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, LE GRAND, IA 50142-0001
PO BOX 2, LE GRAND, IA 50142-0002
PO BOX 3, LE GRAND, IA 50142-0003
PO BOX 4, LE GRAND, IA 50142-0004
PO BOX 5, LE GRAND, IA 50142-0005
PO BOX 6, LE GRAND, IA 50142-0006
PO BOX 7, LE GRAND, IA 50142-0007
PO BOX 8, LE GRAND, IA 50142-0008
PO BOX 9, LE GRAND, IA 50142-0009
PO BOX 10, LE GRAND, IA 50142-0010
PO BOX 11, LE GRAND, IA 50142-0011
PO BOX 12, LE GRAND, IA 50142-0012
PO BOX 13, LE GRAND, IA 50142-0013
PO BOX 14, LE GRAND, IA 50142-0014
PO BOX 15, LE GRAND, IA 50142-0015
PO BOX 16, LE GRAND, IA 50142-0016
PO BOX 17, LE GRAND, IA 50142-0017
PO BOX 18, LE GRAND, IA 50142-0018
PO BOX 19, LE GRAND, IA 50142-0019
PO BOX 20, LE GRAND, IA 50142-0020
PO BOX 21, LE GRAND, IA 50142-0021
PO BOX 22, LE GRAND, IA 50142-0022
PO BOX 23, LE GRAND, IA 50142-0023
PO BOX 24, LE GRAND, IA 50142-0024
PO BOX 25, LE GRAND, IA 50142-0025
PO BOX 26, LE GRAND, IA 50142-0026
PO BOX 27, LE GRAND, IA 50142-0027
PO BOX 28, LE GRAND, IA 50142-0028
PO BOX 29, LE GRAND, IA 50142-0029
PO BOX 30, LE GRAND, IA 50142-0030
PO BOX 31, LE GRAND, IA 50142-0031
PO BOX 32, LE GRAND, IA 50142-0032
PO BOX 33, LE GRAND, IA 50142-0033
PO BOX 34, LE GRAND, IA 50142-0034
PO BOX 35, LE GRAND, IA 50142-0035
PO BOX 36, LE GRAND, IA 50142-0036
PO BOX 37, LE GRAND, IA 50142-0037
PO BOX 38, LE GRAND, IA 50142-0038
PO BOX 39, LE GRAND, IA 50142-0039
PO BOX 40, LE GRAND, IA 50142-0040
PO BOX 41, LE GRAND, IA 50142-0041
PO BOX 42, LE GRAND, IA 50142-0042
PO BOX 43, LE GRAND, IA 50142-0043
PO BOX 44, LE GRAND, IA 50142-0044
PO BOX 45, LE GRAND, IA 50142-0045
PO BOX 46, LE GRAND, IA 50142-0046
PO BOX 47, LE GRAND, IA 50142-0047
PO BOX 48, LE GRAND, IA 50142-0048
PO BOX 49, LE GRAND, IA 50142-0049
PO BOX 50, LE GRAND, IA 50142-0050
PO BOX 51, LE GRAND, IA 50142-0051
PO BOX 52, LE GRAND, IA 50142-0052
PO BOX 53, LE GRAND, IA 50142-0053
PO BOX 54, LE GRAND, IA 50142-0054
PO BOX 55, LE GRAND, IA 50142-0055
PO BOX 56, LE GRAND, IA 50142-0056
PO BOX 57, LE GRAND, IA 50142-0057
PO BOX 58, LE GRAND, IA 50142-0058
PO BOX 59, LE GRAND, IA 50142-0059
PO BOX 60, LE GRAND, IA 50142-0060
PO BOX 61, LE GRAND, IA 50142-0061
PO BOX 62, LE GRAND, IA 50142-0062
PO BOX 63, LE GRAND, IA 50142-0063
PO BOX 64, LE GRAND, IA 50142-0064
PO BOX 65, LE GRAND, IA 50142-0065
PO BOX 66, LE GRAND, IA 50142-0066
PO BOX 67, LE GRAND, IA 50142-0067
PO BOX 68, LE GRAND, IA 50142-0068
PO BOX 69, LE GRAND, IA 50142-0069
PO BOX 70, LE GRAND, IA 50142-0070
PO BOX 71, LE GRAND, IA 50142-0071
PO BOX 72, LE GRAND, IA 50142-0072
PO BOX 73, LE GRAND, IA 50142-0073
PO BOX 74, LE GRAND, IA 50142-0074
PO BOX 75, LE GRAND, IA 50142-0075
PO BOX 76, LE GRAND, IA 50142-0076
PO BOX 77, LE GRAND, IA 50142-0077
PO BOX 78, LE GRAND, IA 50142-0078
PO BOX 79, LE GRAND, IA 50142-0079
PO BOX 80, LE GRAND, IA 50142-0080
PO BOX 81, LE GRAND, IA 50142-0081
PO BOX 82, LE GRAND, IA 50142-0082
PO BOX 83, LE GRAND, IA 50142-0083
PO BOX 84, LE GRAND, IA 50142-0084
PO BOX 85, LE GRAND, IA 50142-0085
PO BOX 86, LE GRAND, IA 50142-0086
PO BOX 87, LE GRAND, IA 50142-0087
PO BOX 88, LE GRAND, IA 50142-0088
PO BOX 89, LE GRAND, IA 50142-0089
PO BOX 90, LE GRAND, IA 50142-0090
PO BOX 91, LE GRAND, IA 50142-0091
PO BOX 92, LE GRAND, IA 50142-0092
PO BOX 93, LE GRAND, IA 50142-0093
PO BOX 94, LE GRAND, IA 50142-0094
PO BOX 95, LE GRAND, IA 50142-0095
PO BOX 96, LE GRAND, IA 50142-0096
PO BOX 97, LE GRAND, IA 50142-0097
PO BOX 98, LE GRAND, IA 50142-0098
PO BOX 99, LE GRAND, IA 50142-0099
PO BOX 100, LE GRAND, IA 50142-0100
PO BOX 101, LE GRAND, IA 50142-0101
PO BOX 102, LE GRAND, IA 50142-0102
PO BOX 103, LE GRAND, IA 50142-0103
PO BOX 104, LE GRAND, IA 50142-0104
PO BOX 105, LE GRAND, IA 50142-0105
PO BOX 106, LE GRAND, IA 50142-0106
PO BOX 107, LE GRAND, IA 50142-0107
PO BOX 108, LE GRAND, IA 50142-0108
PO BOX 109, LE GRAND, IA 50142-0109
PO BOX 110, LE GRAND, IA 50142-0110
PO BOX 111, LE GRAND, IA 50142-0111
PO BOX 112, LE GRAND, IA 50142-0112
PO BOX 113, LE GRAND, IA 50142-0113
PO BOX 114, LE GRAND, IA 50142-0114
PO BOX 115, LE GRAND, IA 50142-0115
PO BOX 116, LE GRAND, IA 50142-0116
PO BOX 117, LE GRAND, IA 50142-0117
PO BOX 118, LE GRAND, IA 50142-0118
PO BOX 119, LE GRAND, IA 50142-0119
PO BOX 120, LE GRAND, IA 50142-0120
PO BOX 121, LE GRAND, IA 50142-0121
PO BOX 122, LE GRAND, IA 50142-0122
PO BOX 123, LE GRAND, IA 50142-0123
PO BOX 124, LE GRAND, IA 50142-0124
PO BOX 125, LE GRAND, IA 50142-0125
PO BOX 126, LE GRAND, IA 50142-0126
PO BOX 127, LE GRAND, IA 50142-0127
PO BOX 128, LE GRAND, IA 50142-0128
PO BOX 129, LE GRAND, IA 50142-0129
PO BOX 130, LE GRAND, IA 50142-0130
PO BOX 131, LE GRAND, IA 50142-0131
PO BOX 132, LE GRAND, IA 50142-0132
PO BOX 133, LE GRAND, IA 50142-0133
PO BOX 134, LE GRAND, IA 50142-0134
PO BOX 135, LE GRAND, IA 50142-0135
PO BOX 136, LE GRAND, IA 50142-0136
PO BOX 137, LE GRAND, IA 50142-0137
PO BOX 138, LE GRAND, IA 50142-0138
PO BOX 139, LE GRAND, IA 50142-0139
PO BOX 140, LE GRAND, IA 50142-0140
PO BOX 141, LE GRAND, IA 50142-0141
PO BOX 142, LE GRAND, IA 50142-0142
PO BOX 143, LE GRAND, IA 50142-0143
PO BOX 144, LE GRAND, IA 50142-0144
PO BOX 145, LE GRAND, IA 50142-0145
PO BOX 146, LE GRAND, IA 50142-0146
PO BOX 147, LE GRAND, IA 50142-0147
PO BOX 148, LE GRAND, IA 50142-0148
PO BOX 149, LE GRAND, IA 50142-0149
PO BOX 150, LE GRAND, IA 50142-0150
PO BOX 151, LE GRAND, IA 50142-0151
PO BOX 152, LE GRAND, IA 50142-0152
PO BOX 153, LE GRAND, IA 50142-0153
PO BOX 154, LE GRAND, IA 50142-0154
PO BOX 155, LE GRAND, IA 50142-0155
PO BOX 156, LE GRAND, IA 50142-0156
PO BOX 157, LE GRAND, IA 50142-0157
PO BOX 158, LE GRAND, IA 50142-0158
PO BOX 159, LE GRAND, IA 50142-0159
PO BOX 160, LE GRAND, IA 50142-0160
PO BOX 161, LE GRAND, IA 50142-0161
PO BOX 162, LE GRAND, IA 50142-0162
PO BOX 163, LE GRAND, IA 50142-0163
PO BOX 164, LE GRAND, IA 50142-0164
PO BOX 165, LE GRAND, IA 50142-0165
PO BOX 166, LE GRAND, IA 50142-0166
PO BOX 167, LE GRAND, IA 50142-0167
PO BOX 168, LE GRAND, IA 50142-0168
PO BOX 169, LE GRAND, IA 50142-0169
PO BOX 170, LE GRAND, IA 50142-0170
PO BOX 171, LE GRAND, IA 50142-0171
PO BOX 172, LE GRAND, IA 50142-0172
PO BOX 173, LE GRAND, IA 50142-0173
PO BOX 174, LE GRAND, IA 50142-0174
PO BOX 175, LE GRAND, IA 50142-0175
PO BOX 176, LE GRAND, IA 50142-0176
PO BOX 177, LE GRAND, IA 50142-0177
PO BOX 178, LE GRAND, IA 50142-0178
PO BOX 179, LE GRAND, IA 50142-0179
PO BOX 180, LE GRAND, IA 50142-0180
PO BOX 181, LE GRAND, IA 50142-0181
PO BOX 182, LE GRAND, IA 50142-0182
PO BOX 183, LE GRAND, IA 50142-0183
PO BOX 184, LE GRAND, IA 50142-0184
PO BOX 185, LE GRAND, IA 50142-0185
PO BOX 186, LE GRAND, IA 50142-0186
PO BOX 187, LE GRAND, IA 50142-0187
PO BOX 188, LE GRAND, IA 50142-0188
PO BOX 189, LE GRAND, IA 50142-0189
PO BOX 190, LE GRAND, IA 50142-0190
PO BOX 191, LE GRAND, IA 50142-0191
PO BOX 192, LE GRAND, IA 50142-0192
PO BOX 193, LE GRAND, IA 50142-0193
PO BOX 194, LE GRAND, IA 50142-0194
PO BOX 195, LE GRAND, IA 50142-0195
PO BOX 196, LE GRAND, IA 50142-0196
PO BOX 197, LE GRAND, IA 50142-0197
PO BOX 198, LE GRAND, IA 50142-0198
PO BOX 199, LE GRAND, IA 50142-0199
PO BOX 200, LE GRAND, IA 50142-0200
PO BOX 201, LE GRAND, IA 50142-0201
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