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, LEHIGH, IA 50557-0001
PO BOX 2, LEHIGH, IA 50557-0002
PO BOX 3, LEHIGH, IA 50557-0003
PO BOX 4, LEHIGH, IA 50557-0004
PO BOX 5, LEHIGH, IA 50557-0005
PO BOX 6, LEHIGH, IA 50557-0006
PO BOX 7, LEHIGH, IA 50557-0007
PO BOX 8, LEHIGH, IA 50557-0008
PO BOX 9, LEHIGH, IA 50557-0009
PO BOX 10, LEHIGH, IA 50557-0010
PO BOX 11, LEHIGH, IA 50557-0011
PO BOX 12, LEHIGH, IA 50557-0012
PO BOX 13, LEHIGH, IA 50557-0013
PO BOX 14, LEHIGH, IA 50557-0014
PO BOX 15, LEHIGH, IA 50557-0015
PO BOX 16, LEHIGH, IA 50557-0016
PO BOX 17, LEHIGH, IA 50557-0017
PO BOX 18, LEHIGH, IA 50557-0018
PO BOX 19, LEHIGH, IA 50557-0019
PO BOX 20, LEHIGH, IA 50557-0020
PO BOX 21, LEHIGH, IA 50557-0021
PO BOX 22, LEHIGH, IA 50557-0022
PO BOX 23, LEHIGH, IA 50557-0023
PO BOX 24, LEHIGH, IA 50557-0024
PO BOX 25, LEHIGH, IA 50557-0025
PO BOX 26, LEHIGH, IA 50557-0026
PO BOX 27, LEHIGH, IA 50557-0027
PO BOX 28, LEHIGH, IA 50557-0028
PO BOX 29, LEHIGH, IA 50557-0029
PO BOX 30, LEHIGH, IA 50557-0030
PO BOX 31, LEHIGH, IA 50557-0031
PO BOX 32, LEHIGH, IA 50557-0032
PO BOX 33, LEHIGH, IA 50557-0033
PO BOX 34, LEHIGH, IA 50557-0034
PO BOX 35, LEHIGH, IA 50557-0035
PO BOX 36, LEHIGH, IA 50557-0036
PO BOX 37, LEHIGH, IA 50557-0037
PO BOX 38, LEHIGH, IA 50557-0038
PO BOX 39, LEHIGH, IA 50557-0039
PO BOX 40, LEHIGH, IA 50557-0040
PO BOX 41, LEHIGH, IA 50557-0041
PO BOX 42, LEHIGH, IA 50557-0042
PO BOX 43, LEHIGH, IA 50557-0043
PO BOX 44, LEHIGH, IA 50557-0044
PO BOX 45, LEHIGH, IA 50557-0045
PO BOX 46, LEHIGH, IA 50557-0046
PO BOX 47, LEHIGH, IA 50557-0047
PO BOX 48, LEHIGH, IA 50557-0048
PO BOX 49, LEHIGH, IA 50557-0049
PO BOX 50, LEHIGH, IA 50557-0050
PO BOX 51, LEHIGH, IA 50557-0051
PO BOX 52, LEHIGH, IA 50557-0052
PO BOX 53, LEHIGH, IA 50557-0053
PO BOX 54, LEHIGH, IA 50557-0054
PO BOX 55, LEHIGH, IA 50557-0055
PO BOX 56, LEHIGH, IA 50557-0056
PO BOX 57, LEHIGH, IA 50557-0057
PO BOX 58, LEHIGH, IA 50557-0058
PO BOX 59, LEHIGH, IA 50557-0059
PO BOX 60, LEHIGH, IA 50557-0060
PO BOX 61, LEHIGH, IA 50557-0061
PO BOX 62, LEHIGH, IA 50557-0062
PO BOX 63, LEHIGH, IA 50557-0063
PO BOX 64, LEHIGH, IA 50557-0064
PO BOX 65, LEHIGH, IA 50557-0065
PO BOX 66, LEHIGH, IA 50557-0066
PO BOX 67, LEHIGH, IA 50557-0067
PO BOX 68, LEHIGH, IA 50557-0068
PO BOX 69, LEHIGH, IA 50557-0069
PO BOX 70, LEHIGH, IA 50557-0070
PO BOX 71, LEHIGH, IA 50557-0071
PO BOX 72, LEHIGH, IA 50557-0072
PO BOX 73, LEHIGH, IA 50557-0073
PO BOX 74, LEHIGH, IA 50557-0074
PO BOX 75, LEHIGH, IA 50557-0075
PO BOX 76, LEHIGH, IA 50557-0076
PO BOX 77, LEHIGH, IA 50557-0077
PO BOX 78, LEHIGH, IA 50557-0078
PO BOX 79, LEHIGH, IA 50557-0079
PO BOX 80, LEHIGH, IA 50557-0080
PO BOX 81, LEHIGH, IA 50557-0081
PO BOX 82, LEHIGH, IA 50557-0082
PO BOX 83, LEHIGH, IA 50557-0083
PO BOX 84, LEHIGH, IA 50557-0084
PO BOX 85, LEHIGH, IA 50557-0085
PO BOX 86, LEHIGH, IA 50557-0086
PO BOX 87, LEHIGH, IA 50557-0087
PO BOX 88, LEHIGH, IA 50557-0088
PO BOX 89, LEHIGH, IA 50557-0089
PO BOX 90, LEHIGH, IA 50557-0090
PO BOX 91, LEHIGH, IA 50557-0091
PO BOX 92, LEHIGH, IA 50557-0092
PO BOX 93, LEHIGH, IA 50557-0093
PO BOX 94, LEHIGH, IA 50557-0094
PO BOX 95, LEHIGH, IA 50557-0095
PO BOX 96, LEHIGH, IA 50557-0096
PO BOX 97, LEHIGH, IA 50557-0097
PO BOX 98, LEHIGH, IA 50557-0098
PO BOX 99, LEHIGH, IA 50557-0099
PO BOX 100, LEHIGH, IA 50557-0100
PO BOX 101, LEHIGH, IA 50557-0101
PO BOX 102, LEHIGH, IA 50557-0102
PO BOX 103, LEHIGH, IA 50557-0103
PO BOX 104, LEHIGH, IA 50557-0104
PO BOX 105, LEHIGH, IA 50557-0105
PO BOX 106, LEHIGH, IA 50557-0106
PO BOX 107, LEHIGH, IA 50557-0107
PO BOX 108, LEHIGH, IA 50557-0108
PO BOX 109, LEHIGH, IA 50557-0109
PO BOX 110, LEHIGH, IA 50557-0110
PO BOX 111, LEHIGH, IA 50557-0111
PO BOX 112, LEHIGH, IA 50557-0112
PO BOX 113, LEHIGH, IA 50557-0113
PO BOX 114, LEHIGH, IA 50557-0114
PO BOX 115, LEHIGH, IA 50557-0115
PO BOX 116, LEHIGH, IA 50557-0116
PO BOX 117, LEHIGH, IA 50557-0117
PO BOX 118, LEHIGH, IA 50557-0118
PO BOX 119, LEHIGH, IA 50557-0119
PO BOX 120, LEHIGH, IA 50557-0120
PO BOX 121, LEHIGH, IA 50557-0121
PO BOX 122, LEHIGH, IA 50557-0122
PO BOX 123, LEHIGH, IA 50557-0123
PO BOX 124, LEHIGH, IA 50557-0124
PO BOX 125, LEHIGH, IA 50557-0125
PO BOX 126, LEHIGH, IA 50557-0126
PO BOX 127, LEHIGH, IA 50557-0127
PO BOX 128, LEHIGH, IA 50557-0128
PO BOX 129, LEHIGH, IA 50557-0129
PO BOX 130, LEHIGH, IA 50557-0130
PO BOX 131, LEHIGH, IA 50557-0131
PO BOX 132, LEHIGH, IA 50557-0132
PO BOX 133, LEHIGH, IA 50557-0133
PO BOX 134, LEHIGH, IA 50557-0134
PO BOX 135, LEHIGH, IA 50557-0135
PO BOX 136, LEHIGH, IA 50557-0136
PO BOX 137, LEHIGH, IA 50557-0137
PO BOX 138, LEHIGH, IA 50557-0138
PO BOX 139, LEHIGH, IA 50557-0139
PO BOX 140, LEHIGH, IA 50557-0140
PO BOX 141, LEHIGH, IA 50557-0141
PO BOX 142, LEHIGH, IA 50557-0142
PO BOX 143, LEHIGH, IA 50557-0143
PO BOX 144, LEHIGH, IA 50557-0144
PO BOX 145, LEHIGH, IA 50557-0145
PO BOX 146, LEHIGH, IA 50557-0146
PO BOX 147, LEHIGH, IA 50557-0147
PO BOX 148, LEHIGH, IA 50557-0148
PO BOX 149, LEHIGH, IA 50557-0149
PO BOX 150, LEHIGH, IA 50557-0150
PO BOX 151, LEHIGH, IA 50557-0151
PO BOX 152, LEHIGH, IA 50557-0152
PO BOX 153, LEHIGH, IA 50557-0153
PO BOX 154, LEHIGH, IA 50557-0154
PO BOX 155, LEHIGH, IA 50557-0155
PO BOX 156, LEHIGH, IA 50557-0156
PO BOX 157, LEHIGH, IA 50557-0157
PO BOX 158, LEHIGH, IA 50557-0158
PO BOX 159, LEHIGH, IA 50557-0159
PO BOX 160, LEHIGH, IA 50557-0160
PO BOX 161, LEHIGH, IA 50557-0161
PO BOX 162, LEHIGH, IA 50557-0162
PO BOX 163, LEHIGH, IA 50557-0163
PO BOX 164, LEHIGH, IA 50557-0164
PO BOX 165, LEHIGH, IA 50557-0165
PO BOX 166, LEHIGH, IA 50557-0166
PO BOX 167, LEHIGH, IA 50557-0167
PO BOX 168, LEHIGH, IA 50557-0168
PO BOX 169, LEHIGH, IA 50557-0169
PO BOX 170, LEHIGH, IA 50557-0170
PO BOX 171, LEHIGH, IA 50557-0171
PO BOX 172, LEHIGH, IA 50557-0172
PO BOX 173, LEHIGH, IA 50557-0173
PO BOX 174, LEHIGH, IA 50557-0174
PO BOX 175, LEHIGH, IA 50557-0175
PO BOX 176, LEHIGH, IA 50557-0176
PO BOX 177, LEHIGH, IA 50557-0177
PO BOX 178, LEHIGH, IA 50557-0178
PO BOX 179, LEHIGH, IA 50557-0179
PO BOX 180, LEHIGH, IA 50557-0180
PO BOX 181, LEHIGH, IA 50557-0181
PO BOX 182, LEHIGH, IA 50557-0182
PO BOX 183, LEHIGH, IA 50557-0183
PO BOX 184, LEHIGH, IA 50557-0184
PO BOX 185, LEHIGH, IA 50557-0185
PO BOX 186, LEHIGH, IA 50557-0186
PO BOX 187, LEHIGH, IA 50557-0187
PO BOX 188, LEHIGH, IA 50557-0188
PO BOX 189, LEHIGH, IA 50557-0189
PO BOX 190, LEHIGH, IA 50557-0190
PO BOX 191, LEHIGH, IA 50557-0191
PO BOX 192, LEHIGH, IA 50557-0192
PO BOX 193, LEHIGH, IA 50557-0193
PO BOX 194, LEHIGH, IA 50557-0194
PO BOX 195, LEHIGH, IA 50557-0195
PO BOX 196, LEHIGH, IA 50557-0196
PO BOX 197, LEHIGH, IA 50557-0197
PO BOX 198, LEHIGH, IA 50557-0198
PO BOX 199, LEHIGH, IA 50557-0199
PO BOX 200, LEHIGH, IA 50557-0200
PO BOX 201, LEHIGH, IA 50557-0201
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