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 11, WALNUT SHADE, MO 65771-0011
PO BOX 12, WALNUT SHADE, MO 65771-0012
PO BOX 13, WALNUT SHADE, MO 65771-0013
PO BOX 14, WALNUT SHADE, MO 65771-0014
PO BOX 15, WALNUT SHADE, MO 65771-0015
PO BOX 16, WALNUT SHADE, MO 65771-0016
PO BOX 17, WALNUT SHADE, MO 65771-0017
PO BOX 18, WALNUT SHADE, MO 65771-0018
PO BOX 19, WALNUT SHADE, MO 65771-0019
PO BOX 20, WALNUT SHADE, MO 65771-0020
PO BOX 21, WALNUT SHADE, MO 65771-0021
PO BOX 22, WALNUT SHADE, MO 65771-0022
PO BOX 23, WALNUT SHADE, MO 65771-0023
PO BOX 24, WALNUT SHADE, MO 65771-0024
PO BOX 25, WALNUT SHADE, MO 65771-0025
PO BOX 26, WALNUT SHADE, MO 65771-0026
PO BOX 27, WALNUT SHADE, MO 65771-0027
PO BOX 28, WALNUT SHADE, MO 65771-0028
PO BOX 29, WALNUT SHADE, MO 65771-0029
PO BOX 30, WALNUT SHADE, MO 65771-0030
PO BOX 31, WALNUT SHADE, MO 65771-0031
PO BOX 32, WALNUT SHADE, MO 65771-0032
PO BOX 33, WALNUT SHADE, MO 65771-0033
PO BOX 34, WALNUT SHADE, MO 65771-0034
PO BOX 35, WALNUT SHADE, MO 65771-0035
PO BOX 36, WALNUT SHADE, MO 65771-0036
PO BOX 37, WALNUT SHADE, MO 65771-0037
PO BOX 38, WALNUT SHADE, MO 65771-0038
PO BOX 39, WALNUT SHADE, MO 65771-0039
PO BOX 40, WALNUT SHADE, MO 65771-0040
PO BOX 41, WALNUT SHADE, MO 65771-0041
PO BOX 42, WALNUT SHADE, MO 65771-0042
PO BOX 43, WALNUT SHADE, MO 65771-0043
PO BOX 44, WALNUT SHADE, MO 65771-0044
PO BOX 45, WALNUT SHADE, MO 65771-0045
PO BOX 46, WALNUT SHADE, MO 65771-0046
PO BOX 47, WALNUT SHADE, MO 65771-0047
PO BOX 48, WALNUT SHADE, MO 65771-0048
PO BOX 49, WALNUT SHADE, MO 65771-0049
PO BOX 50, WALNUT SHADE, MO 65771-0050
PO BOX 51, WALNUT SHADE, MO 65771-0051
PO BOX 52, WALNUT SHADE, MO 65771-0052
PO BOX 53, WALNUT SHADE, MO 65771-0053
PO BOX 54, WALNUT SHADE, MO 65771-0054
PO BOX 55, WALNUT SHADE, MO 65771-0055
PO BOX 56, WALNUT SHADE, MO 65771-0056
PO BOX 57, WALNUT SHADE, MO 65771-0057
PO BOX 58, WALNUT SHADE, MO 65771-0058
PO BOX 59, WALNUT SHADE, MO 65771-0059
PO BOX 60, WALNUT SHADE, MO 65771-0060
PO BOX 61, WALNUT SHADE, MO 65771-0061
PO BOX 62, WALNUT SHADE, MO 65771-0062
PO BOX 63, WALNUT SHADE, MO 65771-0063
PO BOX 64, WALNUT SHADE, MO 65771-0064
PO BOX 65, WALNUT SHADE, MO 65771-0065
PO BOX 66, WALNUT SHADE, MO 65771-0066
PO BOX 67, WALNUT SHADE, MO 65771-0067
PO BOX 68, WALNUT SHADE, MO 65771-0068
PO BOX 69, WALNUT SHADE, MO 65771-0069
PO BOX 70, WALNUT SHADE, MO 65771-0070
PO BOX 71, WALNUT SHADE, MO 65771-0071
PO BOX 72, WALNUT SHADE, MO 65771-0072
PO BOX 73, WALNUT SHADE, MO 65771-0073
PO BOX 74, WALNUT SHADE, MO 65771-0074
PO BOX 75, WALNUT SHADE, MO 65771-0075
PO BOX 76, WALNUT SHADE, MO 65771-0076
PO BOX 77, WALNUT SHADE, MO 65771-0077
PO BOX 78, WALNUT SHADE, MO 65771-0078
PO BOX 79, WALNUT SHADE, MO 65771-0079
PO BOX 80, WALNUT SHADE, MO 65771-0080
PO BOX 81, WALNUT SHADE, MO 65771-0081
PO BOX 82, WALNUT SHADE, MO 65771-0082
PO BOX 83, WALNUT SHADE, MO 65771-0083
PO BOX 84, WALNUT SHADE, MO 65771-0084
PO BOX 85, WALNUT SHADE, MO 65771-0085
PO BOX 86, WALNUT SHADE, MO 65771-0086
PO BOX 87, WALNUT SHADE, MO 65771-0087
PO BOX 88, WALNUT SHADE, MO 65771-0088
PO BOX 89, WALNUT SHADE, MO 65771-0089
PO BOX 90, WALNUT SHADE, MO 65771-0090
PO BOX 91, WALNUT SHADE, MO 65771-0091
PO BOX 92, WALNUT SHADE, MO 65771-0092
PO BOX 93, WALNUT SHADE, MO 65771-0093
PO BOX 94, WALNUT SHADE, MO 65771-0094
PO BOX 95, WALNUT SHADE, MO 65771-0095
PO BOX 96, WALNUT SHADE, MO 65771-0096
PO BOX 97, WALNUT SHADE, MO 65771-0097
PO BOX 98, WALNUT SHADE, MO 65771-0098
PO BOX 99, WALNUT SHADE, MO 65771-0099
PO BOX 100, WALNUT SHADE, MO 65771-0100
PO BOX 101, WALNUT SHADE, MO 65771-0101
PO BOX 102, WALNUT SHADE, MO 65771-0102
PO BOX 103, WALNUT SHADE, MO 65771-0103
PO BOX 104, WALNUT SHADE, MO 65771-0104
PO BOX 105, WALNUT SHADE, MO 65771-0105
PO BOX 106, WALNUT SHADE, MO 65771-0106
PO BOX 107, WALNUT SHADE, MO 65771-0107
PO BOX 108, WALNUT SHADE, MO 65771-0108
PO BOX 109, WALNUT SHADE, MO 65771-0109
PO BOX 110, WALNUT SHADE, MO 65771-0110
PO BOX 111, WALNUT SHADE, MO 65771-0111
PO BOX 112, WALNUT SHADE, MO 65771-0112
PO BOX 113, WALNUT SHADE, MO 65771-0113
PO BOX 114, WALNUT SHADE, MO 65771-0114
PO BOX 115, WALNUT SHADE, MO 65771-0115
PO BOX 116, WALNUT SHADE, MO 65771-0116
PO BOX 117, WALNUT SHADE, MO 65771-0117
PO BOX 118, WALNUT SHADE, MO 65771-0118
PO BOX 119, WALNUT SHADE, MO 65771-0119
PO BOX 120, WALNUT SHADE, MO 65771-0120
PO BOX 121, WALNUT SHADE, MO 65771-0121
PO BOX 122, WALNUT SHADE, MO 65771-0122
PO BOX 123, WALNUT SHADE, MO 65771-0123
PO BOX 124, WALNUT SHADE, MO 65771-0124
PO BOX 125, WALNUT SHADE, MO 65771-0125
PO BOX 126, WALNUT SHADE, MO 65771-0126
PO BOX 127, WALNUT SHADE, MO 65771-0127
PO BOX 128, WALNUT SHADE, MO 65771-0128
PO BOX 129, WALNUT SHADE, MO 65771-0129
PO BOX 130, WALNUT SHADE, MO 65771-0130
PO BOX 131, WALNUT SHADE, MO 65771-0131
PO BOX 132, WALNUT SHADE, MO 65771-0132
PO BOX 133, WALNUT SHADE, MO 65771-0133
PO BOX 134, WALNUT SHADE, MO 65771-0134
PO BOX 135, WALNUT SHADE, MO 65771-0135
PO BOX 136, WALNUT SHADE, MO 65771-0136
PO BOX 137, WALNUT SHADE, MO 65771-0137
PO BOX 138, WALNUT SHADE, MO 65771-0138
PO BOX 139, WALNUT SHADE, MO 65771-0139
PO BOX 140, WALNUT SHADE, MO 65771-0140
PO BOX 141, WALNUT SHADE, MO 65771-0141
PO BOX 142, WALNUT SHADE, MO 65771-0142
PO BOX 143, WALNUT SHADE, MO 65771-0143
PO BOX 144, WALNUT SHADE, MO 65771-0144
PO BOX 145, WALNUT SHADE, MO 65771-0145
PO BOX 146, WALNUT SHADE, MO 65771-0146
PO BOX 147, WALNUT SHADE, MO 65771-0147
PO BOX 148, WALNUT SHADE, MO 65771-0148
PO BOX 149, WALNUT SHADE, MO 65771-0149
PO BOX 150, WALNUT SHADE, MO 65771-0150
PO BOX 151, WALNUT SHADE, MO 65771-0151
PO BOX 152, WALNUT SHADE, MO 65771-0152
PO BOX 153, WALNUT SHADE, MO 65771-0153
PO BOX 154, WALNUT SHADE, MO 65771-0154
PO BOX 155, WALNUT SHADE, MO 65771-0155
PO BOX 156, WALNUT SHADE, MO 65771-0156
PO BOX 157, WALNUT SHADE, MO 65771-0157
PO BOX 158, WALNUT SHADE, MO 65771-0158
PO BOX 159, WALNUT SHADE, MO 65771-0159
PO BOX 160, WALNUT SHADE, MO 65771-0160
PO BOX 161, WALNUT SHADE, MO 65771-0161
PO BOX 162, WALNUT SHADE, MO 65771-0162
PO BOX 163, WALNUT SHADE, MO 65771-0163
PO BOX 164, WALNUT SHADE, MO 65771-0164
PO BOX 165, WALNUT SHADE, MO 65771-0165
PO BOX 166, WALNUT SHADE, MO 65771-0166
PO BOX 167, WALNUT SHADE, MO 65771-0167
PO BOX 168, WALNUT SHADE, MO 65771-0168
PO BOX 169, WALNUT SHADE, MO 65771-0169
PO BOX 170, WALNUT SHADE, MO 65771-0170
PO BOX 171, WALNUT SHADE, MO 65771-0171
PO BOX 172, WALNUT SHADE, MO 65771-0172
PO BOX 173, WALNUT SHADE, MO 65771-0173
PO BOX 174, WALNUT SHADE, MO 65771-0174
PO BOX 175, WALNUT SHADE, MO 65771-0175
PO BOX 176, WALNUT SHADE, MO 65771-0176
PO BOX 177, WALNUT SHADE, MO 65771-0177
PO BOX 178, WALNUT SHADE, MO 65771-0178
PO BOX 179, WALNUT SHADE, MO 65771-0179
PO BOX 180, WALNUT SHADE, MO 65771-0180
PO BOX 181, WALNUT SHADE, MO 65771-0181
PO BOX 182, WALNUT SHADE, MO 65771-0182
PO BOX 183, WALNUT SHADE, MO 65771-0183
PO BOX 184, WALNUT SHADE, MO 65771-0184
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