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, KINGSLEY, IA 51028-0001
PO BOX 2, KINGSLEY, IA 51028-0002
PO BOX 3, KINGSLEY, IA 51028-0003
PO BOX 4, KINGSLEY, IA 51028-0004
PO BOX 5, KINGSLEY, IA 51028-0005
PO BOX 6, KINGSLEY, IA 51028-0006
PO BOX 7, KINGSLEY, IA 51028-0007
PO BOX 8, KINGSLEY, IA 51028-0008
PO BOX 9, KINGSLEY, IA 51028-0009
PO BOX 10, KINGSLEY, IA 51028-0010
PO BOX 11, KINGSLEY, IA 51028-0011
PO BOX 12, KINGSLEY, IA 51028-0012
PO BOX 13, KINGSLEY, IA 51028-0013
PO BOX 14, KINGSLEY, IA 51028-0014
PO BOX 15, KINGSLEY, IA 51028-0015
PO BOX 16, KINGSLEY, IA 51028-0016
PO BOX 17, KINGSLEY, IA 51028-0017
PO BOX 18, KINGSLEY, IA 51028-0018
PO BOX 19, KINGSLEY, IA 51028-0019
PO BOX 20, KINGSLEY, IA 51028-0020
PO BOX 21, KINGSLEY, IA 51028-0021
PO BOX 22, KINGSLEY, IA 51028-0022
PO BOX 23, KINGSLEY, IA 51028-0023
PO BOX 24, KINGSLEY, IA 51028-0024
PO BOX 25, KINGSLEY, IA 51028-0025
PO BOX 26, KINGSLEY, IA 51028-0026
PO BOX 27, KINGSLEY, IA 51028-0027
PO BOX 28, KINGSLEY, IA 51028-0028
PO BOX 29, KINGSLEY, IA 51028-0029
PO BOX 30, KINGSLEY, IA 51028-0030
PO BOX 31, KINGSLEY, IA 51028-0031
PO BOX 32, KINGSLEY, IA 51028-0032
PO BOX 33, KINGSLEY, IA 51028-0033
PO BOX 34, KINGSLEY, IA 51028-0034
PO BOX 35, KINGSLEY, IA 51028-0035
PO BOX 36, KINGSLEY, IA 51028-0036
PO BOX 37, KINGSLEY, IA 51028-0037
PO BOX 38, KINGSLEY, IA 51028-0038
PO BOX 39, KINGSLEY, IA 51028-0039
PO BOX 40, KINGSLEY, IA 51028-0040
PO BOX 41, KINGSLEY, IA 51028-0041
PO BOX 42, KINGSLEY, IA 51028-0042
PO BOX 43, KINGSLEY, IA 51028-0043
PO BOX 44, KINGSLEY, IA 51028-0044
PO BOX 45, KINGSLEY, IA 51028-0045
PO BOX 46, KINGSLEY, IA 51028-0046
PO BOX 47, KINGSLEY, IA 51028-0047
PO BOX 48, KINGSLEY, IA 51028-0048
PO BOX 49, KINGSLEY, IA 51028-0049
PO BOX 50, KINGSLEY, IA 51028-0050
PO BOX 51, KINGSLEY, IA 51028-0051
PO BOX 52, KINGSLEY, IA 51028-0052
PO BOX 53, KINGSLEY, IA 51028-0053
PO BOX 54, KINGSLEY, IA 51028-0054
PO BOX 55, KINGSLEY, IA 51028-0055
PO BOX 56, KINGSLEY, IA 51028-0056
PO BOX 57, KINGSLEY, IA 51028-0057
PO BOX 58, KINGSLEY, IA 51028-0058
PO BOX 59, KINGSLEY, IA 51028-0059
PO BOX 60, KINGSLEY, IA 51028-0060
PO BOX 61, KINGSLEY, IA 51028-0061
PO BOX 62, KINGSLEY, IA 51028-0062
PO BOX 63, KINGSLEY, IA 51028-0063
PO BOX 64, KINGSLEY, IA 51028-0064
PO BOX 65, KINGSLEY, IA 51028-0065
PO BOX 66, KINGSLEY, IA 51028-0066
PO BOX 67, KINGSLEY, IA 51028-0067
PO BOX 68, KINGSLEY, IA 51028-0068
PO BOX 69, KINGSLEY, IA 51028-0069
PO BOX 70, KINGSLEY, IA 51028-0070
PO BOX 71, KINGSLEY, IA 51028-0071
PO BOX 72, KINGSLEY, IA 51028-0072
PO BOX 73, KINGSLEY, IA 51028-0073
PO BOX 74, KINGSLEY, IA 51028-0074
PO BOX 75, KINGSLEY, IA 51028-0075
PO BOX 76, KINGSLEY, IA 51028-0076
PO BOX 77, KINGSLEY, IA 51028-0077
PO BOX 78, KINGSLEY, IA 51028-0078
PO BOX 79, KINGSLEY, IA 51028-0079
PO BOX 80, KINGSLEY, IA 51028-0080
PO BOX 81, KINGSLEY, IA 51028-0081
PO BOX 82, KINGSLEY, IA 51028-0082
PO BOX 83, KINGSLEY, IA 51028-0083
PO BOX 84, KINGSLEY, IA 51028-0084
PO BOX 85, KINGSLEY, IA 51028-0085
PO BOX 86, KINGSLEY, IA 51028-0086
PO BOX 87, KINGSLEY, IA 51028-0087
PO BOX 88, KINGSLEY, IA 51028-0088
PO BOX 89, KINGSLEY, IA 51028-0089
PO BOX 90, KINGSLEY, IA 51028-0090
PO BOX 91, KINGSLEY, IA 51028-0091
PO BOX 92, KINGSLEY, IA 51028-0092
PO BOX 93, KINGSLEY, IA 51028-0093
PO BOX 94, KINGSLEY, IA 51028-0094
PO BOX 95, KINGSLEY, IA 51028-0095
PO BOX 96, KINGSLEY, IA 51028-0096
PO BOX 97, KINGSLEY, IA 51028-0097
PO BOX 98, KINGSLEY, IA 51028-0098
PO BOX 99, KINGSLEY, IA 51028-0099
PO BOX 100, KINGSLEY, IA 51028-0100
PO BOX 101, KINGSLEY, IA 51028-0101
PO BOX 102, KINGSLEY, IA 51028-0102
PO BOX 103, KINGSLEY, IA 51028-0103
PO BOX 104, KINGSLEY, IA 51028-0104
PO BOX 105, KINGSLEY, IA 51028-0105
PO BOX 106, KINGSLEY, IA 51028-0106
PO BOX 107, KINGSLEY, IA 51028-0107
PO BOX 108, KINGSLEY, IA 51028-0108
PO BOX 109, KINGSLEY, IA 51028-0109
PO BOX 110, KINGSLEY, IA 51028-0110
PO BOX 111, KINGSLEY, IA 51028-0111
PO BOX 112, KINGSLEY, IA 51028-0112
PO BOX 113, KINGSLEY, IA 51028-0113
PO BOX 114, KINGSLEY, IA 51028-0114
PO BOX 115, KINGSLEY, IA 51028-0115
PO BOX 116, KINGSLEY, IA 51028-0116
PO BOX 117, KINGSLEY, IA 51028-0117
PO BOX 118, KINGSLEY, IA 51028-0118
PO BOX 119, KINGSLEY, IA 51028-0119
PO BOX 120, KINGSLEY, IA 51028-0120
PO BOX 121, KINGSLEY, IA 51028-0121
PO BOX 122, KINGSLEY, IA 51028-0122
PO BOX 123, KINGSLEY, IA 51028-0123
PO BOX 124, KINGSLEY, IA 51028-0124
PO BOX 125, KINGSLEY, IA 51028-0125
PO BOX 126, KINGSLEY, IA 51028-0126
PO BOX 127, KINGSLEY, IA 51028-0127
PO BOX 128, KINGSLEY, IA 51028-0128
PO BOX 129, KINGSLEY, IA 51028-0129
PO BOX 130, KINGSLEY, IA 51028-0130
PO BOX 131, KINGSLEY, IA 51028-0131
PO BOX 132, KINGSLEY, IA 51028-0132
PO BOX 133, KINGSLEY, IA 51028-0133
PO BOX 134, KINGSLEY, IA 51028-0134
PO BOX 135, KINGSLEY, IA 51028-0135
PO BOX 136, KINGSLEY, IA 51028-0136
PO BOX 137, KINGSLEY, IA 51028-0137
PO BOX 138, KINGSLEY, IA 51028-0138
PO BOX 139, KINGSLEY, IA 51028-0139
PO BOX 140, KINGSLEY, IA 51028-0140
PO BOX 141, KINGSLEY, IA 51028-0141
PO BOX 142, KINGSLEY, IA 51028-0142
PO BOX 143, KINGSLEY, IA 51028-0143
PO BOX 144, KINGSLEY, IA 51028-0144
PO BOX 145, KINGSLEY, IA 51028-0145
PO BOX 146, KINGSLEY, IA 51028-0146
PO BOX 147, KINGSLEY, IA 51028-0147
PO BOX 148, KINGSLEY, IA 51028-0148
PO BOX 149, KINGSLEY, IA 51028-0149
PO BOX 150, KINGSLEY, IA 51028-0150
PO BOX 151, KINGSLEY, IA 51028-0151
PO BOX 152, KINGSLEY, IA 51028-0152
PO BOX 153, KINGSLEY, IA 51028-0153
PO BOX 154, KINGSLEY, IA 51028-0154
PO BOX 155, KINGSLEY, IA 51028-0155
PO BOX 156, KINGSLEY, IA 51028-0156
PO BOX 157, KINGSLEY, IA 51028-0157
PO BOX 158, KINGSLEY, IA 51028-0158
PO BOX 159, KINGSLEY, IA 51028-0159
PO BOX 160, KINGSLEY, IA 51028-0160
PO BOX 161, KINGSLEY, IA 51028-0161
PO BOX 162, KINGSLEY, IA 51028-0162
PO BOX 163, KINGSLEY, IA 51028-0163
PO BOX 164, KINGSLEY, IA 51028-0164
PO BOX 165, KINGSLEY, IA 51028-0165
PO BOX 166, KINGSLEY, IA 51028-0166
PO BOX 167, KINGSLEY, IA 51028-0167
PO BOX 168, KINGSLEY, IA 51028-0168
PO BOX 169, KINGSLEY, IA 51028-0169
PO BOX 170, KINGSLEY, IA 51028-0170
PO BOX 171, KINGSLEY, IA 51028-0171
PO BOX 172, KINGSLEY, IA 51028-0172
PO BOX 173, KINGSLEY, IA 51028-0173
PO BOX 174, KINGSLEY, IA 51028-0174
PO BOX 175, KINGSLEY, IA 51028-0175
PO BOX 176, KINGSLEY, IA 51028-0176
PO BOX 177, KINGSLEY, IA 51028-0177
PO BOX 178, KINGSLEY, IA 51028-0178
PO BOX 179, KINGSLEY, IA 51028-0179
PO BOX 180, KINGSLEY, IA 51028-0180
PO BOX 181, KINGSLEY, IA 51028-0181
PO BOX 182, KINGSLEY, IA 51028-0182
PO BOX 183, KINGSLEY, IA 51028-0183
PO BOX 184, KINGSLEY, IA 51028-0184
PO BOX 185, KINGSLEY, IA 51028-0185
PO BOX 186, KINGSLEY, IA 51028-0186
PO BOX 187, KINGSLEY, IA 51028-0187
PO BOX 188, KINGSLEY, IA 51028-0188
PO BOX 189, KINGSLEY, IA 51028-0189
PO BOX 190, KINGSLEY, IA 51028-0190
PO BOX 191, KINGSLEY, IA 51028-0191
PO BOX 192, KINGSLEY, IA 51028-0192
PO BOX 193, KINGSLEY, IA 51028-0193
PO BOX 194, KINGSLEY, IA 51028-0194
PO BOX 195, KINGSLEY, IA 51028-0195
PO BOX 196, KINGSLEY, IA 51028-0196
PO BOX 197, KINGSLEY, IA 51028-0197
PO BOX 198, KINGSLEY, IA 51028-0198
PO BOX 199, KINGSLEY, IA 51028-0199
PO BOX 200, KINGSLEY, IA 51028-0200
PO BOX 201, KINGSLEY, IA 51028-0201
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