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, GREENWOOD, SC 29648-0001
PO BOX 2, GREENWOOD, SC 29648-0002
PO BOX 3, GREENWOOD, SC 29648-0003
PO BOX 4, GREENWOOD, SC 29648-0004
PO BOX 5, GREENWOOD, SC 29648-0005
PO BOX 6, GREENWOOD, SC 29648-0006
PO BOX 7, GREENWOOD, SC 29648-0007
PO BOX 8, GREENWOOD, SC 29648-0008
PO BOX 9, GREENWOOD, SC 29648-0009
PO BOX 10, GREENWOOD, SC 29648-0010
PO BOX 11, GREENWOOD, SC 29648-0011
PO BOX 12, GREENWOOD, SC 29648-0012
PO BOX 13, GREENWOOD, SC 29648-0013
PO BOX 14, GREENWOOD, SC 29648-0014
PO BOX 15, GREENWOOD, SC 29648-0015
PO BOX 16, GREENWOOD, SC 29648-0016
PO BOX 17, GREENWOOD, SC 29648-0017
PO BOX 18, GREENWOOD, SC 29648-0018
PO BOX 19, GREENWOOD, SC 29648-0019
PO BOX 20, GREENWOOD, SC 29648-0020
PO BOX 21, GREENWOOD, SC 29648-0021
PO BOX 22, GREENWOOD, SC 29648-0022
PO BOX 23, GREENWOOD, SC 29648-0023
PO BOX 24, GREENWOOD, SC 29648-0024
PO BOX 25, GREENWOOD, SC 29648-0025
PO BOX 26, GREENWOOD, SC 29648-0026
PO BOX 27, GREENWOOD, SC 29648-0027
PO BOX 28, GREENWOOD, SC 29648-0028
PO BOX 29, GREENWOOD, SC 29648-0029
PO BOX 30, GREENWOOD, SC 29648-0030
PO BOX 31, GREENWOOD, SC 29648-0031
PO BOX 32, GREENWOOD, SC 29648-0032
PO BOX 33, GREENWOOD, SC 29648-0033
PO BOX 34, GREENWOOD, SC 29648-0034
PO BOX 35, GREENWOOD, SC 29648-0035
PO BOX 36, GREENWOOD, SC 29648-0036
PO BOX 37, GREENWOOD, SC 29648-0037
PO BOX 38, GREENWOOD, SC 29648-0038
PO BOX 39, GREENWOOD, SC 29648-0039
PO BOX 40, GREENWOOD, SC 29648-0040
PO BOX 41, GREENWOOD, SC 29648-0041
PO BOX 42, GREENWOOD, SC 29648-0042
PO BOX 43, GREENWOOD, SC 29648-0043
PO BOX 44, GREENWOOD, SC 29648-0044
PO BOX 45, GREENWOOD, SC 29648-0045
PO BOX 46, GREENWOOD, SC 29648-0046
PO BOX 47, GREENWOOD, SC 29648-0047
PO BOX 48, GREENWOOD, SC 29648-0048
PO BOX 49, GREENWOOD, SC 29648-0049
PO BOX 50, GREENWOOD, SC 29648-0050
PO BOX 51, GREENWOOD, SC 29648-0051
PO BOX 52, GREENWOOD, SC 29648-0052
PO BOX 53, GREENWOOD, SC 29648-0053
PO BOX 54, GREENWOOD, SC 29648-0054
PO BOX 55, GREENWOOD, SC 29648-0055
PO BOX 56, GREENWOOD, SC 29648-0056
PO BOX 57, GREENWOOD, SC 29648-0057
PO BOX 58, GREENWOOD, SC 29648-0058
PO BOX 59, GREENWOOD, SC 29648-0059
PO BOX 60, GREENWOOD, SC 29648-0060
PO BOX 61, GREENWOOD, SC 29648-0061
PO BOX 62, GREENWOOD, SC 29648-0062
PO BOX 63, GREENWOOD, SC 29648-0063
PO BOX 64, GREENWOOD, SC 29648-0064
PO BOX 65, GREENWOOD, SC 29648-0065
PO BOX 66, GREENWOOD, SC 29648-0066
PO BOX 67, GREENWOOD, SC 29648-0067
PO BOX 68, GREENWOOD, SC 29648-0068
PO BOX 69, GREENWOOD, SC 29648-0069
PO BOX 70, GREENWOOD, SC 29648-0070
PO BOX 71, GREENWOOD, SC 29648-0071
PO BOX 72, GREENWOOD, SC 29648-0072
PO BOX 73, GREENWOOD, SC 29648-0073
PO BOX 74, GREENWOOD, SC 29648-0074
PO BOX 75, GREENWOOD, SC 29648-0075
PO BOX 76, GREENWOOD, SC 29648-0076
PO BOX 77, GREENWOOD, SC 29648-0077
PO BOX 78, GREENWOOD, SC 29648-0078
PO BOX 79, GREENWOOD, SC 29648-0079
PO BOX 80, GREENWOOD, SC 29648-0080
PO BOX 81, GREENWOOD, SC 29648-0081
PO BOX 82, GREENWOOD, SC 29648-0082
PO BOX 83, GREENWOOD, SC 29648-0083
PO BOX 84, GREENWOOD, SC 29648-0084
PO BOX 85, GREENWOOD, SC 29648-0085
PO BOX 86, GREENWOOD, SC 29648-0086
PO BOX 87, GREENWOOD, SC 29648-0087
PO BOX 88, GREENWOOD, SC 29648-0088
PO BOX 89, GREENWOOD, SC 29648-0089
PO BOX 90, GREENWOOD, SC 29648-0090
PO BOX 91, GREENWOOD, SC 29648-0091
PO BOX 92, GREENWOOD, SC 29648-0092
PO BOX 93, GREENWOOD, SC 29648-0093
PO BOX 94, GREENWOOD, SC 29648-0094
PO BOX 95, GREENWOOD, SC 29648-0095
PO BOX 96, GREENWOOD, SC 29648-0096
PO BOX 97, GREENWOOD, SC 29648-0097
PO BOX 98, GREENWOOD, SC 29648-0098
PO BOX 99, GREENWOOD, SC 29648-0099
PO BOX 100, GREENWOOD, SC 29648-0100
PO BOX 101, GREENWOOD, SC 29648-0101
PO BOX 102, GREENWOOD, SC 29648-0102
PO BOX 103, GREENWOOD, SC 29648-0103
PO BOX 104, GREENWOOD, SC 29648-0104
PO BOX 105, GREENWOOD, SC 29648-0105
PO BOX 106, GREENWOOD, SC 29648-0106
PO BOX 107, GREENWOOD, SC 29648-0107
PO BOX 108, GREENWOOD, SC 29648-0108
PO BOX 109, GREENWOOD, SC 29648-0109
PO BOX 110, GREENWOOD, SC 29648-0110
PO BOX 111, GREENWOOD, SC 29648-0111
PO BOX 112, GREENWOOD, SC 29648-0112
PO BOX 113, GREENWOOD, SC 29648-0113
PO BOX 114, GREENWOOD, SC 29648-0114
PO BOX 115, GREENWOOD, SC 29648-0115
PO BOX 116, GREENWOOD, SC 29648-0116
PO BOX 117, GREENWOOD, SC 29648-0117
PO BOX 118, GREENWOOD, SC 29648-0118
PO BOX 119, GREENWOOD, SC 29648-0119
PO BOX 120, GREENWOOD, SC 29648-0120
PO BOX 121, GREENWOOD, SC 29648-0121
PO BOX 122, GREENWOOD, SC 29648-0122
PO BOX 123, GREENWOOD, SC 29648-0123
PO BOX 124, GREENWOOD, SC 29648-0124
PO BOX 125, GREENWOOD, SC 29648-0125
PO BOX 126, GREENWOOD, SC 29648-0126
PO BOX 127, GREENWOOD, SC 29648-0127
PO BOX 128, GREENWOOD, SC 29648-0128
PO BOX 129, GREENWOOD, SC 29648-0129
PO BOX 130, GREENWOOD, SC 29648-0130
PO BOX 131, GREENWOOD, SC 29648-0131
PO BOX 132, GREENWOOD, SC 29648-0132
PO BOX 133, GREENWOOD, SC 29648-0133
PO BOX 134, GREENWOOD, SC 29648-0134
PO BOX 135, GREENWOOD, SC 29648-0135
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