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, FAYETTE, IA 52142-0001
PO BOX 2, FAYETTE, IA 52142-0002
PO BOX 3, FAYETTE, IA 52142-0003
PO BOX 4, FAYETTE, IA 52142-0004
PO BOX 5, FAYETTE, IA 52142-0005
PO BOX 6, FAYETTE, IA 52142-0006
PO BOX 7, FAYETTE, IA 52142-0007
PO BOX 8, FAYETTE, IA 52142-0008
PO BOX 9, FAYETTE, IA 52142-0009
PO BOX 10, FAYETTE, IA 52142-0010
PO BOX 11, FAYETTE, IA 52142-0011
PO BOX 12, FAYETTE, IA 52142-0012
PO BOX 13, FAYETTE, IA 52142-0013
PO BOX 14, FAYETTE, IA 52142-0014
PO BOX 15, FAYETTE, IA 52142-0015
PO BOX 16, FAYETTE, IA 52142-0016
PO BOX 17, FAYETTE, IA 52142-0017
PO BOX 18, FAYETTE, IA 52142-0018
PO BOX 19, FAYETTE, IA 52142-0019
PO BOX 20, FAYETTE, IA 52142-0020
PO BOX 21, FAYETTE, IA 52142-0021
PO BOX 22, FAYETTE, IA 52142-0022
PO BOX 23, FAYETTE, IA 52142-0023
PO BOX 24, FAYETTE, IA 52142-0024
PO BOX 25, FAYETTE, IA 52142-0025
PO BOX 26, FAYETTE, IA 52142-0026
PO BOX 27, FAYETTE, IA 52142-0027
PO BOX 28, FAYETTE, IA 52142-0028
PO BOX 29, FAYETTE, IA 52142-0029
PO BOX 30, FAYETTE, IA 52142-0030
PO BOX 31, FAYETTE, IA 52142-0031
PO BOX 32, FAYETTE, IA 52142-0032
PO BOX 33, FAYETTE, IA 52142-0033
PO BOX 34, FAYETTE, IA 52142-0034
PO BOX 35, FAYETTE, IA 52142-0035
PO BOX 36, FAYETTE, IA 52142-0036
PO BOX 37, FAYETTE, IA 52142-0037
PO BOX 38, FAYETTE, IA 52142-0038
PO BOX 39, FAYETTE, IA 52142-0039
PO BOX 40, FAYETTE, IA 52142-0040
PO BOX 41, FAYETTE, IA 52142-0041
PO BOX 42, FAYETTE, IA 52142-0042
PO BOX 43, FAYETTE, IA 52142-0043
PO BOX 44, FAYETTE, IA 52142-0044
PO BOX 45, FAYETTE, IA 52142-0045
PO BOX 46, FAYETTE, IA 52142-0046
PO BOX 47, FAYETTE, IA 52142-0047
PO BOX 48, FAYETTE, IA 52142-0048
PO BOX 49, FAYETTE, IA 52142-0049
PO BOX 50, FAYETTE, IA 52142-0050
PO BOX 51, FAYETTE, IA 52142-0051
PO BOX 52, FAYETTE, IA 52142-0052
PO BOX 53, FAYETTE, IA 52142-0053
PO BOX 54, FAYETTE, IA 52142-0054
PO BOX 55, FAYETTE, IA 52142-0055
PO BOX 56, FAYETTE, IA 52142-0056
PO BOX 57, FAYETTE, IA 52142-0057
PO BOX 58, FAYETTE, IA 52142-0058
PO BOX 59, FAYETTE, IA 52142-0059
PO BOX 60, FAYETTE, IA 52142-0060
PO BOX 61, FAYETTE, IA 52142-0061
PO BOX 62, FAYETTE, IA 52142-0062
PO BOX 63, FAYETTE, IA 52142-0063
PO BOX 64, FAYETTE, IA 52142-0064
PO BOX 65, FAYETTE, IA 52142-0065
PO BOX 66, FAYETTE, IA 52142-0066
PO BOX 67, FAYETTE, IA 52142-0067
PO BOX 68, FAYETTE, IA 52142-0068
PO BOX 69, FAYETTE, IA 52142-0069
PO BOX 70, FAYETTE, IA 52142-0070
PO BOX 71, FAYETTE, IA 52142-0071
PO BOX 72, FAYETTE, IA 52142-0072
PO BOX 73, FAYETTE, IA 52142-0073
PO BOX 74, FAYETTE, IA 52142-0074
PO BOX 75, FAYETTE, IA 52142-0075
PO BOX 76, FAYETTE, IA 52142-0076
PO BOX 77, FAYETTE, IA 52142-0077
PO BOX 78, FAYETTE, IA 52142-0078
PO BOX 79, FAYETTE, IA 52142-0079
PO BOX 80, FAYETTE, IA 52142-0080
PO BOX 81, FAYETTE, IA 52142-0081
PO BOX 82, FAYETTE, IA 52142-0082
PO BOX 83, FAYETTE, IA 52142-0083
PO BOX 84, FAYETTE, IA 52142-0084
PO BOX 85, FAYETTE, IA 52142-0085
PO BOX 86, FAYETTE, IA 52142-0086
PO BOX 87, FAYETTE, IA 52142-0087
PO BOX 88, FAYETTE, IA 52142-0088
PO BOX 89, FAYETTE, IA 52142-0089
PO BOX 90, FAYETTE, IA 52142-0090
PO BOX 91, FAYETTE, IA 52142-0091
PO BOX 92, FAYETTE, IA 52142-0092
PO BOX 93, FAYETTE, IA 52142-0093
PO BOX 94, FAYETTE, IA 52142-0094
PO BOX 95, FAYETTE, IA 52142-0095
PO BOX 96, FAYETTE, IA 52142-0096
PO BOX 97, FAYETTE, IA 52142-0097
PO BOX 98, FAYETTE, IA 52142-0098
PO BOX 99, FAYETTE, IA 52142-0099
PO BOX 100, FAYETTE, IA 52142-0100
PO BOX 101, FAYETTE, IA 52142-0101
PO BOX 102, FAYETTE, IA 52142-0102
PO BOX 103, FAYETTE, IA 52142-0103
PO BOX 104, FAYETTE, IA 52142-0104
PO BOX 105, FAYETTE, IA 52142-0105
PO BOX 106, FAYETTE, IA 52142-0106
PO BOX 107, FAYETTE, IA 52142-0107
PO BOX 108, FAYETTE, IA 52142-0108
PO BOX 109, FAYETTE, IA 52142-0109
PO BOX 110, FAYETTE, IA 52142-0110
PO BOX 111, FAYETTE, IA 52142-0111
PO BOX 112, FAYETTE, IA 52142-0112
PO BOX 113, FAYETTE, IA 52142-0113
PO BOX 114, FAYETTE, IA 52142-0114
PO BOX 115, FAYETTE, IA 52142-0115
PO BOX 116, FAYETTE, IA 52142-0116
PO BOX 117, FAYETTE, IA 52142-0117
PO BOX 118, FAYETTE, IA 52142-0118
PO BOX 119, FAYETTE, IA 52142-0119
PO BOX 120, FAYETTE, IA 52142-0120
PO BOX 121, FAYETTE, IA 52142-0121
PO BOX 122, FAYETTE, IA 52142-0122
PO BOX 123, FAYETTE, IA 52142-0123
PO BOX 124, FAYETTE, IA 52142-0124
PO BOX 125, FAYETTE, IA 52142-0125
PO BOX 126, FAYETTE, IA 52142-0126
PO BOX 127, FAYETTE, IA 52142-0127
PO BOX 128, FAYETTE, IA 52142-0128
PO BOX 129, FAYETTE, IA 52142-0129
PO BOX 130, FAYETTE, IA 52142-0130
PO BOX 131, FAYETTE, IA 52142-0131
PO BOX 132, FAYETTE, IA 52142-0132
PO BOX 133, FAYETTE, IA 52142-0133
PO BOX 134, FAYETTE, IA 52142-0134
PO BOX 135, FAYETTE, IA 52142-0135
PO BOX 136, FAYETTE, IA 52142-0136
PO BOX 137, FAYETTE, IA 52142-0137
PO BOX 138, FAYETTE, IA 52142-0138
PO BOX 139, FAYETTE, IA 52142-0139
PO BOX 140, FAYETTE, IA 52142-0140
PO BOX 141, FAYETTE, IA 52142-0141
PO BOX 142, FAYETTE, IA 52142-0142
PO BOX 143, FAYETTE, IA 52142-0143
PO BOX 144, FAYETTE, IA 52142-0144
PO BOX 145, FAYETTE, IA 52142-0145
PO BOX 146, FAYETTE, IA 52142-0146
PO BOX 147, FAYETTE, IA 52142-0147
PO BOX 148, FAYETTE, IA 52142-0148
PO BOX 149, FAYETTE, IA 52142-0149
PO BOX 150, FAYETTE, IA 52142-0150
PO BOX 151, FAYETTE, IA 52142-0151
PO BOX 152, FAYETTE, IA 52142-0152
PO BOX 153, FAYETTE, IA 52142-0153
PO BOX 154, FAYETTE, IA 52142-0154
PO BOX 155, FAYETTE, IA 52142-0155
PO BOX 156, FAYETTE, IA 52142-0156
PO BOX 157, FAYETTE, IA 52142-0157
PO BOX 158, FAYETTE, IA 52142-0158
PO BOX 159, FAYETTE, IA 52142-0159
PO BOX 160, FAYETTE, IA 52142-0160
PO BOX 161, FAYETTE, IA 52142-0161
PO BOX 162, FAYETTE, IA 52142-0162
PO BOX 163, FAYETTE, IA 52142-0163
PO BOX 164, FAYETTE, IA 52142-0164
PO BOX 165, FAYETTE, IA 52142-0165
PO BOX 166, FAYETTE, IA 52142-0166
PO BOX 167, FAYETTE, IA 52142-0167
PO BOX 168, FAYETTE, IA 52142-0168
PO BOX 169, FAYETTE, IA 52142-0169
PO BOX 170, FAYETTE, IA 52142-0170
PO BOX 171, FAYETTE, IA 52142-0171
PO BOX 172, FAYETTE, IA 52142-0172
PO BOX 173, FAYETTE, IA 52142-0173
PO BOX 174, FAYETTE, IA 52142-0174
PO BOX 175, FAYETTE, IA 52142-0175
PO BOX 176, FAYETTE, IA 52142-0176
PO BOX 177, FAYETTE, IA 52142-0177
PO BOX 178, FAYETTE, IA 52142-0178
PO BOX 179, FAYETTE, IA 52142-0179
PO BOX 180, FAYETTE, IA 52142-0180
PO BOX 181, FAYETTE, IA 52142-0181
PO BOX 182, FAYETTE, IA 52142-0182
PO BOX 183, FAYETTE, IA 52142-0183
PO BOX 184, FAYETTE, IA 52142-0184
PO BOX 185, FAYETTE, IA 52142-0185
PO BOX 186, FAYETTE, IA 52142-0186
PO BOX 187, FAYETTE, IA 52142-0187
PO BOX 188, FAYETTE, IA 52142-0188
PO BOX 189, FAYETTE, IA 52142-0189
PO BOX 190, FAYETTE, IA 52142-0190
PO BOX 191, FAYETTE, IA 52142-0191
PO BOX 192, FAYETTE, IA 52142-0192
PO BOX 193, FAYETTE, IA 52142-0193
PO BOX 194, FAYETTE, IA 52142-0194
PO BOX 195, FAYETTE, IA 52142-0195
PO BOX 196, FAYETTE, IA 52142-0196
PO BOX 197, FAYETTE, IA 52142-0197
PO BOX 198, FAYETTE, IA 52142-0198
PO BOX 199, FAYETTE, IA 52142-0199
PO BOX 200, FAYETTE, IA 52142-0200
PO BOX 201, FAYETTE, IA 52142-0201
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