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, CALHOUN FALLS, SC 29628-0001
PO BOX 2, CALHOUN FALLS, SC 29628-0002
PO BOX 3, CALHOUN FALLS, SC 29628-0003
PO BOX 4, CALHOUN FALLS, SC 29628-0004
PO BOX 5, CALHOUN FALLS, SC 29628-0005
PO BOX 6, CALHOUN FALLS, SC 29628-0006
PO BOX 7, CALHOUN FALLS, SC 29628-0007
PO BOX 8, CALHOUN FALLS, SC 29628-0008
PO BOX 9, CALHOUN FALLS, SC 29628-0009
PO BOX 10, CALHOUN FALLS, SC 29628-0010
PO BOX 11, CALHOUN FALLS, SC 29628-0011
PO BOX 12, CALHOUN FALLS, SC 29628-0012
PO BOX 13, CALHOUN FALLS, SC 29628-0013
PO BOX 14, CALHOUN FALLS, SC 29628-0014
PO BOX 15, CALHOUN FALLS, SC 29628-0015
PO BOX 16, CALHOUN FALLS, SC 29628-0016
PO BOX 17, CALHOUN FALLS, SC 29628-0017
PO BOX 18, CALHOUN FALLS, SC 29628-0018
PO BOX 19, CALHOUN FALLS, SC 29628-0019
PO BOX 20, CALHOUN FALLS, SC 29628-0020
PO BOX 21, CALHOUN FALLS, SC 29628-0021
PO BOX 22, CALHOUN FALLS, SC 29628-0022
PO BOX 23, CALHOUN FALLS, SC 29628-0023
PO BOX 24, CALHOUN FALLS, SC 29628-0024
PO BOX 25, CALHOUN FALLS, SC 29628-0025
PO BOX 26, CALHOUN FALLS, SC 29628-0026
PO BOX 27, CALHOUN FALLS, SC 29628-0027
PO BOX 28, CALHOUN FALLS, SC 29628-0028
PO BOX 29, CALHOUN FALLS, SC 29628-0029
PO BOX 30, CALHOUN FALLS, SC 29628-0030
PO BOX 31, CALHOUN FALLS, SC 29628-0031
PO BOX 32, CALHOUN FALLS, SC 29628-0032
PO BOX 33, CALHOUN FALLS, SC 29628-0033
PO BOX 34, CALHOUN FALLS, SC 29628-0034
PO BOX 35, CALHOUN FALLS, SC 29628-0035
PO BOX 36, CALHOUN FALLS, SC 29628-0036
PO BOX 37, CALHOUN FALLS, SC 29628-0037
PO BOX 38, CALHOUN FALLS, SC 29628-0038
PO BOX 39, CALHOUN FALLS, SC 29628-0039
PO BOX 40, CALHOUN FALLS, SC 29628-0040
PO BOX 41, CALHOUN FALLS, SC 29628-0041
PO BOX 42, CALHOUN FALLS, SC 29628-0042
PO BOX 43, CALHOUN FALLS, SC 29628-0043
PO BOX 44, CALHOUN FALLS, SC 29628-0044
PO BOX 45, CALHOUN FALLS, SC 29628-0045
PO BOX 46, CALHOUN FALLS, SC 29628-0046
PO BOX 47, CALHOUN FALLS, SC 29628-0047
PO BOX 48, CALHOUN FALLS, SC 29628-0048
PO BOX 49, CALHOUN FALLS, SC 29628-0049
PO BOX 50, CALHOUN FALLS, SC 29628-0050
PO BOX 51, CALHOUN FALLS, SC 29628-0051
PO BOX 52, CALHOUN FALLS, SC 29628-0052
PO BOX 53, CALHOUN FALLS, SC 29628-0053
PO BOX 54, CALHOUN FALLS, SC 29628-0054
PO BOX 55, CALHOUN FALLS, SC 29628-0055
PO BOX 56, CALHOUN FALLS, SC 29628-0056
PO BOX 57, CALHOUN FALLS, SC 29628-0057
PO BOX 58, CALHOUN FALLS, SC 29628-0058
PO BOX 59, CALHOUN FALLS, SC 29628-0059
PO BOX 60, CALHOUN FALLS, SC 29628-0060
PO BOX 61, CALHOUN FALLS, SC 29628-0061
PO BOX 62, CALHOUN FALLS, SC 29628-0062
PO BOX 63, CALHOUN FALLS, SC 29628-0063
PO BOX 64, CALHOUN FALLS, SC 29628-0064
PO BOX 65, CALHOUN FALLS, SC 29628-0065
PO BOX 66, CALHOUN FALLS, SC 29628-0066
PO BOX 67, CALHOUN FALLS, SC 29628-0067
PO BOX 68, CALHOUN FALLS, SC 29628-0068
PO BOX 69, CALHOUN FALLS, SC 29628-0069
PO BOX 70, CALHOUN FALLS, SC 29628-0070
PO BOX 71, CALHOUN FALLS, SC 29628-0071
PO BOX 72, CALHOUN FALLS, SC 29628-0072
PO BOX 73, CALHOUN FALLS, SC 29628-0073
PO BOX 74, CALHOUN FALLS, SC 29628-0074
PO BOX 75, CALHOUN FALLS, SC 29628-0075
PO BOX 76, CALHOUN FALLS, SC 29628-0076
PO BOX 77, CALHOUN FALLS, SC 29628-0077
PO BOX 78, CALHOUN FALLS, SC 29628-0078
PO BOX 79, CALHOUN FALLS, SC 29628-0079
PO BOX 80, CALHOUN FALLS, SC 29628-0080
PO BOX 81, CALHOUN FALLS, SC 29628-0081
PO BOX 82, CALHOUN FALLS, SC 29628-0082
PO BOX 83, CALHOUN FALLS, SC 29628-0083
PO BOX 84, CALHOUN FALLS, SC 29628-0084
PO BOX 85, CALHOUN FALLS, SC 29628-0085
PO BOX 86, CALHOUN FALLS, SC 29628-0086
PO BOX 87, CALHOUN FALLS, SC 29628-0087
PO BOX 88, CALHOUN FALLS, SC 29628-0088
PO BOX 89, CALHOUN FALLS, SC 29628-0089
PO BOX 90, CALHOUN FALLS, SC 29628-0090
PO BOX 91, CALHOUN FALLS, SC 29628-0091
PO BOX 92, CALHOUN FALLS, SC 29628-0092
PO BOX 93, CALHOUN FALLS, SC 29628-0093
PO BOX 94, CALHOUN FALLS, SC 29628-0094
PO BOX 95, CALHOUN FALLS, SC 29628-0095
PO BOX 96, CALHOUN FALLS, SC 29628-0096
PO BOX 97, CALHOUN FALLS, SC 29628-0097
PO BOX 98, CALHOUN FALLS, SC 29628-0098
PO BOX 99, CALHOUN FALLS, SC 29628-0099
PO BOX 100, CALHOUN FALLS, SC 29628-0100
PO BOX 101, CALHOUN FALLS, SC 29628-0101
PO BOX 102, CALHOUN FALLS, SC 29628-0102
PO BOX 103, CALHOUN FALLS, SC 29628-0103
PO BOX 104, CALHOUN FALLS, SC 29628-0104
PO BOX 105, CALHOUN FALLS, SC 29628-0105
PO BOX 106, CALHOUN FALLS, SC 29628-0106
PO BOX 107, CALHOUN FALLS, SC 29628-0107
PO BOX 108, CALHOUN FALLS, SC 29628-0108
PO BOX 109, CALHOUN FALLS, SC 29628-0109
PO BOX 110, CALHOUN FALLS, SC 29628-0110
PO BOX 111, CALHOUN FALLS, SC 29628-0111
PO BOX 112, CALHOUN FALLS, SC 29628-0112
PO BOX 113, CALHOUN FALLS, SC 29628-0113
PO BOX 114, CALHOUN FALLS, SC 29628-0114
PO BOX 115, CALHOUN FALLS, SC 29628-0115
PO BOX 116, CALHOUN FALLS, SC 29628-0116
PO BOX 117, CALHOUN FALLS, SC 29628-0117
PO BOX 118, CALHOUN FALLS, SC 29628-0118
PO BOX 119, CALHOUN FALLS, SC 29628-0119
PO BOX 120, CALHOUN FALLS, SC 29628-0120
PO BOX 121, CALHOUN FALLS, SC 29628-0121
PO BOX 122, CALHOUN FALLS, SC 29628-0122
PO BOX 123, CALHOUN FALLS, SC 29628-0123
PO BOX 124, CALHOUN FALLS, SC 29628-0124
PO BOX 125, CALHOUN FALLS, SC 29628-0125
PO BOX 126, CALHOUN FALLS, SC 29628-0126
PO BOX 127, CALHOUN FALLS, SC 29628-0127
PO BOX 128, CALHOUN FALLS, SC 29628-0128
PO BOX 129, CALHOUN FALLS, SC 29628-0129
PO BOX 130, CALHOUN FALLS, SC 29628-0130
PO BOX 131, CALHOUN FALLS, SC 29628-0131
PO BOX 132, CALHOUN FALLS, SC 29628-0132
PO BOX 133, CALHOUN FALLS, SC 29628-0133
PO BOX 134, CALHOUN FALLS, SC 29628-0134
PO BOX 135, CALHOUN FALLS, SC 29628-0135
PO BOX 136, CALHOUN FALLS, SC 29628-0136
PO BOX 137, CALHOUN FALLS, SC 29628-0137
PO BOX 138, CALHOUN FALLS, SC 29628-0138
PO BOX 139, CALHOUN FALLS, SC 29628-0139
PO BOX 140, CALHOUN FALLS, SC 29628-0140
PO BOX 141, CALHOUN FALLS, SC 29628-0141
PO BOX 142, CALHOUN FALLS, SC 29628-0142
PO BOX 143, CALHOUN FALLS, SC 29628-0143
PO BOX 144, CALHOUN FALLS, SC 29628-0144
PO BOX 145, CALHOUN FALLS, SC 29628-0145
PO BOX 146, CALHOUN FALLS, SC 29628-0146
PO BOX 147, CALHOUN FALLS, SC 29628-0147
PO BOX 148, CALHOUN FALLS, SC 29628-0148
PO BOX 149, CALHOUN FALLS, SC 29628-0149
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