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 21, LEASBURG, MO 65535-0021
PO BOX 22, LEASBURG, MO 65535-0022
PO BOX 23, LEASBURG, MO 65535-0023
PO BOX 24, LEASBURG, MO 65535-0024
PO BOX 25, LEASBURG, MO 65535-0025
PO BOX 26, LEASBURG, MO 65535-0026
PO BOX 27, LEASBURG, MO 65535-0027
PO BOX 28, LEASBURG, MO 65535-0028
PO BOX 29, LEASBURG, MO 65535-0029
PO BOX 30, LEASBURG, MO 65535-0030
PO BOX 31, LEASBURG, MO 65535-0031
PO BOX 32, LEASBURG, MO 65535-0032
PO BOX 33, LEASBURG, MO 65535-0033
PO BOX 34, LEASBURG, MO 65535-0034
PO BOX 35, LEASBURG, MO 65535-0035
PO BOX 36, LEASBURG, MO 65535-0036
PO BOX 37, LEASBURG, MO 65535-0037
PO BOX 38, LEASBURG, MO 65535-0038
PO BOX 39, LEASBURG, MO 65535-0039
PO BOX 40, LEASBURG, MO 65535-0040
PO BOX 41, LEASBURG, MO 65535-0041
PO BOX 42, LEASBURG, MO 65535-0042
PO BOX 43, LEASBURG, MO 65535-0043
PO BOX 44, LEASBURG, MO 65535-0044
PO BOX 45, LEASBURG, MO 65535-0045
PO BOX 46, LEASBURG, MO 65535-0046
PO BOX 47, LEASBURG, MO 65535-0047
PO BOX 48, LEASBURG, MO 65535-0048
PO BOX 49, LEASBURG, MO 65535-0049
PO BOX 50, LEASBURG, MO 65535-0050
PO BOX 51, LEASBURG, MO 65535-0051
PO BOX 52, LEASBURG, MO 65535-0052
PO BOX 53, LEASBURG, MO 65535-0053
PO BOX 54, LEASBURG, MO 65535-0054
PO BOX 55, LEASBURG, MO 65535-0055
PO BOX 56, LEASBURG, MO 65535-0056
PO BOX 57, LEASBURG, MO 65535-0057
PO BOX 58, LEASBURG, MO 65535-0058
PO BOX 59, LEASBURG, MO 65535-0059
PO BOX 60, LEASBURG, MO 65535-0060
PO BOX 61, LEASBURG, MO 65535-0061
PO BOX 62, LEASBURG, MO 65535-0062
PO BOX 63, LEASBURG, MO 65535-0063
PO BOX 64, LEASBURG, MO 65535-0064
PO BOX 65, LEASBURG, MO 65535-0065
PO BOX 66, LEASBURG, MO 65535-0066
PO BOX 67, LEASBURG, MO 65535-0067
PO BOX 68, LEASBURG, MO 65535-0068
PO BOX 69, LEASBURG, MO 65535-0069
PO BOX 70, LEASBURG, MO 65535-0070
PO BOX 71, LEASBURG, MO 65535-0071
PO BOX 72, LEASBURG, MO 65535-0072
PO BOX 73, LEASBURG, MO 65535-0073
PO BOX 74, LEASBURG, MO 65535-0074
PO BOX 75, LEASBURG, MO 65535-0075
PO BOX 76, LEASBURG, MO 65535-0076
PO BOX 77, LEASBURG, MO 65535-0077
PO BOX 78, LEASBURG, MO 65535-0078
PO BOX 79, LEASBURG, MO 65535-0079
PO BOX 80, LEASBURG, MO 65535-0080
PO BOX 81, LEASBURG, MO 65535-0081
PO BOX 82, LEASBURG, MO 65535-0082
PO BOX 83, LEASBURG, MO 65535-0083
PO BOX 84, LEASBURG, MO 65535-0084
PO BOX 85, LEASBURG, MO 65535-0085
PO BOX 86, LEASBURG, MO 65535-0086
PO BOX 87, LEASBURG, MO 65535-0087
PO BOX 88, LEASBURG, MO 65535-0088
PO BOX 89, LEASBURG, MO 65535-0089
PO BOX 90, LEASBURG, MO 65535-0090
PO BOX 91, LEASBURG, MO 65535-0091
PO BOX 92, LEASBURG, MO 65535-0092
PO BOX 93, LEASBURG, MO 65535-0093
PO BOX 94, LEASBURG, MO 65535-0094
PO BOX 95, LEASBURG, MO 65535-0095
PO BOX 96, LEASBURG, MO 65535-0096
PO BOX 97, LEASBURG, MO 65535-0097
PO BOX 98, LEASBURG, MO 65535-0098
PO BOX 99, LEASBURG, MO 65535-0099
PO BOX 100, LEASBURG, MO 65535-0100
PO BOX 101, LEASBURG, MO 65535-0101
PO BOX 102, LEASBURG, MO 65535-0102
PO BOX 103, LEASBURG, MO 65535-0103
PO BOX 104, LEASBURG, MO 65535-0104
PO BOX 105, LEASBURG, MO 65535-0105
PO BOX 106, LEASBURG, MO 65535-0106
PO BOX 107, LEASBURG, MO 65535-0107
PO BOX 108, LEASBURG, MO 65535-0108
PO BOX 109, LEASBURG, MO 65535-0109
PO BOX 110, LEASBURG, MO 65535-0110
PO BOX 111, LEASBURG, MO 65535-0111
PO BOX 112, LEASBURG, MO 65535-0112
PO BOX 113, LEASBURG, MO 65535-0113
PO BOX 114, LEASBURG, MO 65535-0114
PO BOX 115, LEASBURG, MO 65535-0115
PO BOX 116, LEASBURG, MO 65535-0116
PO BOX 117, LEASBURG, MO 65535-0117
PO BOX 118, LEASBURG, MO 65535-0118
PO BOX 119, LEASBURG, MO 65535-0119
PO BOX 120, LEASBURG, MO 65535-0120
PO BOX 121, LEASBURG, MO 65535-0121
PO BOX 122, LEASBURG, MO 65535-0122
PO BOX 123, LEASBURG, MO 65535-0123
PO BOX 124, LEASBURG, MO 65535-0124
PO BOX 125, LEASBURG, MO 65535-0125
PO BOX 126, LEASBURG, MO 65535-0126
PO BOX 127, LEASBURG, MO 65535-0127
PO BOX 128, LEASBURG, MO 65535-0128
PO BOX 129, LEASBURG, MO 65535-0129
PO BOX 130, LEASBURG, MO 65535-0130
PO BOX 131, LEASBURG, MO 65535-0131
PO BOX 132, LEASBURG, MO 65535-0132
PO BOX 133, LEASBURG, MO 65535-0133
PO BOX 134, LEASBURG, MO 65535-0134
PO BOX 135, LEASBURG, MO 65535-0135
PO BOX 136, LEASBURG, MO 65535-0136
PO BOX 137, LEASBURG, MO 65535-0137
PO BOX 138, LEASBURG, MO 65535-0138
PO BOX 139, LEASBURG, MO 65535-0139
PO BOX 140, LEASBURG, MO 65535-0140
PO BOX 141, LEASBURG, MO 65535-0141
PO BOX 142, LEASBURG, MO 65535-0142
PO BOX 143, LEASBURG, MO 65535-0143
PO BOX 144, LEASBURG, MO 65535-0144
PO BOX 145, LEASBURG, MO 65535-0145
PO BOX 146, LEASBURG, MO 65535-0146
PO BOX 147, LEASBURG, MO 65535-0147
PO BOX 148, LEASBURG, MO 65535-0148
PO BOX 149, LEASBURG, MO 65535-0149
PO BOX 150, LEASBURG, MO 65535-0150
PO BOX 151, LEASBURG, MO 65535-0151
PO BOX 152, LEASBURG, MO 65535-0152
PO BOX 153, LEASBURG, MO 65535-0153
PO BOX 154, LEASBURG, MO 65535-0154
PO BOX 155, LEASBURG, MO 65535-0155
PO BOX 156, LEASBURG, MO 65535-0156
PO BOX 157, LEASBURG, MO 65535-0157
PO BOX 158, LEASBURG, MO 65535-0158
PO BOX 159, LEASBURG, MO 65535-0159
PO BOX 160, LEASBURG, MO 65535-0160
PO BOX 161, LEASBURG, MO 65535-0161
PO BOX 162, LEASBURG, MO 65535-0162
PO BOX 163, LEASBURG, MO 65535-0163
PO BOX 164, LEASBURG, MO 65535-0164
PO BOX 165, LEASBURG, MO 65535-0165
PO BOX 166, LEASBURG, MO 65535-0166
PO BOX 167, LEASBURG, MO 65535-0167
PO BOX 168, LEASBURG, MO 65535-0168
PO BOX 169, LEASBURG, MO 65535-0169
PO BOX 170, LEASBURG, MO 65535-0170
PO BOX 171, LEASBURG, MO 65535-0171
PO BOX 172, LEASBURG, MO 65535-0172
PO BOX 173, LEASBURG, MO 65535-0173
PO BOX 174, LEASBURG, MO 65535-0174
PO BOX 175, LEASBURG, MO 65535-0175
PO BOX 176, LEASBURG, MO 65535-0176
PO BOX 177, LEASBURG, MO 65535-0177
PO BOX 178, LEASBURG, MO 65535-0178
PO BOX 179, LEASBURG, MO 65535-0179
PO BOX 180, LEASBURG, MO 65535-0180
PO BOX 181, LEASBURG, MO 65535-0181
PO BOX 182, LEASBURG, MO 65535-0182
PO BOX 183, LEASBURG, MO 65535-0183
PO BOX 184, LEASBURG, MO 65535-0184
PO BOX 185, LEASBURG, MO 65535-0185
PO BOX 186, LEASBURG, MO 65535-0186
PO BOX 187, LEASBURG, MO 65535-0187
PO BOX 188, LEASBURG, MO 65535-0188
PO BOX 189, LEASBURG, MO 65535-0189
PO BOX 190, LEASBURG, MO 65535-0190
PO BOX 191, LEASBURG, MO 65535-0191
PO BOX 192, LEASBURG, MO 65535-0192
PO BOX 193, LEASBURG, MO 65535-0193
PO BOX 194, LEASBURG, MO 65535-0194
PO BOX 195, LEASBURG, MO 65535-0195
PO BOX 196, LEASBURG, MO 65535-0196
PO BOX 197, LEASBURG, MO 65535-0197
PO BOX 198, LEASBURG, MO 65535-0198
PO BOX 199, LEASBURG, MO 65535-0199
PO BOX 200, LEASBURG, MO 65535-0200
PO BOX 201, LEASBURG, MO 65535-0201
PO BOX 202, LEASBURG, MO 65535-0202
PO BOX 203, LEASBURG, MO 65535-0203
PO BOX 204, LEASBURG, MO 65535-0204
PO BOX 205, LEASBURG, MO 65535-0205
PO BOX 206, LEASBURG, MO 65535-0206
PO BOX 207, LEASBURG, MO 65535-0207
PO BOX 208, LEASBURG, MO 65535-0208
PO BOX 209, LEASBURG, MO 65535-0209
PO BOX 210, LEASBURG, MO 65535-0210
PO BOX 211, LEASBURG, MO 65535-0211
PO BOX 212, LEASBURG, MO 65535-0212
PO BOX 213, LEASBURG, MO 65535-0213
PO BOX 214, LEASBURG, MO 65535-0214
PO BOX 215, LEASBURG, MO 65535-0215
PO BOX 216, LEASBURG, MO 65535-0216
PO BOX 217, LEASBURG, MO 65535-0217
PO BOX 218, LEASBURG, MO 65535-0218
PO BOX 219, LEASBURG, MO 65535-0219
PO BOX 220, LEASBURG, MO 65535-0220
PO BOX 221, LEASBURG, MO 65535-0221