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, COLESBURG, IA 52035-0001
PO BOX 2, COLESBURG, IA 52035-0002
PO BOX 3, COLESBURG, IA 52035-0003
PO BOX 4, COLESBURG, IA 52035-0004
PO BOX 5, COLESBURG, IA 52035-0005
PO BOX 6, COLESBURG, IA 52035-0006
PO BOX 7, COLESBURG, IA 52035-0007
PO BOX 8, COLESBURG, IA 52035-0008
PO BOX 9, COLESBURG, IA 52035-0009
PO BOX 10, COLESBURG, IA 52035-0010
PO BOX 11, COLESBURG, IA 52035-0011
PO BOX 12, COLESBURG, IA 52035-0012
PO BOX 13, COLESBURG, IA 52035-0013
PO BOX 14, COLESBURG, IA 52035-0014
PO BOX 15, COLESBURG, IA 52035-0015
PO BOX 16, COLESBURG, IA 52035-0016
PO BOX 17, COLESBURG, IA 52035-0017
PO BOX 18, COLESBURG, IA 52035-0018
PO BOX 19, COLESBURG, IA 52035-0019
PO BOX 20, COLESBURG, IA 52035-0020
PO BOX 21, COLESBURG, IA 52035-0021
PO BOX 22, COLESBURG, IA 52035-0022
PO BOX 23, COLESBURG, IA 52035-0023
PO BOX 24, COLESBURG, IA 52035-0024
PO BOX 25, COLESBURG, IA 52035-0025
PO BOX 26, COLESBURG, IA 52035-0026
PO BOX 27, COLESBURG, IA 52035-0027
PO BOX 28, COLESBURG, IA 52035-0028
PO BOX 29, COLESBURG, IA 52035-0029
PO BOX 30, COLESBURG, IA 52035-0030
PO BOX 31, COLESBURG, IA 52035-0031
PO BOX 32, COLESBURG, IA 52035-0032
PO BOX 33, COLESBURG, IA 52035-0033
PO BOX 34, COLESBURG, IA 52035-0034
PO BOX 35, COLESBURG, IA 52035-0035
PO BOX 36, COLESBURG, IA 52035-0036
PO BOX 37, COLESBURG, IA 52035-0037
PO BOX 38, COLESBURG, IA 52035-0038
PO BOX 39, COLESBURG, IA 52035-0039
PO BOX 40, COLESBURG, IA 52035-0040
PO BOX 41, COLESBURG, IA 52035-0041
PO BOX 42, COLESBURG, IA 52035-0042
PO BOX 43, COLESBURG, IA 52035-0043
PO BOX 44, COLESBURG, IA 52035-0044
PO BOX 45, COLESBURG, IA 52035-0045
PO BOX 46, COLESBURG, IA 52035-0046
PO BOX 47, COLESBURG, IA 52035-0047
PO BOX 48, COLESBURG, IA 52035-0048
PO BOX 49, COLESBURG, IA 52035-0049
PO BOX 50, COLESBURG, IA 52035-0050
PO BOX 51, COLESBURG, IA 52035-0051
PO BOX 52, COLESBURG, IA 52035-0052
PO BOX 53, COLESBURG, IA 52035-0053
PO BOX 54, COLESBURG, IA 52035-0054
PO BOX 55, COLESBURG, IA 52035-0055
PO BOX 56, COLESBURG, IA 52035-0056
PO BOX 57, COLESBURG, IA 52035-0057
PO BOX 58, COLESBURG, IA 52035-0058
PO BOX 59, COLESBURG, IA 52035-0059
PO BOX 60, COLESBURG, IA 52035-0060
PO BOX 61, COLESBURG, IA 52035-0061
PO BOX 62, COLESBURG, IA 52035-0062
PO BOX 63, COLESBURG, IA 52035-0063
PO BOX 64, COLESBURG, IA 52035-0064
PO BOX 65, COLESBURG, IA 52035-0065
PO BOX 66, COLESBURG, IA 52035-0066
PO BOX 67, COLESBURG, IA 52035-0067
PO BOX 68, COLESBURG, IA 52035-0068
PO BOX 69, COLESBURG, IA 52035-0069
PO BOX 70, COLESBURG, IA 52035-0070
PO BOX 71, COLESBURG, IA 52035-0071
PO BOX 72, COLESBURG, IA 52035-0072
PO BOX 73, COLESBURG, IA 52035-0073
PO BOX 74, COLESBURG, IA 52035-0074
PO BOX 75, COLESBURG, IA 52035-0075
PO BOX 76, COLESBURG, IA 52035-0076
PO BOX 77, COLESBURG, IA 52035-0077
PO BOX 78, COLESBURG, IA 52035-0078
PO BOX 79, COLESBURG, IA 52035-0079
PO BOX 80, COLESBURG, IA 52035-0080
PO BOX 81, COLESBURG, IA 52035-0081
PO BOX 82, COLESBURG, IA 52035-0082
PO BOX 83, COLESBURG, IA 52035-0083
PO BOX 84, COLESBURG, IA 52035-0084
PO BOX 85, COLESBURG, IA 52035-0085
PO BOX 86, COLESBURG, IA 52035-0086
PO BOX 87, COLESBURG, IA 52035-0087
PO BOX 88, COLESBURG, IA 52035-0088
PO BOX 89, COLESBURG, IA 52035-0089
PO BOX 90, COLESBURG, IA 52035-0090
PO BOX 91, COLESBURG, IA 52035-0091
PO BOX 92, COLESBURG, IA 52035-0092
PO BOX 93, COLESBURG, IA 52035-0093
PO BOX 94, COLESBURG, IA 52035-0094
PO BOX 95, COLESBURG, IA 52035-0095
PO BOX 96, COLESBURG, IA 52035-0096
PO BOX 97, COLESBURG, IA 52035-0097
PO BOX 98, COLESBURG, IA 52035-0098
PO BOX 99, COLESBURG, IA 52035-0099
PO BOX 100, COLESBURG, IA 52035-0100
PO BOX 101, COLESBURG, IA 52035-0101
PO BOX 102, COLESBURG, IA 52035-0102
PO BOX 103, COLESBURG, IA 52035-0103
PO BOX 104, COLESBURG, IA 52035-0104
PO BOX 105, COLESBURG, IA 52035-0105
PO BOX 106, COLESBURG, IA 52035-0106
PO BOX 107, COLESBURG, IA 52035-0107
PO BOX 108, COLESBURG, IA 52035-0108
PO BOX 109, COLESBURG, IA 52035-0109
PO BOX 110, COLESBURG, IA 52035-0110
PO BOX 111, COLESBURG, IA 52035-0111
PO BOX 112, COLESBURG, IA 52035-0112
PO BOX 113, COLESBURG, IA 52035-0113
PO BOX 114, COLESBURG, IA 52035-0114
PO BOX 115, COLESBURG, IA 52035-0115
PO BOX 116, COLESBURG, IA 52035-0116
PO BOX 117, COLESBURG, IA 52035-0117
PO BOX 118, COLESBURG, IA 52035-0118
PO BOX 119, COLESBURG, IA 52035-0119
PO BOX 120, COLESBURG, IA 52035-0120
PO BOX 121, COLESBURG, IA 52035-0121
PO BOX 122, COLESBURG, IA 52035-0122
PO BOX 123, COLESBURG, IA 52035-0123
PO BOX 124, COLESBURG, IA 52035-0124
PO BOX 125, COLESBURG, IA 52035-0125
PO BOX 126, COLESBURG, IA 52035-0126
PO BOX 127, COLESBURG, IA 52035-0127
PO BOX 128, COLESBURG, IA 52035-0128
PO BOX 129, COLESBURG, IA 52035-0129
PO BOX 130, COLESBURG, IA 52035-0130
PO BOX 131, COLESBURG, IA 52035-0131
PO BOX 132, COLESBURG, IA 52035-0132
PO BOX 133, COLESBURG, IA 52035-0133
PO BOX 134, COLESBURG, IA 52035-0134
PO BOX 135, COLESBURG, IA 52035-0135
PO BOX 136, COLESBURG, IA 52035-0136
PO BOX 137, COLESBURG, IA 52035-0137
PO BOX 138, COLESBURG, IA 52035-0138
PO BOX 139, COLESBURG, IA 52035-0139
PO BOX 140, COLESBURG, IA 52035-0140
PO BOX 141, COLESBURG, IA 52035-0141
PO BOX 142, COLESBURG, IA 52035-0142
PO BOX 143, COLESBURG, IA 52035-0143
PO BOX 144, COLESBURG, IA 52035-0144
PO BOX 145, COLESBURG, IA 52035-0145
PO BOX 146, COLESBURG, IA 52035-0146
PO BOX 147, COLESBURG, IA 52035-0147
PO BOX 148, COLESBURG, IA 52035-0148
PO BOX 149, COLESBURG, IA 52035-0149
PO BOX 150, COLESBURG, IA 52035-0150
PO BOX 151, COLESBURG, IA 52035-0151
PO BOX 152, COLESBURG, IA 52035-0152
PO BOX 153, COLESBURG, IA 52035-0153
PO BOX 154, COLESBURG, IA 52035-0154
PO BOX 155, COLESBURG, IA 52035-0155
PO BOX 156, COLESBURG, IA 52035-0156
PO BOX 157, COLESBURG, IA 52035-0157
PO BOX 158, COLESBURG, IA 52035-0158
PO BOX 159, COLESBURG, IA 52035-0159
PO BOX 160, COLESBURG, IA 52035-0160
PO BOX 161, COLESBURG, IA 52035-0161
PO BOX 162, COLESBURG, IA 52035-0162
PO BOX 163, COLESBURG, IA 52035-0163
PO BOX 164, COLESBURG, IA 52035-0164
PO BOX 165, COLESBURG, IA 52035-0165
PO BOX 166, COLESBURG, IA 52035-0166
PO BOX 167, COLESBURG, IA 52035-0167
PO BOX 168, COLESBURG, IA 52035-0168
PO BOX 169, COLESBURG, IA 52035-0169
PO BOX 170, COLESBURG, IA 52035-0170
PO BOX 171, COLESBURG, IA 52035-0171
PO BOX 172, COLESBURG, IA 52035-0172
PO BOX 173, COLESBURG, IA 52035-0173
PO BOX 174, COLESBURG, IA 52035-0174
PO BOX 175, COLESBURG, IA 52035-0175
PO BOX 176, COLESBURG, IA 52035-0176
PO BOX 177, COLESBURG, IA 52035-0177
PO BOX 178, COLESBURG, IA 52035-0178
PO BOX 179, COLESBURG, IA 52035-0179
PO BOX 180, COLESBURG, IA 52035-0180
PO BOX 181, COLESBURG, IA 52035-0181
PO BOX 182, COLESBURG, IA 52035-0182
PO BOX 183, COLESBURG, IA 52035-0183
PO BOX 184, COLESBURG, IA 52035-0184
PO BOX 185, COLESBURG, IA 52035-0185
PO BOX 186, COLESBURG, IA 52035-0186
PO BOX 187, COLESBURG, IA 52035-0187
PO BOX 188, COLESBURG, IA 52035-0188
PO BOX 189, COLESBURG, IA 52035-0189
PO BOX 190, COLESBURG, IA 52035-0190
PO BOX 191, COLESBURG, IA 52035-0191
PO BOX 192, COLESBURG, IA 52035-0192
PO BOX 193, COLESBURG, IA 52035-0193
PO BOX 194, COLESBURG, IA 52035-0194
PO BOX 195, COLESBURG, IA 52035-0195
PO BOX 196, COLESBURG, IA 52035-0196
PO BOX 197, COLESBURG, IA 52035-0197
PO BOX 198, COLESBURG, IA 52035-0198
PO BOX 199, COLESBURG, IA 52035-0199
PO BOX 200, COLESBURG, IA 52035-0200
PO BOX 201, COLESBURG, IA 52035-0201
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