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, MANSON, IA 50563-0001
PO BOX 2, MANSON, IA 50563-0002
PO BOX 3, MANSON, IA 50563-0003
PO BOX 4, MANSON, IA 50563-0004
PO BOX 5, MANSON, IA 50563-0005
PO BOX 6, MANSON, IA 50563-0006
PO BOX 7, MANSON, IA 50563-0007
PO BOX 8, MANSON, IA 50563-0008
PO BOX 9, MANSON, IA 50563-0009
PO BOX 10, MANSON, IA 50563-0010
PO BOX 11, MANSON, IA 50563-0011
PO BOX 12, MANSON, IA 50563-0012
PO BOX 13, MANSON, IA 50563-0013
PO BOX 14, MANSON, IA 50563-0014
PO BOX 15, MANSON, IA 50563-0015
PO BOX 16, MANSON, IA 50563-0016
PO BOX 17, MANSON, IA 50563-0017
PO BOX 18, MANSON, IA 50563-0018
PO BOX 19, MANSON, IA 50563-0019
PO BOX 20, MANSON, IA 50563-0020
PO BOX 21, MANSON, IA 50563-0021
PO BOX 22, MANSON, IA 50563-0022
PO BOX 23, MANSON, IA 50563-0023
PO BOX 24, MANSON, IA 50563-0024
PO BOX 25, MANSON, IA 50563-0025
PO BOX 26, MANSON, IA 50563-0026
PO BOX 27, MANSON, IA 50563-0027
PO BOX 28, MANSON, IA 50563-0028
PO BOX 29, MANSON, IA 50563-0029
PO BOX 30, MANSON, IA 50563-0030
PO BOX 31, MANSON, IA 50563-0031
PO BOX 32, MANSON, IA 50563-0032
PO BOX 33, MANSON, IA 50563-0033
PO BOX 34, MANSON, IA 50563-0034
PO BOX 35, MANSON, IA 50563-0035
PO BOX 36, MANSON, IA 50563-0036
PO BOX 37, MANSON, IA 50563-0037
PO BOX 38, MANSON, IA 50563-0038
PO BOX 39, MANSON, IA 50563-0039
PO BOX 40, MANSON, IA 50563-0040
PO BOX 41, MANSON, IA 50563-0041
PO BOX 42, MANSON, IA 50563-0042
PO BOX 43, MANSON, IA 50563-0043
PO BOX 44, MANSON, IA 50563-0044
PO BOX 45, MANSON, IA 50563-0045
PO BOX 46, MANSON, IA 50563-0046
PO BOX 47, MANSON, IA 50563-0047
PO BOX 48, MANSON, IA 50563-0048
PO BOX 49, MANSON, IA 50563-0049
PO BOX 50, MANSON, IA 50563-0050
PO BOX 51, MANSON, IA 50563-0051
PO BOX 52, MANSON, IA 50563-0052
PO BOX 53, MANSON, IA 50563-0053
PO BOX 54, MANSON, IA 50563-0054
PO BOX 55, MANSON, IA 50563-0055
PO BOX 56, MANSON, IA 50563-0056
PO BOX 57, MANSON, IA 50563-0057
PO BOX 58, MANSON, IA 50563-0058
PO BOX 59, MANSON, IA 50563-0059
PO BOX 60, MANSON, IA 50563-0060
PO BOX 61, MANSON, IA 50563-0061
PO BOX 62, MANSON, IA 50563-0062
PO BOX 63, MANSON, IA 50563-0063
PO BOX 64, MANSON, IA 50563-0064
PO BOX 65, MANSON, IA 50563-0065
PO BOX 66, MANSON, IA 50563-0066
PO BOX 67, MANSON, IA 50563-0067
PO BOX 68, MANSON, IA 50563-0068
PO BOX 69, MANSON, IA 50563-0069
PO BOX 70, MANSON, IA 50563-0070
PO BOX 71, MANSON, IA 50563-0071
PO BOX 72, MANSON, IA 50563-0072
PO BOX 73, MANSON, IA 50563-0073
PO BOX 74, MANSON, IA 50563-0074
PO BOX 75, MANSON, IA 50563-0075
PO BOX 76, MANSON, IA 50563-0076
PO BOX 77, MANSON, IA 50563-0077
PO BOX 78, MANSON, IA 50563-0078
PO BOX 79, MANSON, IA 50563-0079
PO BOX 80, MANSON, IA 50563-0080
PO BOX 81, MANSON, IA 50563-0081
PO BOX 82, MANSON, IA 50563-0082
PO BOX 83, MANSON, IA 50563-0083
PO BOX 84, MANSON, IA 50563-0084
PO BOX 85, MANSON, IA 50563-0085
PO BOX 86, MANSON, IA 50563-0086
PO BOX 87, MANSON, IA 50563-0087
PO BOX 88, MANSON, IA 50563-0088
PO BOX 89, MANSON, IA 50563-0089
PO BOX 90, MANSON, IA 50563-0090
PO BOX 91, MANSON, IA 50563-0091
PO BOX 92, MANSON, IA 50563-0092
PO BOX 93, MANSON, IA 50563-0093
PO BOX 94, MANSON, IA 50563-0094
PO BOX 95, MANSON, IA 50563-0095
PO BOX 96, MANSON, IA 50563-0096
PO BOX 97, MANSON, IA 50563-0097
PO BOX 98, MANSON, IA 50563-0098
PO BOX 99, MANSON, IA 50563-0099
PO BOX 100, MANSON, IA 50563-0100
PO BOX 101, MANSON, IA 50563-0101
PO BOX 102, MANSON, IA 50563-0102
PO BOX 103, MANSON, IA 50563-0103
PO BOX 104, MANSON, IA 50563-0104
PO BOX 105, MANSON, IA 50563-0105
PO BOX 106, MANSON, IA 50563-0106
PO BOX 107, MANSON, IA 50563-0107
PO BOX 108, MANSON, IA 50563-0108
PO BOX 109, MANSON, IA 50563-0109
PO BOX 110, MANSON, IA 50563-0110
PO BOX 111, MANSON, IA 50563-0111
PO BOX 112, MANSON, IA 50563-0112
PO BOX 113, MANSON, IA 50563-0113
PO BOX 114, MANSON, IA 50563-0114
PO BOX 115, MANSON, IA 50563-0115
PO BOX 116, MANSON, IA 50563-0116
PO BOX 117, MANSON, IA 50563-0117
PO BOX 118, MANSON, IA 50563-0118
PO BOX 119, MANSON, IA 50563-0119
PO BOX 120, MANSON, IA 50563-0120
PO BOX 121, MANSON, IA 50563-0121
PO BOX 122, MANSON, IA 50563-0122
PO BOX 123, MANSON, IA 50563-0123
PO BOX 124, MANSON, IA 50563-0124
PO BOX 125, MANSON, IA 50563-0125
PO BOX 126, MANSON, IA 50563-0126
PO BOX 127, MANSON, IA 50563-0127
PO BOX 128, MANSON, IA 50563-0128
PO BOX 129, MANSON, IA 50563-0129
PO BOX 130, MANSON, IA 50563-0130
PO BOX 131, MANSON, IA 50563-0131
PO BOX 132, MANSON, IA 50563-0132
PO BOX 133, MANSON, IA 50563-0133
PO BOX 134, MANSON, IA 50563-0134
PO BOX 135, MANSON, IA 50563-0135
PO BOX 136, MANSON, IA 50563-0136
PO BOX 137, MANSON, IA 50563-0137
PO BOX 138, MANSON, IA 50563-0138
PO BOX 139, MANSON, IA 50563-0139
PO BOX 140, MANSON, IA 50563-0140
PO BOX 141, MANSON, IA 50563-0141
PO BOX 142, MANSON, IA 50563-0142
PO BOX 143, MANSON, IA 50563-0143
PO BOX 144, MANSON, IA 50563-0144
PO BOX 145, MANSON, IA 50563-0145
PO BOX 146, MANSON, IA 50563-0146
PO BOX 147, MANSON, IA 50563-0147
PO BOX 148, MANSON, IA 50563-0148
PO BOX 149, MANSON, IA 50563-0149
PO BOX 150, MANSON, IA 50563-0150
PO BOX 151, MANSON, IA 50563-0151
PO BOX 152, MANSON, IA 50563-0152
PO BOX 153, MANSON, IA 50563-0153
PO BOX 154, MANSON, IA 50563-0154
PO BOX 155, MANSON, IA 50563-0155
PO BOX 156, MANSON, IA 50563-0156
PO BOX 157, MANSON, IA 50563-0157
PO BOX 158, MANSON, IA 50563-0158
PO BOX 159, MANSON, IA 50563-0159
PO BOX 160, MANSON, IA 50563-0160
PO BOX 161, MANSON, IA 50563-0161
PO BOX 162, MANSON, IA 50563-0162
PO BOX 163, MANSON, IA 50563-0163
PO BOX 164, MANSON, IA 50563-0164
PO BOX 165, MANSON, IA 50563-0165
PO BOX 166, MANSON, IA 50563-0166
PO BOX 167, MANSON, IA 50563-0167
PO BOX 168, MANSON, IA 50563-0168
PO BOX 169, MANSON, IA 50563-0169
PO BOX 170, MANSON, IA 50563-0170
PO BOX 171, MANSON, IA 50563-0171
PO BOX 172, MANSON, IA 50563-0172
PO BOX 173, MANSON, IA 50563-0173
PO BOX 174, MANSON, IA 50563-0174
PO BOX 175, MANSON, IA 50563-0175
PO BOX 176, MANSON, IA 50563-0176
PO BOX 177, MANSON, IA 50563-0177
PO BOX 178, MANSON, IA 50563-0178
PO BOX 179, MANSON, IA 50563-0179
PO BOX 180, MANSON, IA 50563-0180
PO BOX 181, MANSON, IA 50563-0181
PO BOX 182, MANSON, IA 50563-0182
PO BOX 183, MANSON, IA 50563-0183
PO BOX 184, MANSON, IA 50563-0184
PO BOX 185, MANSON, IA 50563-0185
PO BOX 186, MANSON, IA 50563-0186
PO BOX 187, MANSON, IA 50563-0187
PO BOX 188, MANSON, IA 50563-0188
PO BOX 189, MANSON, IA 50563-0189
PO BOX 190, MANSON, IA 50563-0190
PO BOX 191, MANSON, IA 50563-0191
PO BOX 192, MANSON, IA 50563-0192
PO BOX 193, MANSON, IA 50563-0193
PO BOX 194, MANSON, IA 50563-0194
PO BOX 195, MANSON, IA 50563-0195
PO BOX 196, MANSON, IA 50563-0196
PO BOX 197, MANSON, IA 50563-0197
PO BOX 198, MANSON, IA 50563-0198
PO BOX 199, MANSON, IA 50563-0199
PO BOX 200, MANSON, IA 50563-0200
PO BOX 201, MANSON, IA 50563-0201
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