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, SAINTE GENEVIEVE, MO 63670-0001
PO BOX 2, SAINTE GENEVIEVE, MO 63670-0002
PO BOX 3, SAINTE GENEVIEVE, MO 63670-0003
PO BOX 4, SAINTE GENEVIEVE, MO 63670-0004
PO BOX 5, SAINTE GENEVIEVE, MO 63670-0005
PO BOX 6, SAINTE GENEVIEVE, MO 63670-0006
PO BOX 7, SAINTE GENEVIEVE, MO 63670-0007
PO BOX 8, SAINTE GENEVIEVE, MO 63670-0008
PO BOX 9, SAINTE GENEVIEVE, MO 63670-0009
PO BOX 10, SAINTE GENEVIEVE, MO 63670-0010
PO BOX 11, SAINTE GENEVIEVE, MO 63670-0011
PO BOX 12, SAINTE GENEVIEVE, MO 63670-0012
PO BOX 13, SAINTE GENEVIEVE, MO 63670-0013
PO BOX 14, SAINTE GENEVIEVE, MO 63670-0014
PO BOX 15, SAINTE GENEVIEVE, MO 63670-0015
PO BOX 16, SAINTE GENEVIEVE, MO 63670-0016
PO BOX 17, SAINTE GENEVIEVE, MO 63670-0017
PO BOX 18, SAINTE GENEVIEVE, MO 63670-0018
PO BOX 19, SAINTE GENEVIEVE, MO 63670-0019
PO BOX 20, SAINTE GENEVIEVE, MO 63670-0020
PO BOX 21, SAINTE GENEVIEVE, MO 63670-0021
PO BOX 22, SAINTE GENEVIEVE, MO 63670-0022
PO BOX 23, SAINTE GENEVIEVE, MO 63670-0023
PO BOX 24, SAINTE GENEVIEVE, MO 63670-0024
PO BOX 25, SAINTE GENEVIEVE, MO 63670-0025
PO BOX 26, SAINTE GENEVIEVE, MO 63670-0026
PO BOX 27, SAINTE GENEVIEVE, MO 63670-0027
PO BOX 28, SAINTE GENEVIEVE, MO 63670-0028
PO BOX 29, SAINTE GENEVIEVE, MO 63670-0029
PO BOX 30, SAINTE GENEVIEVE, MO 63670-0030
PO BOX 31, SAINTE GENEVIEVE, MO 63670-0031
PO BOX 32, SAINTE GENEVIEVE, MO 63670-0032
PO BOX 33, SAINTE GENEVIEVE, MO 63670-0033
PO BOX 34, SAINTE GENEVIEVE, MO 63670-0034
PO BOX 35, SAINTE GENEVIEVE, MO 63670-0035
PO BOX 36, SAINTE GENEVIEVE, MO 63670-0036
PO BOX 37, SAINTE GENEVIEVE, MO 63670-0037
PO BOX 38, SAINTE GENEVIEVE, MO 63670-0038
PO BOX 39, SAINTE GENEVIEVE, MO 63670-0039
PO BOX 40, SAINTE GENEVIEVE, MO 63670-0040
PO BOX 41, SAINTE GENEVIEVE, MO 63670-0041
PO BOX 42, SAINTE GENEVIEVE, MO 63670-0042
PO BOX 43, SAINTE GENEVIEVE, MO 63670-0043
PO BOX 44, SAINTE GENEVIEVE, MO 63670-0044
PO BOX 45, SAINTE GENEVIEVE, MO 63670-0045
PO BOX 46, SAINTE GENEVIEVE, MO 63670-0046
PO BOX 47, SAINTE GENEVIEVE, MO 63670-0047
PO BOX 48, SAINTE GENEVIEVE, MO 63670-0048
PO BOX 49, SAINTE GENEVIEVE, MO 63670-0049
PO BOX 50, SAINTE GENEVIEVE, MO 63670-0050
PO BOX 51, SAINTE GENEVIEVE, MO 63670-0051
PO BOX 52, SAINTE GENEVIEVE, MO 63670-0052
PO BOX 53, SAINTE GENEVIEVE, MO 63670-0053
PO BOX 54, SAINTE GENEVIEVE, MO 63670-0054
PO BOX 55, SAINTE GENEVIEVE, MO 63670-0055
PO BOX 56, SAINTE GENEVIEVE, MO 63670-0056
PO BOX 57, SAINTE GENEVIEVE, MO 63670-0057
PO BOX 58, SAINTE GENEVIEVE, MO 63670-0058
PO BOX 59, SAINTE GENEVIEVE, MO 63670-0059
PO BOX 60, SAINTE GENEVIEVE, MO 63670-0060
PO BOX 61, SAINTE GENEVIEVE, MO 63670-0061
PO BOX 62, SAINTE GENEVIEVE, MO 63670-0062
PO BOX 63, SAINTE GENEVIEVE, MO 63670-0063
PO BOX 64, SAINTE GENEVIEVE, MO 63670-0064
PO BOX 65, SAINTE GENEVIEVE, MO 63670-0065
PO BOX 66, SAINTE GENEVIEVE, MO 63670-0066
PO BOX 67, SAINTE GENEVIEVE, MO 63670-0067
PO BOX 68, SAINTE GENEVIEVE, MO 63670-0068
PO BOX 69, SAINTE GENEVIEVE, MO 63670-0069
PO BOX 70, SAINTE GENEVIEVE, MO 63670-0070
PO BOX 71, SAINTE GENEVIEVE, MO 63670-0071
PO BOX 72, SAINTE GENEVIEVE, MO 63670-0072
PO BOX 73, SAINTE GENEVIEVE, MO 63670-0073
PO BOX 74, SAINTE GENEVIEVE, MO 63670-0074
PO BOX 75, SAINTE GENEVIEVE, MO 63670-0075
PO BOX 76, SAINTE GENEVIEVE, MO 63670-0076
PO BOX 77, SAINTE GENEVIEVE, MO 63670-0077
PO BOX 78, SAINTE GENEVIEVE, MO 63670-0078
PO BOX 79, SAINTE GENEVIEVE, MO 63670-0079
PO BOX 80, SAINTE GENEVIEVE, MO 63670-0080
PO BOX 81, SAINTE GENEVIEVE, MO 63670-0081
PO BOX 82, SAINTE GENEVIEVE, MO 63670-0082
PO BOX 83, SAINTE GENEVIEVE, MO 63670-0083
PO BOX 84, SAINTE GENEVIEVE, MO 63670-0084
PO BOX 85, SAINTE GENEVIEVE, MO 63670-0085
PO BOX 86, SAINTE GENEVIEVE, MO 63670-0086
PO BOX 87, SAINTE GENEVIEVE, MO 63670-0087
PO BOX 88, SAINTE GENEVIEVE, MO 63670-0088
PO BOX 89, SAINTE GENEVIEVE, MO 63670-0089
PO BOX 90, SAINTE GENEVIEVE, MO 63670-0090
PO BOX 91, SAINTE GENEVIEVE, MO 63670-0091
PO BOX 92, SAINTE GENEVIEVE, MO 63670-0092
PO BOX 93, SAINTE GENEVIEVE, MO 63670-0093
PO BOX 94, SAINTE GENEVIEVE, MO 63670-0094
PO BOX 95, SAINTE GENEVIEVE, MO 63670-0095
PO BOX 96, SAINTE GENEVIEVE, MO 63670-0096
PO BOX 97, SAINTE GENEVIEVE, MO 63670-0097
PO BOX 98, SAINTE GENEVIEVE, MO 63670-0098
PO BOX 99, SAINTE GENEVIEVE, MO 63670-0099
PO BOX 100, SAINTE GENEVIEVE, MO 63670-0100
PO BOX 101, SAINTE GENEVIEVE, MO 63670-0101
PO BOX 102, SAINTE GENEVIEVE, MO 63670-0102
PO BOX 103, SAINTE GENEVIEVE, MO 63670-0103
PO BOX 104, SAINTE GENEVIEVE, MO 63670-0104
PO BOX 105, SAINTE GENEVIEVE, MO 63670-0105
PO BOX 106, SAINTE GENEVIEVE, MO 63670-0106
PO BOX 107, SAINTE GENEVIEVE, MO 63670-0107
PO BOX 108, SAINTE GENEVIEVE, MO 63670-0108
PO BOX 109, SAINTE GENEVIEVE, MO 63670-0109
PO BOX 110, SAINTE GENEVIEVE, MO 63670-0110
PO BOX 111, SAINTE GENEVIEVE, MO 63670-0111
PO BOX 112, SAINTE GENEVIEVE, MO 63670-0112
PO BOX 113, SAINTE GENEVIEVE, MO 63670-0113
PO BOX 114, SAINTE GENEVIEVE, MO 63670-0114
PO BOX 115, SAINTE GENEVIEVE, MO 63670-0115
PO BOX 116, SAINTE GENEVIEVE, MO 63670-0116
PO BOX 117, SAINTE GENEVIEVE, MO 63670-0117
PO BOX 118, SAINTE GENEVIEVE, MO 63670-0118
PO BOX 119, SAINTE GENEVIEVE, MO 63670-0119
PO BOX 120, SAINTE GENEVIEVE, MO 63670-0120
PO BOX 121, SAINTE GENEVIEVE, MO 63670-0121
PO BOX 122, SAINTE GENEVIEVE, MO 63670-0122
PO BOX 123, SAINTE GENEVIEVE, MO 63670-0123
PO BOX 124, SAINTE GENEVIEVE, MO 63670-0124
PO BOX 125, SAINTE GENEVIEVE, MO 63670-0125
PO BOX 126, SAINTE GENEVIEVE, MO 63670-0126
PO BOX 127, SAINTE GENEVIEVE, MO 63670-0127
PO BOX 128, SAINTE GENEVIEVE, MO 63670-0128
PO BOX 129, SAINTE GENEVIEVE, MO 63670-0129
PO BOX 130, SAINTE GENEVIEVE, MO 63670-0130
PO BOX 131, SAINTE GENEVIEVE, MO 63670-0131
PO BOX 132, SAINTE GENEVIEVE, MO 63670-0132
PO BOX 133, SAINTE GENEVIEVE, MO 63670-0133
PO BOX 134, SAINTE GENEVIEVE, MO 63670-0134
PO BOX 135, SAINTE GENEVIEVE, MO 63670-0135
PO BOX 136, SAINTE GENEVIEVE, MO 63670-0136
PO BOX 137, SAINTE GENEVIEVE, MO 63670-0137
PO BOX 138, SAINTE GENEVIEVE, MO 63670-0138
PO BOX 139, SAINTE GENEVIEVE, MO 63670-0139
PO BOX 140, SAINTE GENEVIEVE, MO 63670-0140
PO BOX 141, SAINTE GENEVIEVE, MO 63670-0141
PO BOX 142, SAINTE GENEVIEVE, MO 63670-0142
PO BOX 143, SAINTE GENEVIEVE, MO 63670-0143
PO BOX 144, SAINTE GENEVIEVE, MO 63670-0144
PO BOX 145, SAINTE GENEVIEVE, MO 63670-0145
PO BOX 146, SAINTE GENEVIEVE, MO 63670-0146
PO BOX 147, SAINTE GENEVIEVE, MO 63670-0147
PO BOX 148, SAINTE GENEVIEVE, MO 63670-0148
PO BOX 149, SAINTE GENEVIEVE, MO 63670-0149
PO BOX 150, SAINTE GENEVIEVE, MO 63670-0150
PO BOX 151, SAINTE GENEVIEVE, MO 63670-0151
PO BOX 152, SAINTE GENEVIEVE, MO 63670-0152
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