURG, IA 52047-0072
PO BOX 73, FARMERSBURG, IA 52047-0073
PO BOX 74, FARMERSBURG, IA 52047-0074
PO BOX 75, FARMERSBURG, IA 52047-0075
PO BOX 76, FARMERSBURG, IA 52047-0076
PO BOX 77, FARMERSBURG, IA 52047-0077
PO BOX 78, FARMERSBURG, IA 52047-0078
PO BOX 79, FARMERSBURG, IA 52047-0079
PO BOX 80, FARMERSBURG, IA 52047-0080
PO BOX 81, FARMERSBURG, IA 52047-0081
PO BOX 82, FARMERSBURG, IA 52047-0082
PO BOX 83, FARMERSBURG, IA 52047-0083
PO BOX 84, FARMERSBURG, IA 52047-0084
PO BOX 85, FARMERSBURG, IA 52047-0085
PO BOX 86, FARMERSBURG, IA 52047-0086
PO BOX 87, FARMERSBURG, IA 52047-0087
PO BOX 88, FARMERSBURG, IA 52047-0088
PO BOX 89, FARMERSBURG, IA 52047-0089
PO BOX 90, FARMERSBURG, IA 52047-0090
PO BOX 91, FARMERSBURG, IA 52047-0091
PO BOX 92, FARMERSBURG, IA 52047-0092
PO BOX 93, FARMERSBURG, IA 52047-0093
PO BOX 94, FARMERSBURG, IA 52047-0094
PO BOX 95, FARMERSBURG, IA 52047-0095
PO BOX 96, FARMERSBURG, IA 52047-0096
PO BOX 97, FARMERSBURG, IA 52047-0097
PO BOX 98, FARMERSBURG, IA 52047-0098
PO BOX 99, FARMERSBURG, IA 52047-0099
PO BOX 100, FARMERSBURG, IA 52047-0100
PO BOX 101, FARMERSBURG, IA 52047-0101
PO BOX 102, FARMERSBURG, IA 52047-0102
PO BOX 103, FARMERSBURG, IA 52047-0103
PO BOX 104, FARMERSBURG, IA 52047-0104
PO BOX 105, FARMERSBURG, IA 52047-0105
PO BOX 106, FARMERSBURG, IA 52047-0106
PO BOX 107, FARMERSBURG, IA 52047-0107
PO BOX 108, FARMERSBURG, IA 52047-0108
PO BOX 109, FARMERSBURG, IA 52047-0109
PO BOX 110, FARMERSBURG, IA 52047-0110
PO BOX 111, FARMERSBURG, IA 52047-0111
PO BOX 112, FARMERSBURG, IA 52047-0112
PO BOX 113, FARMERSBURG, IA 52047-0113
PO BOX 114, FARMERSBURG, IA 52047-0114
PO BOX 115, FARMERSBURG, IA 52047-0115
PO BOX 116, FARMERSBURG, IA 52047-0116
PO BOX 117, FARMERSBURG, IA 52047-0117
PO BOX 118, FARMERSBURG, IA 52047-0118
PO BOX 119, FARMERSBURG, IA 52047-0119
PO BOX 120, FARMERSBURG, IA 52047-0120
PO BOX 121, FARMERSBURG, IA 52047-0121
PO BOX 122, FARMERSBURG, IA 52047-0122
PO BOX 123, FARMERSBURG, IA 52047-0123
PO BOX 124, FARMERSBURG, IA 52047-0124
PO BOX 125, FARMERSBURG, IA 52047-0125
PO BOX 126, FARMERSBURG, IA 52047-0126
PO BOX 127, FARMERSBURG, IA 52047-0127
PO BOX 128, FARMERSBURG, IA 52047-0128
PO BOX 129, FARMERSBURG, IA 52047-0129
PO BOX 130, FARMERSBURG, IA 52047-0130
PO BOX 131, FARMERSBURG, IA 52047-0131
PO BOX 132, FARMERSBURG, IA 52047-0132
PO BOX 133, FARMERSBURG, IA 52047-0133
PO BOX 134, FARMERSBURG, IA 52047-0134
PO BOX 135, FARMERSBURG, IA 52047-0135
PO BOX 136, FARMERSBURG, IA 52047-0136
PO BOX 137, FARMERSBURG, IA 52047-0137
PO BOX 138, FARMERSBURG, IA 52047-0138
PO BOX 139, FARMERSBURG, IA 52047-0139
PO BOX 140, FARMERSBURG, IA 52047-0140
PO BOX 141, FARMERSBURG, IA 52047-0141
PO BOX 142, FARMERSBURG, IA 52047-0142
PO BOX 143, FARMERSBURG, IA 52047-0143
PO BOX 144, FARMERSBURG, IA 52047-0144
PO BOX 145, FARMERSBURG, IA 52047-0145
PO BOX 146, FARMERSBURG, IA 52047-0146
PO BOX 147, FARMERSBURG, IA 52047-0147
PO BOX 148, FARMERSBURG, IA 52047-0148
PO BOX 149, FARMERSBURG, IA 52047-0149
PO BOX 150, FARMERSBURG, IA 52047-0150
PO BOX 151, FARMERSBURG, IA 52047-0151
PO BOX 152, FARMERSBURG, IA 52047-0152
PO BOX 153, FARMERSBURG, IA 52047-0153
PO BOX 154, FARMERSBURG, IA 52047-0154
PO BOX 155, FARMERSBURG, IA 52047-0155
PO BOX 156, FARMERSBURG, IA 52047-0156
PO BOX 157, FARMERSBURG, IA 52047-0157
PO BOX 158, FARMERSBURG, IA 52047-0158
PO BOX 159, FARMERSBURG, IA 52047-0159
PO BOX 160, FARMERSBURG, IA 52047-0160
PO BOX 161, FARMERSBURG, IA 52047-0161
PO BOX 162, FARMERSBURG, IA 52047-0162
PO BOX 163, FARMERSBURG, IA 52047-0163
PO BOX 164, FARMERSBURG, IA 52047-0164
PO BOX 165, FARMERSBURG, IA 52047-0165
PO BOX 166, FARMERSBURG, IA 52047-0166
PO BOX 167, FARMERSBURG, IA 52047-0167
PO BOX 168, FARMERSBURG, IA 52047-0168
PO BOX 169, FARMERSBURG, IA 52047-0169
PO BOX 170, FARMERSBURG, IA 52047-0170
PO BOX 171, FARMERSBURG, IA 52047-0171
PO BOX 172, FARMERSBURG, IA 52047-0172
PO BOX 173, FARMERSBURG, IA 52047-0173
PO BOX 174, FARMERSBURG, IA 52047-0174
PO BOX 175, FARMERSBURG, IA 52047-0175
PO BOX 176, FARMERSBURG, IA 52047-0176
PO BOX 177, FARMERSBURG, IA 52047-0177
PO BOX 178, FARMERSBURG, IA 52047-0178
PO BOX 179, FARMERSBURG, IA 52047-0179
PO BOX 180, FARMERSBURG, IA 52047-0180
PO BOX 181, FARMERSBURG, IA 52047-0181
PO BOX 182, FARMERSBURG, IA 52047-0182
PO BOX 183, FARMERSBURG, IA 52047-0183
PO BOX 184, FARMERSBURG, IA 52047-0184
PO BOX 185, FARMERSBURG, IA 52047-0185
PO BOX 186, FARMERSBURG, IA 52047-0186
PO BOX 187, FARMERSBURG, IA 52047-0187
PO BOX 188, FARMERSBURG, IA 52047-0188
PO BOX 189, FARMERSBURG, IA 52047-0189
PO BOX 190, FARMERSBURG, IA 52047-0190
PO BOX 191, FARMERSBURG, IA 52047-0191
PO BOX 192, FARMERSBURG, IA 52047-0192
PO BOX 193, FARMERSBURG, IA 52047-0193
PO BOX 194, FARMERSBURG, IA 52047-0194
PO BOX 195, FARMERSBURG, IA 52047-0195
PO BOX 196, FARMERSBURG, IA 52047-0196
PO BOX 197, FARMERSBURG, IA 52047-0197
PO BOX 198, FARMERSBURG, IA 52047-0198
PO BOX 199, FARMERSBURG, IA 52047-0199
PO BOX 200, FARMERSBURG, IA 52047-0200
PO BOX 201, FARMERSBURG, IA 52047-0201
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