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, SAGINAW, MO 64864-0001
PO BOX 2, SAGINAW, MO 64864-0002
PO BOX 3, SAGINAW, MO 64864-0003
PO BOX 4, SAGINAW, MO 64864-0004
PO BOX 5, SAGINAW, MO 64864-0005
PO BOX 6, SAGINAW, MO 64864-0006
PO BOX 7, SAGINAW, MO 64864-0007
PO BOX 8, SAGINAW, MO 64864-0008
PO BOX 9, SAGINAW, MO 64864-0009
PO BOX 10, SAGINAW, MO 64864-0010
PO BOX 11, SAGINAW, MO 64864-0011
PO BOX 12, SAGINAW, MO 64864-0012
PO BOX 13, SAGINAW, MO 64864-0013
PO BOX 14, SAGINAW, MO 64864-0014
PO BOX 15, SAGINAW, MO 64864-0015
PO BOX 16, SAGINAW, MO 64864-0016
PO BOX 17, SAGINAW, MO 64864-0017
PO BOX 18, SAGINAW, MO 64864-0018
PO BOX 19, SAGINAW, MO 64864-0019
PO BOX 20, SAGINAW, MO 64864-0020
PO BOX 21, SAGINAW, MO 64864-0021
PO BOX 22, SAGINAW, MO 64864-0022
PO BOX 23, SAGINAW, MO 64864-0023
PO BOX 24, SAGINAW, MO 64864-0024
PO BOX 25, SAGINAW, MO 64864-0025
PO BOX 26, SAGINAW, MO 64864-0026
PO BOX 27, SAGINAW, MO 64864-0027
PO BOX 28, SAGINAW, MO 64864-0028
PO BOX 29, SAGINAW, MO 64864-0029
PO BOX 30, SAGINAW, MO 64864-0030
PO BOX 31, SAGINAW, MO 64864-0031
PO BOX 32, SAGINAW, MO 64864-0032
PO BOX 33, SAGINAW, MO 64864-0033
PO BOX 34, SAGINAW, MO 64864-0034
PO BOX 35, SAGINAW, MO 64864-0035
PO BOX 36, SAGINAW, MO 64864-0036
PO BOX 37, SAGINAW, MO 64864-0037
PO BOX 38, SAGINAW, MO 64864-0038
PO BOX 39, SAGINAW, MO 64864-0039
PO BOX 40, SAGINAW, MO 64864-0040
PO BOX 41, SAGINAW, MO 64864-0041
PO BOX 42, SAGINAW, MO 64864-0042
PO BOX 43, SAGINAW, MO 64864-0043
PO BOX 44, SAGINAW, MO 64864-0044
PO BOX 45, SAGINAW, MO 64864-0045
PO BOX 46, SAGINAW, MO 64864-0046
PO BOX 47, SAGINAW, MO 64864-0047
PO BOX 48, SAGINAW, MO 64864-0048
PO BOX 49, SAGINAW, MO 64864-0049
PO BOX 50, SAGINAW, MO 64864-0050
PO BOX 51, SAGINAW, MO 64864-0051
PO BOX 52, SAGINAW, MO 64864-0052
PO BOX 53, SAGINAW, MO 64864-0053
PO BOX 54, SAGINAW, MO 64864-0054
PO BOX 55, SAGINAW, MO 64864-0055
PO BOX 56, SAGINAW, MO 64864-0056
PO BOX 57, SAGINAW, MO 64864-0057
PO BOX 58, SAGINAW, MO 64864-0058
PO BOX 59, SAGINAW, MO 64864-0059
PO BOX 60, SAGINAW, MO 64864-0060
PO BOX 61, SAGINAW, MO 64864-0061
PO BOX 62, SAGINAW, MO 64864-0062
PO BOX 63, SAGINAW, MO 64864-0063
PO BOX 64, SAGINAW, MO 64864-0064
PO BOX 65, SAGINAW, MO 64864-0065
PO BOX 66, SAGINAW, MO 64864-0066
PO BOX 67, SAGINAW, MO 64864-0067
PO BOX 68, SAGINAW, MO 64864-0068
PO BOX 69, SAGINAW, MO 64864-0069
PO BOX 70, SAGINAW, MO 64864-0070
PO BOX 71, SAGINAW, MO 64864-0071
PO BOX 72, SAGINAW, MO 64864-0072
PO BOX 73, SAGINAW, MO 64864-0073
PO BOX 74, SAGINAW, MO 64864-0074
PO BOX 75, SAGINAW, MO 64864-0075
PO BOX 76, SAGINAW, MO 64864-0076
PO BOX 77, SAGINAW, MO 64864-0077
PO BOX 78, SAGINAW, MO 64864-0078
PO BOX 79, SAGINAW, MO 64864-0079
PO BOX 80, SAGINAW, MO 64864-0080
PO BOX 81, SAGINAW, MO 64864-0081
PO BOX 82, SAGINAW, MO 64864-0082
PO BOX 83, SAGINAW, MO 64864-0083
PO BOX 84, SAGINAW, MO 64864-0084
PO BOX 85, SAGINAW, MO 64864-0085
PO BOX 86, SAGINAW, MO 64864-0086
PO BOX 87, SAGINAW, MO 64864-0087
PO BOX 88, SAGINAW, MO 64864-0088
PO BOX 89, SAGINAW, MO 64864-0089
PO BOX 90, SAGINAW, MO 64864-0090
PO BOX 91, SAGINAW, MO 64864-0091
PO BOX 92, SAGINAW, MO 64864-0092
PO BOX 93, SAGINAW, MO 64864-0093
PO BOX 94, SAGINAW, MO 64864-0094
PO BOX 95, SAGINAW, MO 64864-0095
PO BOX 96, SAGINAW, MO 64864-0096
PO BOX 97, SAGINAW, MO 64864-0097
PO BOX 98, SAGINAW, MO 64864-0098
PO BOX 99, SAGINAW, MO 64864-0099
PO BOX 100, SAGINAW, MO 64864-0100
PO BOX 101, SAGINAW, MO 64864-0101
PO BOX 102, SAGINAW, MO 64864-0102
PO BOX 103, SAGINAW, MO 64864-0103
PO BOX 104, SAGINAW, MO 64864-0104
PO BOX 105, SAGINAW, MO 64864-0105
PO BOX 106, SAGINAW, MO 64864-0106
PO BOX 107, SAGINAW, MO 64864-0107
PO BOX 108, SAGINAW, MO 64864-0108
PO BOX 109, SAGINAW, MO 64864-0109
PO BOX 110, SAGINAW, MO 64864-0110
PO BOX 111, SAGINAW, MO 64864-0111
PO BOX 112, SAGINAW, MO 64864-0112
PO BOX 113, SAGINAW, MO 64864-0113
PO BOX 114, SAGINAW, MO 64864-0114
PO BOX 115, SAGINAW, MO 64864-0115
PO BOX 116, SAGINAW, MO 64864-0116
PO BOX 117, SAGINAW, MO 64864-0117
PO BOX 118, SAGINAW, MO 64864-0118
PO BOX 119, SAGINAW, MO 64864-0119
PO BOX 120, SAGINAW, MO 64864-0120
PO BOX 121, SAGINAW, MO 64864-0121
PO BOX 122, SAGINAW, MO 64864-0122
PO BOX 123, SAGINAW, MO 64864-0123
PO BOX 124, SAGINAW, MO 64864-0124
PO BOX 125, SAGINAW, MO 64864-0125
PO BOX 126, SAGINAW, MO 64864-0126
PO BOX 127, SAGINAW, MO 64864-0127
PO BOX 128, SAGINAW, MO 64864-0128
PO BOX 129, SAGINAW, MO 64864-0129
PO BOX 130, SAGINAW, MO 64864-0130
PO BOX 131, SAGINAW, MO 64864-0131
PO BOX 132, SAGINAW, MO 64864-0132
PO BOX 133, SAGINAW, MO 64864-0133
PO BOX 134, SAGINAW, MO 64864-0134
PO BOX 135, SAGINAW, MO 64864-0135
PO BOX 136, SAGINAW, MO 64864-0136
PO BOX 137, SAGINAW, MO 64864-0137
PO BOX 138, SAGINAW, MO 64864-0138
PO BOX 139, SAGINAW, MO 64864-0139
PO BOX 140, SAGINAW, MO 64864-0140
PO BOX 141, SAGINAW, MO 64864-0141
PO BOX 142, SAGINAW, MO 64864-0142
PO BOX 143, SAGINAW, MO 64864-0143
PO BOX 144, SAGINAW, MO 64864-0144
PO BOX 145, SAGINAW, MO 64864-0145
PO BOX 146, SAGINAW, MO 64864-0146
PO BOX 147, SAGINAW, MO 64864-0147
PO BOX 148, SAGINAW, MO 64864-0148
PO BOX 149, SAGINAW, MO 64864-0149
PO BOX 150, SAGINAW, MO 64864-0150
PO BOX 151, SAGINAW, MO 64864-0151
PO BOX 152, SAGINAW, MO 64864-0152
PO BOX 153, SAGINAW, MO 64864-0153
PO BOX 154, SAGINAW, MO 64864-0154
PO BOX 155, SAGINAW, MO 64864-0155
PO BOX 156, SAGINAW, MO 64864-0156
PO BOX 157, SAGINAW, MO 64864-0157
PO BOX 158, SAGINAW, MO 64864-0158
PO BOX 159, SAGINAW, MO 64864-0159
PO BOX 160, SAGINAW, MO 64864-0160
PO BOX 161, SAGINAW, MO 64864-0161
PO BOX 162, SAGINAW, MO 64864-0162
PO BOX 163, SAGINAW, MO 64864-0163
PO BOX 164, SAGINAW, MO 64864-0164
PO BOX 165, SAGINAW, MO 64864-0165
PO BOX 166, SAGINAW, MO 64864-0166
PO BOX 167, SAGINAW, MO 64864-0167
PO BOX 168, SAGINAW, MO 64864-0168
PO BOX 169, SAGINAW, MO 64864-0169
PO BOX 170, SAGINAW, MO 64864-0170
PO BOX 171, SAGINAW, MO 64864-0171
PO BOX 172, SAGINAW, MO 64864-0172
PO BOX 173, SAGINAW, MO 64864-0173
PO BOX 174, SAGINAW, MO 64864-0174
PO BOX 175, SAGINAW, MO 64864-0175
PO BOX 176, SAGINAW, MO 64864-0176
PO BOX 177, SAGINAW, MO 64864-0177
PO BOX 178, SAGINAW, MO 64864-0178
PO BOX 179, SAGINAW, MO 64864-0179
PO BOX 180, SAGINAW, MO 64864-0180
PO BOX 181, SAGINAW, MO 64864-0181
PO BOX 182, SAGINAW, MO 64864-0182
PO BOX 183, SAGINAW, MO 64864-0183
PO BOX 184, SAGINAW, MO 64864-0184
PO BOX 185, SAGINAW, MO 64864-0185
PO BOX 186, SAGINAW, MO 64864-0186
PO BOX 187, SAGINAW, MO 64864-0187
PO BOX 188, SAGINAW, MO 64864-0188
PO BOX 189, SAGINAW, MO 64864-0189
PO BOX 190, SAGINAW, MO 64864-0190
PO BOX 191, SAGINAW, MO 64864-0191
PO BOX 192, SAGINAW, MO 64864-0192
PO BOX 193, SAGINAW, MO 64864-0193
PO BOX 194, SAGINAW, MO 64864-0194
PO BOX 195, SAGINAW, MO 64864-0195
PO BOX 196, SAGINAW, MO 64864-0196
PO BOX 197, SAGINAW, MO 64864-0197
PO BOX 198, SAGINAW, MO 64864-0198
PO BOX 199, SAGINAW, MO 64864-0199
PO BOX 200, SAGINAW, MO 64864-0200
PO BOX 201, SAGINAW, MO 64864-0201
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