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, PRIMGHAR, IA 51245-0001
PO BOX 2, PRIMGHAR, IA 51245-0002
PO BOX 3, PRIMGHAR, IA 51245-0003
PO BOX 4, PRIMGHAR, IA 51245-0004
PO BOX 5, PRIMGHAR, IA 51245-0005
PO BOX 6, PRIMGHAR, IA 51245-0006
PO BOX 7, PRIMGHAR, IA 51245-0007
PO BOX 8, PRIMGHAR, IA 51245-0008
PO BOX 9, PRIMGHAR, IA 51245-0009
PO BOX 10, PRIMGHAR, IA 51245-0010
PO BOX 11, PRIMGHAR, IA 51245-0011
PO BOX 12, PRIMGHAR, IA 51245-0012
PO BOX 13, PRIMGHAR, IA 51245-0013
PO BOX 14, PRIMGHAR, IA 51245-0014
PO BOX 15, PRIMGHAR, IA 51245-0015
PO BOX 16, PRIMGHAR, IA 51245-0016
PO BOX 17, PRIMGHAR, IA 51245-0017
PO BOX 18, PRIMGHAR, IA 51245-0018
PO BOX 19, PRIMGHAR, IA 51245-0019
PO BOX 20, PRIMGHAR, IA 51245-0020
PO BOX 21, PRIMGHAR, IA 51245-0021
PO BOX 22, PRIMGHAR, IA 51245-0022
PO BOX 23, PRIMGHAR, IA 51245-0023
PO BOX 24, PRIMGHAR, IA 51245-0024
PO BOX 25, PRIMGHAR, IA 51245-0025
PO BOX 26, PRIMGHAR, IA 51245-0026
PO BOX 27, PRIMGHAR, IA 51245-0027
PO BOX 28, PRIMGHAR, IA 51245-0028
PO BOX 29, PRIMGHAR, IA 51245-0029
PO BOX 30, PRIMGHAR, IA 51245-0030
PO BOX 31, PRIMGHAR, IA 51245-0031
PO BOX 32, PRIMGHAR, IA 51245-0032
PO BOX 33, PRIMGHAR, IA 51245-0033
PO BOX 34, PRIMGHAR, IA 51245-0034
PO BOX 35, PRIMGHAR, IA 51245-0035
PO BOX 36, PRIMGHAR, IA 51245-0036
PO BOX 37, PRIMGHAR, IA 51245-0037
PO BOX 38, PRIMGHAR, IA 51245-0038
PO BOX 39, PRIMGHAR, IA 51245-0039
PO BOX 40, PRIMGHAR, IA 51245-0040
PO BOX 41, PRIMGHAR, IA 51245-0041
PO BOX 42, PRIMGHAR, IA 51245-0042
PO BOX 43, PRIMGHAR, IA 51245-0043
PO BOX 44, PRIMGHAR, IA 51245-0044
PO BOX 45, PRIMGHAR, IA 51245-0045
PO BOX 46, PRIMGHAR, IA 51245-0046
PO BOX 47, PRIMGHAR, IA 51245-0047
PO BOX 48, PRIMGHAR, IA 51245-0048
PO BOX 49, PRIMGHAR, IA 51245-0049
PO BOX 50, PRIMGHAR, IA 51245-0050
PO BOX 51, PRIMGHAR, IA 51245-0051
PO BOX 52, PRIMGHAR, IA 51245-0052
PO BOX 53, PRIMGHAR, IA 51245-0053
PO BOX 54, PRIMGHAR, IA 51245-0054
PO BOX 55, PRIMGHAR, IA 51245-0055
PO BOX 56, PRIMGHAR, IA 51245-0056
PO BOX 57, PRIMGHAR, IA 51245-0057
PO BOX 58, PRIMGHAR, IA 51245-0058
PO BOX 59, PRIMGHAR, IA 51245-0059
PO BOX 60, PRIMGHAR, IA 51245-0060
PO BOX 61, PRIMGHAR, IA 51245-0061
PO BOX 62, PRIMGHAR, IA 51245-0062
PO BOX 63, PRIMGHAR, IA 51245-0063
PO BOX 64, PRIMGHAR, IA 51245-0064
PO BOX 65, PRIMGHAR, IA 51245-0065
PO BOX 66, PRIMGHAR, IA 51245-0066
PO BOX 67, PRIMGHAR, IA 51245-0067
PO BOX 68, PRIMGHAR, IA 51245-0068
PO BOX 69, PRIMGHAR, IA 51245-0069
PO BOX 70, PRIMGHAR, IA 51245-0070
PO BOX 71, PRIMGHAR, IA 51245-0071
PO BOX 72, PRIMGHAR, IA 51245-0072
PO BOX 73, PRIMGHAR, IA 51245-0073
PO BOX 74, PRIMGHAR, IA 51245-0074
PO BOX 75, PRIMGHAR, IA 51245-0075
PO BOX 76, PRIMGHAR, IA 51245-0076
PO BOX 77, PRIMGHAR, IA 51245-0077
PO BOX 78, PRIMGHAR, IA 51245-0078
PO BOX 79, PRIMGHAR, IA 51245-0079
PO BOX 80, PRIMGHAR, IA 51245-0080
PO BOX 81, PRIMGHAR, IA 51245-0081
PO BOX 82, PRIMGHAR, IA 51245-0082
PO BOX 83, PRIMGHAR, IA 51245-0083
PO BOX 84, PRIMGHAR, IA 51245-0084
PO BOX 85, PRIMGHAR, IA 51245-0085
PO BOX 86, PRIMGHAR, IA 51245-0086
PO BOX 87, PRIMGHAR, IA 51245-0087
PO BOX 88, PRIMGHAR, IA 51245-0088
PO BOX 89, PRIMGHAR, IA 51245-0089
PO BOX 90, PRIMGHAR, IA 51245-0090
PO BOX 91, PRIMGHAR, IA 51245-0091
PO BOX 92, PRIMGHAR, IA 51245-0092
PO BOX 93, PRIMGHAR, IA 51245-0093
PO BOX 94, PRIMGHAR, IA 51245-0094
PO BOX 95, PRIMGHAR, IA 51245-0095
PO BOX 96, PRIMGHAR, IA 51245-0096
PO BOX 97, PRIMGHAR, IA 51245-0097
PO BOX 98, PRIMGHAR, IA 51245-0098
PO BOX 99, PRIMGHAR, IA 51245-0099
PO BOX 100, PRIMGHAR, IA 51245-0100
PO BOX 101, PRIMGHAR, IA 51245-0101
PO BOX 102, PRIMGHAR, IA 51245-0102
PO BOX 103, PRIMGHAR, IA 51245-0103
PO BOX 104, PRIMGHAR, IA 51245-0104
PO BOX 105, PRIMGHAR, IA 51245-0105
PO BOX 106, PRIMGHAR, IA 51245-0106
PO BOX 107, PRIMGHAR, IA 51245-0107
PO BOX 108, PRIMGHAR, IA 51245-0108
PO BOX 109, PRIMGHAR, IA 51245-0109
PO BOX 110, PRIMGHAR, IA 51245-0110
PO BOX 111, PRIMGHAR, IA 51245-0111
PO BOX 112, PRIMGHAR, IA 51245-0112
PO BOX 113, PRIMGHAR, IA 51245-0113
PO BOX 114, PRIMGHAR, IA 51245-0114
PO BOX 115, PRIMGHAR, IA 51245-0115
PO BOX 116, PRIMGHAR, IA 51245-0116
PO BOX 117, PRIMGHAR, IA 51245-0117
PO BOX 118, PRIMGHAR, IA 51245-0118
PO BOX 119, PRIMGHAR, IA 51245-0119
PO BOX 120, PRIMGHAR, IA 51245-0120
PO BOX 121, PRIMGHAR, IA 51245-0121
PO BOX 122, PRIMGHAR, IA 51245-0122
PO BOX 123, PRIMGHAR, IA 51245-0123
PO BOX 124, PRIMGHAR, IA 51245-0124
PO BOX 125, PRIMGHAR, IA 51245-0125
PO BOX 126, PRIMGHAR, IA 51245-0126
PO BOX 127, PRIMGHAR, IA 51245-0127
PO BOX 128, PRIMGHAR, IA 51245-0128
PO BOX 129, PRIMGHAR, IA 51245-0129
PO BOX 130, PRIMGHAR, IA 51245-0130
PO BOX 131, PRIMGHAR, IA 51245-0131
PO BOX 132, PRIMGHAR, IA 51245-0132
PO BOX 133, PRIMGHAR, IA 51245-0133
PO BOX 134, PRIMGHAR, IA 51245-0134
PO BOX 135, PRIMGHAR, IA 51245-0135
PO BOX 136, PRIMGHAR, IA 51245-0136
PO BOX 137, PRIMGHAR, IA 51245-0137
PO BOX 138, PRIMGHAR, IA 51245-0138
PO BOX 139, PRIMGHAR, IA 51245-0139
PO BOX 140, PRIMGHAR, IA 51245-0140
PO BOX 141, PRIMGHAR, IA 51245-0141
PO BOX 142, PRIMGHAR, IA 51245-0142
PO BOX 143, PRIMGHAR, IA 51245-0143
PO BOX 144, PRIMGHAR, IA 51245-0144
PO BOX 145, PRIMGHAR, IA 51245-0145
PO BOX 146, PRIMGHAR, IA 51245-0146
PO BOX 147, PRIMGHAR, IA 51245-0147
PO BOX 148, PRIMGHAR, IA 51245-0148
PO BOX 149, PRIMGHAR, IA 51245-0149
PO BOX 150, PRIMGHAR, IA 51245-0150
PO BOX 151, PRIMGHAR, IA 51245-0151
PO BOX 152, PRIMGHAR, IA 51245-0152
PO BOX 153, PRIMGHAR, IA 51245-0153
PO BOX 154, PRIMGHAR, IA 51245-0154
PO BOX 155, PRIMGHAR, IA 51245-0155
PO BOX 156, PRIMGHAR, IA 51245-0156
PO BOX 157, PRIMGHAR, IA 51245-0157
PO BOX 158, PRIMGHAR, IA 51245-0158
PO BOX 159, PRIMGHAR, IA 51245-0159
PO BOX 160, PRIMGHAR, IA 51245-0160
PO BOX 161, PRIMGHAR, IA 51245-0161
PO BOX 162, PRIMGHAR, IA 51245-0162
PO BOX 163, PRIMGHAR, IA 51245-0163
PO BOX 164, PRIMGHAR, IA 51245-0164
PO BOX 165, PRIMGHAR, IA 51245-0165
PO BOX 166, PRIMGHAR, IA 51245-0166
PO BOX 167, PRIMGHAR, IA 51245-0167
PO BOX 168, PRIMGHAR, IA 51245-0168
PO BOX 169, PRIMGHAR, IA 51245-0169
PO BOX 170, PRIMGHAR, IA 51245-0170
PO BOX 171, PRIMGHAR, IA 51245-0171
PO BOX 172, PRIMGHAR, IA 51245-0172
PO BOX 173, PRIMGHAR, IA 51245-0173
PO BOX 174, PRIMGHAR, IA 51245-0174
PO BOX 175, PRIMGHAR, IA 51245-0175
PO BOX 176, PRIMGHAR, IA 51245-0176
PO BOX 177, PRIMGHAR, IA 51245-0177
PO BOX 178, PRIMGHAR, IA 51245-0178
PO BOX 179, PRIMGHAR, IA 51245-0179
PO BOX 180, PRIMGHAR, IA 51245-0180
PO BOX 181, PRIMGHAR, IA 51245-0181
PO BOX 182, PRIMGHAR, IA 51245-0182
PO BOX 183, PRIMGHAR, IA 51245-0183
PO BOX 184, PRIMGHAR, IA 51245-0184
PO BOX 185, PRIMGHAR, IA 51245-0185
PO BOX 186, PRIMGHAR, IA 51245-0186
PO BOX 187, PRIMGHAR, IA 51245-0187
PO BOX 188, PRIMGHAR, IA 51245-0188
PO BOX 189, PRIMGHAR, IA 51245-0189
PO BOX 190, PRIMGHAR, IA 51245-0190
PO BOX 191, PRIMGHAR, IA 51245-0191
PO BOX 192, PRIMGHAR, IA 51245-0192
PO BOX 193, PRIMGHAR, IA 51245-0193
PO BOX 194, PRIMGHAR, IA 51245-0194
PO BOX 195, PRIMGHAR, IA 51245-0195
PO BOX 196, PRIMGHAR, IA 51245-0196
PO BOX 197, PRIMGHAR, IA 51245-0197
PO BOX 198, PRIMGHAR, IA 51245-0198
PO BOX 199, PRIMGHAR, IA 51245-0199
PO BOX 200, PRIMGHAR, IA 51245-0200
PO BOX 201, PRIMGHAR, IA 51245-0201
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