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, CAMP SHERMAN, OR 97730-0001
PO BOX 2, CAMP SHERMAN, OR 97730-0002
PO BOX 3, CAMP SHERMAN, OR 97730-0003
PO BOX 4, CAMP SHERMAN, OR 97730-0004
PO BOX 5, CAMP SHERMAN, OR 97730-0005
PO BOX 6, CAMP SHERMAN, OR 97730-0006
PO BOX 7, CAMP SHERMAN, OR 97730-0007
PO BOX 8, CAMP SHERMAN, OR 97730-0008
PO BOX 9, CAMP SHERMAN, OR 97730-0009
PO BOX 10, CAMP SHERMAN, OR 97730-0010
PO BOX 11, CAMP SHERMAN, OR 97730-0011
PO BOX 12, CAMP SHERMAN, OR 97730-0012
PO BOX 13, CAMP SHERMAN, OR 97730-0013
PO BOX 14, CAMP SHERMAN, OR 97730-0014
PO BOX 15, CAMP SHERMAN, OR 97730-0015
PO BOX 16, CAMP SHERMAN, OR 97730-0016
PO BOX 17, CAMP SHERMAN, OR 97730-0017
PO BOX 18, CAMP SHERMAN, OR 97730-0018
PO BOX 19, CAMP SHERMAN, OR 97730-0019
PO BOX 20, CAMP SHERMAN, OR 97730-0020
PO BOX 21, CAMP SHERMAN, OR 97730-0021
PO BOX 22, CAMP SHERMAN, OR 97730-0022
PO BOX 23, CAMP SHERMAN, OR 97730-0023
PO BOX 24, CAMP SHERMAN, OR 97730-0024
PO BOX 25, CAMP SHERMAN, OR 97730-0025
PO BOX 26, CAMP SHERMAN, OR 97730-0026
PO BOX 27, CAMP SHERMAN, OR 97730-0027
PO BOX 28, CAMP SHERMAN, OR 97730-0028
PO BOX 29, CAMP SHERMAN, OR 97730-0029
PO BOX 30, CAMP SHERMAN, OR 97730-0030
PO BOX 31, CAMP SHERMAN, OR 97730-0031
PO BOX 32, CAMP SHERMAN, OR 97730-0032
PO BOX 33, CAMP SHERMAN, OR 97730-0033
PO BOX 34, CAMP SHERMAN, OR 97730-0034
PO BOX 35, CAMP SHERMAN, OR 97730-0035
PO BOX 36, CAMP SHERMAN, OR 97730-0036
PO BOX 37, CAMP SHERMAN, OR 97730-0037
PO BOX 38, CAMP SHERMAN, OR 97730-0038
PO BOX 39, CAMP SHERMAN, OR 97730-0039
PO BOX 40, CAMP SHERMAN, OR 97730-0040
PO BOX 41, CAMP SHERMAN, OR 97730-0041
PO BOX 42, CAMP SHERMAN, OR 97730-0042
PO BOX 43, CAMP SHERMAN, OR 97730-0043
PO BOX 44, CAMP SHERMAN, OR 97730-0044
PO BOX 45, CAMP SHERMAN, OR 97730-0045
PO BOX 46, CAMP SHERMAN, OR 97730-0046
PO BOX 47, CAMP SHERMAN, OR 97730-0047
PO BOX 48, CAMP SHERMAN, OR 97730-0048
PO BOX 49, CAMP SHERMAN, OR 97730-0049
PO BOX 50, CAMP SHERMAN, OR 97730-0050
PO BOX 51, CAMP SHERMAN, OR 97730-0051
PO BOX 52, CAMP SHERMAN, OR 97730-0052
PO BOX 53, CAMP SHERMAN, OR 97730-0053
PO BOX 54, CAMP SHERMAN, OR 97730-0054
PO BOX 55, CAMP SHERMAN, OR 97730-0055
PO BOX 56, CAMP SHERMAN, OR 97730-0056
PO BOX 57, CAMP SHERMAN, OR 97730-0057
PO BOX 58, CAMP SHERMAN, OR 97730-0058
PO BOX 59, CAMP SHERMAN, OR 97730-0059
PO BOX 60, CAMP SHERMAN, OR 97730-0060
PO BOX 61, CAMP SHERMAN, OR 97730-0061
PO BOX 62, CAMP SHERMAN, OR 97730-0062
PO BOX 63, CAMP SHERMAN, OR 97730-0063
PO BOX 64, CAMP SHERMAN, OR 97730-0064
PO BOX 65, CAMP SHERMAN, OR 97730-0065
PO BOX 66, CAMP SHERMAN, OR 97730-0066
PO BOX 67, CAMP SHERMAN, OR 97730-0067
PO BOX 68, CAMP SHERMAN, OR 97730-0068
PO BOX 69, CAMP SHERMAN, OR 97730-0069
PO BOX 70, CAMP SHERMAN, OR 97730-0070
PO BOX 71, CAMP SHERMAN, OR 97730-0071
PO BOX 72, CAMP SHERMAN, OR 97730-0072
PO BOX 73, CAMP SHERMAN, OR 97730-0073
PO BOX 74, CAMP SHERMAN, OR 97730-0074
PO BOX 75, CAMP SHERMAN, OR 97730-0075
PO BOX 76, CAMP SHERMAN, OR 97730-0076
PO BOX 77, CAMP SHERMAN, OR 97730-0077
PO BOX 78, CAMP SHERMAN, OR 97730-0078
PO BOX 79, CAMP SHERMAN, OR 97730-0079
PO BOX 80, CAMP SHERMAN, OR 97730-0080
PO BOX 81, CAMP SHERMAN, OR 97730-0081
PO BOX 82, CAMP SHERMAN, OR 97730-0082
PO BOX 83, CAMP SHERMAN, OR 97730-0083
PO BOX 84, CAMP SHERMAN, OR 97730-0084
PO BOX 85, CAMP SHERMAN, OR 97730-0085
PO BOX 86, CAMP SHERMAN, OR 97730-0086
PO BOX 87, CAMP SHERMAN, OR 97730-0087
PO BOX 88, CAMP SHERMAN, OR 97730-0088
PO BOX 89, CAMP SHERMAN, OR 97730-0089
PO BOX 90, CAMP SHERMAN, OR 97730-0090
PO BOX 91, CAMP SHERMAN, OR 97730-0091
PO BOX 92, CAMP SHERMAN, OR 97730-0092
PO BOX 93, CAMP SHERMAN, OR 97730-0093
PO BOX 94, CAMP SHERMAN, OR 97730-0094
PO BOX 95, CAMP SHERMAN, OR 97730-0095
PO BOX 96, CAMP SHERMAN, OR 97730-0096
PO BOX 97, CAMP SHERMAN, OR 97730-0097
PO BOX 98, CAMP SHERMAN, OR 97730-0098
PO BOX 99, CAMP SHERMAN, OR 97730-0099
PO BOX 100, CAMP SHERMAN, OR 97730-0100
PO BOX 101, CAMP SHERMAN, OR 97730-0101
PO BOX 102, CAMP SHERMAN, OR 97730-0102
PO BOX 103, CAMP SHERMAN, OR 97730-0103
PO BOX 104, CAMP SHERMAN, OR 97730-0104
PO BOX 105, CAMP SHERMAN, OR 97730-0105
PO BOX 106, CAMP SHERMAN, OR 97730-0106
PO BOX 107, CAMP SHERMAN, OR 97730-0107
PO BOX 108, CAMP SHERMAN, OR 97730-0108
PO BOX 109, CAMP SHERMAN, OR 97730-0109
PO BOX 110, CAMP SHERMAN, OR 97730-0110
PO BOX 111, CAMP SHERMAN, OR 97730-0111
PO BOX 112, CAMP SHERMAN, OR 97730-0112
PO BOX 113, CAMP SHERMAN, OR 97730-0113
PO BOX 114, CAMP SHERMAN, OR 97730-0114
PO BOX 115, CAMP SHERMAN, OR 97730-0115
PO BOX 116, CAMP SHERMAN, OR 97730-0116
PO BOX 117, CAMP SHERMAN, OR 97730-0117
PO BOX 118, CAMP SHERMAN, OR 97730-0118
PO BOX 119, CAMP SHERMAN, OR 97730-0119
PO BOX 120, CAMP SHERMAN, OR 97730-0120
PO BOX 121, CAMP SHERMAN, OR 97730-0121
PO BOX 122, CAMP SHERMAN, OR 97730-0122
PO BOX 123, CAMP SHERMAN, OR 97730-0123
PO BOX 124, CAMP SHERMAN, OR 97730-0124
PO BOX 125, CAMP SHERMAN, OR 97730-0125
PO BOX 126, CAMP SHERMAN, OR 97730-0126
PO BOX 127, CAMP SHERMAN, OR 97730-0127
PO BOX 128, CAMP SHERMAN, OR 97730-0128
PO BOX 129, CAMP SHERMAN, OR 97730-0129
PO BOX 130, CAMP SHERMAN, OR 97730-0130
PO BOX 131, CAMP SHERMAN, OR 97730-0131
PO BOX 132, CAMP SHERMAN, OR 97730-0132
PO BOX 133, CAMP SHERMAN, OR 97730-0133
PO BOX 134, CAMP SHERMAN, OR 97730-0134
PO BOX 135, CAMP SHERMAN, OR 97730-0135
PO BOX 136, CAMP SHERMAN, OR 97730-0136
PO BOX 137, CAMP SHERMAN, OR 97730-0137
PO BOX 138, CAMP SHERMAN, OR 97730-0138
PO BOX 139, CAMP SHERMAN, OR 97730-0139
PO BOX 140, CAMP SHERMAN, OR 97730-0140
PO BOX 141, CAMP SHERMAN, OR 97730-0141
PO BOX 142, CAMP SHERMAN, OR 97730-0142
PO BOX 143, CAMP SHERMAN, OR 97730-0143
PO BOX 144, CAMP SHERMAN, OR 97730-0144
PO BOX 145, CAMP SHERMAN, OR 97730-0145
PO BOX 146, CAMP SHERMAN, OR 97730-0146
PO BOX 147, CAMP SHERMAN, OR 97730-0147
PO BOX 148, CAMP SHERMAN, OR 97730-0148
PO BOX 149, CAMP SHERMAN, OR 97730-0149
PO BOX 150, CAMP SHERMAN, OR 97730-0150
PO BOX 151, CAMP SHERMAN, OR 97730-0151
PO BOX 152, CAMP SHERMAN, OR 97730-0152
PO BOX 153, CAMP SHERMAN, OR 97730-0153
PO BOX 154, CAMP SHERMAN, OR 97730-0154
PO BOX 155, CAMP SHERMAN, OR 97730-0155
PO BOX 156, CAMP SHERMAN, OR 97730-0156
PO BOX 157, CAMP SHERMAN, OR 97730-0157
PO BOX 158, CAMP SHERMAN, OR 97730-0158
PO BOX 159, CAMP SHERMAN, OR 97730-0159
PO BOX 160, CAMP SHERMAN, OR 97730-0160
PO BOX 161, CAMP SHERMAN, OR 97730-0161
PO BOX 162, CAMP SHERMAN, OR 97730-0162
PO BOX 163, CAMP SHERMAN, OR 97730-0163
PO BOX 164, CAMP SHERMAN, OR 97730-0164
PO BOX 165, CAMP SHERMAN, OR 97730-0165
PO BOX 166, CAMP SHERMAN, OR 97730-0166
PO BOX 167, CAMP SHERMAN, OR 97730-0167
PO BOX 168, CAMP SHERMAN, OR 97730-0168
PO BOX 169, CAMP SHERMAN, OR 97730-0169
PO BOX 170, CAMP SHERMAN, OR 97730-0170
PO BOX 171, CAMP SHERMAN, OR 97730-0171
PO BOX 172, CAMP SHERMAN, OR 97730-0172
PO BOX 173, CAMP SHERMAN, OR 97730-0173
PO BOX 174, CAMP SHERMAN, OR 97730-0174
PO BOX 175, CAMP SHERMAN, OR 97730-0175
PO BOX 176, CAMP SHERMAN, OR 97730-0176
PO BOX 177, CAMP SHERMAN, OR 97730-0177
PO BOX 178, CAMP SHERMAN, OR 97730-0178
PO BOX 179, CAMP SHERMAN, OR 97730-0179
PO BOX 180, CAMP SHERMAN, OR 97730-0180
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