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, CLARE, IA 50524-0001
PO BOX 2, CLARE, IA 50524-0002
PO BOX 3, CLARE, IA 50524-0003
PO BOX 4, CLARE, IA 50524-0004
PO BOX 5, CLARE, IA 50524-0005
PO BOX 6, CLARE, IA 50524-0006
PO BOX 7, CLARE, IA 50524-0007
PO BOX 8, CLARE, IA 50524-0008
PO BOX 9, CLARE, IA 50524-0009
PO BOX 10, CLARE, IA 50524-0010
PO BOX 11, CLARE, IA 50524-0011
PO BOX 12, CLARE, IA 50524-0012
PO BOX 13, CLARE, IA 50524-0013
PO BOX 14, CLARE, IA 50524-0014
PO BOX 15, CLARE, IA 50524-0015
PO BOX 16, CLARE, IA 50524-0016
PO BOX 17, CLARE, IA 50524-0017
PO BOX 18, CLARE, IA 50524-0018
PO BOX 19, CLARE, IA 50524-0019
PO BOX 20, CLARE, IA 50524-0020
PO BOX 21, CLARE, IA 50524-0021
PO BOX 22, CLARE, IA 50524-0022
PO BOX 23, CLARE, IA 50524-0023
PO BOX 24, CLARE, IA 50524-0024
PO BOX 25, CLARE, IA 50524-0025
PO BOX 26, CLARE, IA 50524-0026
PO BOX 27, CLARE, IA 50524-0027
PO BOX 28, CLARE, IA 50524-0028
PO BOX 29, CLARE, IA 50524-0029
PO BOX 30, CLARE, IA 50524-0030
PO BOX 31, CLARE, IA 50524-0031
PO BOX 32, CLARE, IA 50524-0032
PO BOX 33, CLARE, IA 50524-0033
PO BOX 34, CLARE, IA 50524-0034
PO BOX 35, CLARE, IA 50524-0035
PO BOX 36, CLARE, IA 50524-0036
PO BOX 37, CLARE, IA 50524-0037
PO BOX 38, CLARE, IA 50524-0038
PO BOX 39, CLARE, IA 50524-0039
PO BOX 40, CLARE, IA 50524-0040
PO BOX 41, CLARE, IA 50524-0041
PO BOX 42, CLARE, IA 50524-0042
PO BOX 43, CLARE, IA 50524-0043
PO BOX 44, CLARE, IA 50524-0044
PO BOX 45, CLARE, IA 50524-0045
PO BOX 46, CLARE, IA 50524-0046
PO BOX 47, CLARE, IA 50524-0047
PO BOX 48, CLARE, IA 50524-0048
PO BOX 49, CLARE, IA 50524-0049
PO BOX 50, CLARE, IA 50524-0050
PO BOX 51, CLARE, IA 50524-0051
PO BOX 52, CLARE, IA 50524-0052
PO BOX 53, CLARE, IA 50524-0053
PO BOX 54, CLARE, IA 50524-0054
PO BOX 55, CLARE, IA 50524-0055
PO BOX 56, CLARE, IA 50524-0056
PO BOX 57, CLARE, IA 50524-0057
PO BOX 58, CLARE, IA 50524-0058
PO BOX 59, CLARE, IA 50524-0059
PO BOX 60, CLARE, IA 50524-0060
PO BOX 61, CLARE, IA 50524-0061
PO BOX 62, CLARE, IA 50524-0062
PO BOX 63, CLARE, IA 50524-0063
PO BOX 64, CLARE, IA 50524-0064
PO BOX 65, CLARE, IA 50524-0065
PO BOX 66, CLARE, IA 50524-0066
PO BOX 67, CLARE, IA 50524-0067
PO BOX 68, CLARE, IA 50524-0068
PO BOX 69, CLARE, IA 50524-0069
PO BOX 70, CLARE, IA 50524-0070
PO BOX 71, CLARE, IA 50524-0071
PO BOX 72, CLARE, IA 50524-0072
PO BOX 73, CLARE, IA 50524-0073
PO BOX 74, CLARE, IA 50524-0074
PO BOX 75, CLARE, IA 50524-0075
PO BOX 76, CLARE, IA 50524-0076
PO BOX 77, CLARE, IA 50524-0077
PO BOX 78, CLARE, IA 50524-0078
PO BOX 79, CLARE, IA 50524-0079
PO BOX 80, CLARE, IA 50524-0080
PO BOX 81, CLARE, IA 50524-0081
PO BOX 82, CLARE, IA 50524-0082
PO BOX 83, CLARE, IA 50524-0083
PO BOX 84, CLARE, IA 50524-0084
PO BOX 85, CLARE, IA 50524-0085
PO BOX 86, CLARE, IA 50524-0086
PO BOX 87, CLARE, IA 50524-0087
PO BOX 88, CLARE, IA 50524-0088
PO BOX 89, CLARE, IA 50524-0089
PO BOX 90, CLARE, IA 50524-0090
PO BOX 91, CLARE, IA 50524-0091
PO BOX 92, CLARE, IA 50524-0092
PO BOX 93, CLARE, IA 50524-0093
PO BOX 94, CLARE, IA 50524-0094
PO BOX 95, CLARE, IA 50524-0095
PO BOX 96, CLARE, IA 50524-0096
PO BOX 97, CLARE, IA 50524-0097
PO BOX 98, CLARE, IA 50524-0098
PO BOX 99, CLARE, IA 50524-0099
PO BOX 100, CLARE, IA 50524-0100
PO BOX 101, CLARE, IA 50524-0101
PO BOX 102, CLARE, IA 50524-0102
PO BOX 103, CLARE, IA 50524-0103
PO BOX 104, CLARE, IA 50524-0104
PO BOX 105, CLARE, IA 50524-0105
PO BOX 106, CLARE, IA 50524-0106
PO BOX 107, CLARE, IA 50524-0107
PO BOX 108, CLARE, IA 50524-0108
PO BOX 109, CLARE, IA 50524-0109
PO BOX 110, CLARE, IA 50524-0110
PO BOX 111, CLARE, IA 50524-0111
PO BOX 112, CLARE, IA 50524-0112
PO BOX 113, CLARE, IA 50524-0113
PO BOX 114, CLARE, IA 50524-0114
PO BOX 115, CLARE, IA 50524-0115
PO BOX 116, CLARE, IA 50524-0116
PO BOX 117, CLARE, IA 50524-0117
PO BOX 118, CLARE, IA 50524-0118
PO BOX 119, CLARE, IA 50524-0119
PO BOX 120, CLARE, IA 50524-0120
PO BOX 121, CLARE, IA 50524-0121
PO BOX 122, CLARE, IA 50524-0122
PO BOX 123, CLARE, IA 50524-0123
PO BOX 124, CLARE, IA 50524-0124
PO BOX 125, CLARE, IA 50524-0125
PO BOX 126, CLARE, IA 50524-0126
PO BOX 127, CLARE, IA 50524-0127
PO BOX 128, CLARE, IA 50524-0128
PO BOX 129, CLARE, IA 50524-0129
PO BOX 130, CLARE, IA 50524-0130
PO BOX 131, CLARE, IA 50524-0131
PO BOX 132, CLARE, IA 50524-0132
PO BOX 133, CLARE, IA 50524-0133
PO BOX 134, CLARE, IA 50524-0134
PO BOX 135, CLARE, IA 50524-0135
PO BOX 136, CLARE, IA 50524-0136
PO BOX 137, CLARE, IA 50524-0137
PO BOX 138, CLARE, IA 50524-0138
PO BOX 139, CLARE, IA 50524-0139
PO BOX 140, CLARE, IA 50524-0140
PO BOX 141, CLARE, IA 50524-0141
PO BOX 142, CLARE, IA 50524-0142
PO BOX 143, CLARE, IA 50524-0143
PO BOX 144, CLARE, IA 50524-0144
PO BOX 145, CLARE, IA 50524-0145
PO BOX 146, CLARE, IA 50524-0146
PO BOX 147, CLARE, IA 50524-0147
PO BOX 148, CLARE, IA 50524-0148
PO BOX 149, CLARE, IA 50524-0149
PO BOX 150, CLARE, IA 50524-0150
PO BOX 151, CLARE, IA 50524-0151
PO BOX 152, CLARE, IA 50524-0152
PO BOX 153, CLARE, IA 50524-0153
PO BOX 154, CLARE, IA 50524-0154
PO BOX 155, CLARE, IA 50524-0155
PO BOX 156, CLARE, IA 50524-0156
PO BOX 157, CLARE, IA 50524-0157
PO BOX 158, CLARE, IA 50524-0158
PO BOX 159, CLARE, IA 50524-0159
PO BOX 160, CLARE, IA 50524-0160
PO BOX 161, CLARE, IA 50524-0161
PO BOX 162, CLARE, IA 50524-0162
PO BOX 163, CLARE, IA 50524-0163
PO BOX 164, CLARE, IA 50524-0164
PO BOX 165, CLARE, IA 50524-0165
PO BOX 166, CLARE, IA 50524-0166
PO BOX 167, CLARE, IA 50524-0167
PO BOX 168, CLARE, IA 50524-0168
PO BOX 169, CLARE, IA 50524-0169
PO BOX 170, CLARE, IA 50524-0170
PO BOX 171, CLARE, IA 50524-0171
PO BOX 172, CLARE, IA 50524-0172
PO BOX 173, CLARE, IA 50524-0173
PO BOX 174, CLARE, IA 50524-0174
PO BOX 175, CLARE, IA 50524-0175
PO BOX 176, CLARE, IA 50524-0176
PO BOX 177, CLARE, IA 50524-0177
PO BOX 178, CLARE, IA 50524-0178
PO BOX 179, CLARE, IA 50524-0179
PO BOX 180, CLARE, IA 50524-0180
PO BOX 181, CLARE, IA 50524-0181
PO BOX 182, CLARE, IA 50524-0182
PO BOX 183, CLARE, IA 50524-0183
PO BOX 184, CLARE, IA 50524-0184
PO BOX 185, CLARE, IA 50524-0185
PO BOX 186, CLARE, IA 50524-0186
PO BOX 187, CLARE, IA 50524-0187
PO BOX 188, CLARE, IA 50524-0188
PO BOX 189, CLARE, IA 50524-0189
PO BOX 190, CLARE, IA 50524-0190
PO BOX 191, CLARE, IA 50524-0191
PO BOX 192, CLARE, IA 50524-0192
PO BOX 193, CLARE, IA 50524-0193
PO BOX 194, CLARE, IA 50524-0194
PO BOX 195, CLARE, IA 50524-0195
PO BOX 196, CLARE, IA 50524-0196
PO BOX 197, CLARE, IA 50524-0197
PO BOX 198, CLARE, IA 50524-0198
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