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 11, LUXEMBURG, IA 52056-0011
PO BOX 12, LUXEMBURG, IA 52056-0012
PO BOX 13, LUXEMBURG, IA 52056-0013
PO BOX 14, LUXEMBURG, IA 52056-0014
PO BOX 15, LUXEMBURG, IA 52056-0015
PO BOX 16, LUXEMBURG, IA 52056-0016
PO BOX 17, LUXEMBURG, IA 52056-0017
PO BOX 18, LUXEMBURG, IA 52056-0018
PO BOX 19, LUXEMBURG, IA 52056-0019
PO BOX 20, LUXEMBURG, IA 52056-0020
PO BOX 21, LUXEMBURG, IA 52056-0021
PO BOX 22, LUXEMBURG, IA 52056-0022
PO BOX 23, LUXEMBURG, IA 52056-0023
PO BOX 24, LUXEMBURG, IA 52056-0024
PO BOX 25, LUXEMBURG, IA 52056-0025
PO BOX 26, LUXEMBURG, IA 52056-0026
PO BOX 27, LUXEMBURG, IA 52056-0027
PO BOX 28, LUXEMBURG, IA 52056-0028
PO BOX 29, LUXEMBURG, IA 52056-0029
PO BOX 30, LUXEMBURG, IA 52056-0030
PO BOX 31, LUXEMBURG, IA 52056-0031
PO BOX 32, LUXEMBURG, IA 52056-0032
PO BOX 33, LUXEMBURG, IA 52056-0033
PO BOX 34, LUXEMBURG, IA 52056-0034
PO BOX 35, LUXEMBURG, IA 52056-0035
PO BOX 36, LUXEMBURG, IA 52056-0036
PO BOX 37, LUXEMBURG, IA 52056-0037
PO BOX 38, LUXEMBURG, IA 52056-0038
PO BOX 39, LUXEMBURG, IA 52056-0039
PO BOX 40, LUXEMBURG, IA 52056-0040
PO BOX 41, LUXEMBURG, IA 52056-0041
PO BOX 42, LUXEMBURG, IA 52056-0042
PO BOX 43, LUXEMBURG, IA 52056-0043
PO BOX 44, LUXEMBURG, IA 52056-0044
PO BOX 45, LUXEMBURG, IA 52056-0045
PO BOX 46, LUXEMBURG, IA 52056-0046
PO BOX 47, LUXEMBURG, IA 52056-0047
PO BOX 48, LUXEMBURG, IA 52056-0048
PO BOX 49, LUXEMBURG, IA 52056-0049
PO BOX 50, LUXEMBURG, IA 52056-0050
PO BOX 51, LUXEMBURG, IA 52056-0051
PO BOX 52, LUXEMBURG, IA 52056-0052
PO BOX 53, LUXEMBURG, IA 52056-0053
PO BOX 54, LUXEMBURG, IA 52056-0054
PO BOX 55, LUXEMBURG, IA 52056-0055
PO BOX 56, LUXEMBURG, IA 52056-0056
PO BOX 57, LUXEMBURG, IA 52056-0057
PO BOX 58, LUXEMBURG, IA 52056-0058
PO BOX 59, LUXEMBURG, IA 52056-0059
PO BOX 60, LUXEMBURG, IA 52056-0060
PO BOX 61, LUXEMBURG, IA 52056-0061
PO BOX 62, LUXEMBURG, IA 52056-0062
PO BOX 63, LUXEMBURG, IA 52056-0063
PO BOX 64, LUXEMBURG, IA 52056-0064
PO BOX 65, LUXEMBURG, IA 52056-0065
PO BOX 66, LUXEMBURG, IA 52056-0066
PO BOX 67, LUXEMBURG, IA 52056-0067
PO BOX 68, LUXEMBURG, IA 52056-0068
PO BOX 69, LUXEMBURG, IA 52056-0069
PO BOX 70, LUXEMBURG, IA 52056-0070
PO BOX 71, LUXEMBURG, IA 52056-0071
PO BOX 72, LUXEMBURG, IA 52056-0072
PO BOX 73, LUXEMBURG, IA 52056-0073
PO BOX 74, LUXEMBURG, IA 52056-0074
PO BOX 75, LUXEMBURG, IA 52056-0075
PO BOX 76, LUXEMBURG, IA 52056-0076
PO BOX 77, LUXEMBURG, IA 52056-0077
PO BOX 78, LUXEMBURG, IA 52056-0078
PO BOX 79, LUXEMBURG, IA 52056-0079
PO BOX 80, LUXEMBURG, IA 52056-0080
PO BOX 81, LUXEMBURG, IA 52056-0081
PO BOX 82, LUXEMBURG, IA 52056-0082
PO BOX 83, LUXEMBURG, IA 52056-0083
PO BOX 84, LUXEMBURG, IA 52056-0084
PO BOX 85, LUXEMBURG, IA 52056-0085
PO BOX 86, LUXEMBURG, IA 52056-0086
PO BOX 87, LUXEMBURG, IA 52056-0087
PO BOX 88, LUXEMBURG, IA 52056-0088
PO BOX 89, LUXEMBURG, IA 52056-0089
PO BOX 90, LUXEMBURG, IA 52056-0090
PO BOX 91, LUXEMBURG, IA 52056-0091
PO BOX 92, LUXEMBURG, IA 52056-0092
PO BOX 93, LUXEMBURG, IA 52056-0093
PO BOX 94, LUXEMBURG, IA 52056-0094
PO BOX 95, LUXEMBURG, IA 52056-0095
PO BOX 96, LUXEMBURG, IA 52056-0096
PO BOX 97, LUXEMBURG, IA 52056-0097
PO BOX 98, LUXEMBURG, IA 52056-0098
PO BOX 99, LUXEMBURG, IA 52056-0099
PO BOX 100, LUXEMBURG, IA 52056-0100
PO BOX 101, LUXEMBURG, IA 52056-0101
PO BOX 102, LUXEMBURG, IA 52056-0102
PO BOX 103, LUXEMBURG, IA 52056-0103
PO BOX 104, LUXEMBURG, IA 52056-0104
PO BOX 105, LUXEMBURG, IA 52056-0105
PO BOX 106, LUXEMBURG, IA 52056-0106
PO BOX 107, LUXEMBURG, IA 52056-0107
PO BOX 108, LUXEMBURG, IA 52056-0108
PO BOX 109, LUXEMBURG, IA 52056-0109
PO BOX 110, LUXEMBURG, IA 52056-0110
PO BOX 111, LUXEMBURG, IA 52056-0111
PO BOX 112, LUXEMBURG, IA 52056-0112
PO BOX 113, LUXEMBURG, IA 52056-0113
PO BOX 114, LUXEMBURG, IA 52056-0114
PO BOX 115, LUXEMBURG, IA 52056-0115
PO BOX 116, LUXEMBURG, IA 52056-0116
PO BOX 117, LUXEMBURG, IA 52056-0117
PO BOX 118, LUXEMBURG, IA 52056-0118
PO BOX 119, LUXEMBURG, IA 52056-0119
PO BOX 120, LUXEMBURG, IA 52056-0120
PO BOX 121, LUXEMBURG, IA 52056-0121
PO BOX 122, LUXEMBURG, IA 52056-0122
PO BOX 123, LUXEMBURG, IA 52056-0123
PO BOX 124, LUXEMBURG, IA 52056-0124
PO BOX 125, LUXEMBURG, IA 52056-0125
PO BOX 126, LUXEMBURG, IA 52056-0126
PO BOX 127, LUXEMBURG, IA 52056-0127
PO BOX 128, LUXEMBURG, IA 52056-0128
PO BOX 129, LUXEMBURG, IA 52056-0129
PO BOX 130, LUXEMBURG, IA 52056-0130
PO BOX 131, LUXEMBURG, IA 52056-0131
PO BOX 132, LUXEMBURG, IA 52056-0132
PO BOX 133, LUXEMBURG, IA 52056-0133
PO BOX 134, LUXEMBURG, IA 52056-0134
PO BOX 135, LUXEMBURG, IA 52056-0135
PO BOX 136, LUXEMBURG, IA 52056-0136
PO BOX 137, LUXEMBURG, IA 52056-0137
PO BOX 138, LUXEMBURG, IA 52056-0138
PO BOX 139, LUXEMBURG, IA 52056-0139
PO BOX 140, LUXEMBURG, IA 52056-0140
PO BOX 141, LUXEMBURG, IA 52056-0141
PO BOX 142, LUXEMBURG, IA 52056-0142
PO BOX 143, LUXEMBURG, IA 52056-0143
PO BOX 144, LUXEMBURG, IA 52056-0144
PO BOX 145, LUXEMBURG, IA 52056-0145
PO BOX 146, LUXEMBURG, IA 52056-0146
PO BOX 147, LUXEMBURG, IA 52056-0147
PO BOX 148, LUXEMBURG, IA 52056-0148
PO BOX 149, LUXEMBURG, IA 52056-0149
PO BOX 150, LUXEMBURG, IA 52056-0150
PO BOX 151, LUXEMBURG, IA 52056-0151
PO BOX 152, LUXEMBURG, IA 52056-0152
PO BOX 153, LUXEMBURG, IA 52056-0153
PO BOX 154, LUXEMBURG, IA 52056-0154
PO BOX 155, LUXEMBURG, IA 52056-0155
PO BOX 156, LUXEMBURG, IA 52056-0156
PO BOX 157, LUXEMBURG, IA 52056-0157
PO BOX 158, LUXEMBURG, IA 52056-0158
PO BOX 159, LUXEMBURG, IA 52056-0159
PO BOX 160, LUXEMBURG, IA 52056-0160
PO BOX 161, LUXEMBURG, IA 52056-0161
PO BOX 162, LUXEMBURG, IA 52056-0162
PO BOX 163, LUXEMBURG, IA 52056-0163
PO BOX 164, LUXEMBURG, IA 52056-0164
PO BOX 165, LUXEMBURG, IA 52056-0165
PO BOX 166, LUXEMBURG, IA 52056-0166
PO BOX 167, LUXEMBURG, IA 52056-0167
PO BOX 168, LUXEMBURG, IA 52056-0168
PO BOX 169, LUXEMBURG, IA 52056-0169
PO BOX 170, LUXEMBURG, IA 52056-0170
PO BOX 171, LUXEMBURG, IA 52056-0171
PO BOX 172, LUXEMBURG, IA 52056-0172
PO BOX 173, LUXEMBURG, IA 52056-0173
PO BOX 174, LUXEMBURG, IA 52056-0174
PO BOX 175, LUXEMBURG, IA 52056-0175
PO BOX 176, LUXEMBURG, IA 52056-0176
PO BOX 177, LUXEMBURG, IA 52056-0177
PO BOX 178, LUXEMBURG, IA 52056-0178
PO BOX 179, LUXEMBURG, IA 52056-0179
PO BOX 180, LUXEMBURG, IA 52056-0180
PO BOX 181, LUXEMBURG, IA 52056-0181
PO BOX 182, LUXEMBURG, IA 52056-0182
PO BOX 183, LUXEMBURG, IA 52056-0183
PO BOX 184, LUXEMBURG, IA 52056-0184
PO BOX 185, LUXEMBURG, IA 52056-0185
PO BOX 186, LUXEMBURG, IA 52056-0186
PO BOX 187, LUXEMBURG, IA 52056-0187
PO BOX 188, LUXEMBURG, IA 52056-0188
PO BOX 189, LUXEMBURG, IA 52056-0189
PO BOX 190, LUXEMBURG, IA 52056-0190
PO BOX 191, LUXEMBURG, IA 52056-0191
PO BOX 192, LUXEMBURG, IA 52056-0192
PO BOX 193, LUXEMBURG, IA 52056-0193
PO BOX 194, LUXEMBURG, IA 52056-0194
PO BOX 195, LUXEMBURG, IA 52056-0195
PO BOX 196, LUXEMBURG, IA 52056-0196
PO BOX 197, LUXEMBURG, IA 52056-0197
PO BOX 198, LUXEMBURG, IA 52056-0198
PO BOX 199, LUXEMBURG, IA 52056-0199
PO BOX 200, LUXEMBURG, IA 52056-0200
PO BOX 201, LUXEMBURG, IA 52056-0201
PO BOX 202, LUXEMBURG, IA 52056-0202
PO BOX 203, LUXEMBURG, IA 52056-0203
PO BOX 204, LUXEMBURG, IA 52056-0204
PO BOX 205, LUXEMBURG, IA 52056-0205
PO BOX 206, LUXEMBURG, IA 52056-0206
PO BOX 207, LUXEMBURG, IA 52056-0207
PO BOX 208, LUXEMBURG, IA 52056-0208
PO BOX 209, LUXEMBURG, IA 52056-0209
PO BOX 210, LUXEMBURG, IA 52056-0210
PO BOX 211, LUXEMBURG, IA 52056-0211
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