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 11, CHARLOTTESVILLE, VA 22902-0011
PO BOX 12, CHARLOTTESVILLE, VA 22902-0012
PO BOX 13, CHARLOTTESVILLE, VA 22902-0013
PO BOX 14, CHARLOTTESVILLE, VA 22902-0014
PO BOX 15, CHARLOTTESVILLE, VA 22902-0015
PO BOX 16, CHARLOTTESVILLE, VA 22902-0016
PO BOX 17, CHARLOTTESVILLE, VA 22902-0017
PO BOX 18, CHARLOTTESVILLE, VA 22902-0018
PO BOX 19, CHARLOTTESVILLE, VA 22902-0019
PO BOX 20, CHARLOTTESVILLE, VA 22902-0020
PO BOX 21, CHARLOTTESVILLE, VA 22902-0021
PO BOX 22, CHARLOTTESVILLE, VA 22902-0022
PO BOX 23, CHARLOTTESVILLE, VA 22902-0023
PO BOX 24, CHARLOTTESVILLE, VA 22902-0024
PO BOX 25, CHARLOTTESVILLE, VA 22902-0025
PO BOX 26, CHARLOTTESVILLE, VA 22902-0026
PO BOX 27, CHARLOTTESVILLE, VA 22902-0027
PO BOX 28, CHARLOTTESVILLE, VA 22902-0028
PO BOX 29, CHARLOTTESVILLE, VA 22902-0029
PO BOX 30, CHARLOTTESVILLE, VA 22902-0030
PO BOX 31, CHARLOTTESVILLE, VA 22902-0031
PO BOX 32, CHARLOTTESVILLE, VA 22902-0032
PO BOX 33, CHARLOTTESVILLE, VA 22902-0033
PO BOX 34, CHARLOTTESVILLE, VA 22902-0034
PO BOX 35, CHARLOTTESVILLE, VA 22902-0035
PO BOX 36, CHARLOTTESVILLE, VA 22902-0036
PO BOX 37, CHARLOTTESVILLE, VA 22902-0037
PO BOX 38, CHARLOTTESVILLE, VA 22902-0038
PO BOX 39, CHARLOTTESVILLE, VA 22902-0039
PO BOX 40, CHARLOTTESVILLE, VA 22902-0040
PO BOX 41, CHARLOTTESVILLE, VA 22902-0041
PO BOX 42, CHARLOTTESVILLE, VA 22902-0042
PO BOX 43, CHARLOTTESVILLE, VA 22902-0043
PO BOX 44, CHARLOTTESVILLE, VA 22902-0044
PO BOX 45, CHARLOTTESVILLE, VA 22902-0045
PO BOX 46, CHARLOTTESVILLE, VA 22902-0046
PO BOX 47, CHARLOTTESVILLE, VA 22902-0047
PO BOX 48, CHARLOTTESVILLE, VA 22902-0048
PO BOX 49, CHARLOTTESVILLE, VA 22902-0049
PO BOX 50, CHARLOTTESVILLE, VA 22902-0050
PO BOX 51, CHARLOTTESVILLE, VA 22902-0051
PO BOX 52, CHARLOTTESVILLE, VA 22902-0052
PO BOX 53, CHARLOTTESVILLE, VA 22902-0053
PO BOX 54, CHARLOTTESVILLE, VA 22902-0054
PO BOX 55, CHARLOTTESVILLE, VA 22902-0055
PO BOX 56, CHARLOTTESVILLE, VA 22902-0056
PO BOX 57, CHARLOTTESVILLE, VA 22902-0057
PO BOX 58, CHARLOTTESVILLE, VA 22902-0058
PO BOX 59, CHARLOTTESVILLE, VA 22902-0059
PO BOX 60, CHARLOTTESVILLE, VA 22902-0060
PO BOX 61, CHARLOTTESVILLE, VA 22902-0061
PO BOX 62, CHARLOTTESVILLE, VA 22902-0062
PO BOX 63, CHARLOTTESVILLE, VA 22902-0063
PO BOX 64, CHARLOTTESVILLE, VA 22902-0064
PO BOX 65, CHARLOTTESVILLE, VA 22902-0065
PO BOX 66, CHARLOTTESVILLE, VA 22902-0066
PO BOX 67, CHARLOTTESVILLE, VA 22902-0067
PO BOX 68, CHARLOTTESVILLE, VA 22902-0068
PO BOX 69, CHARLOTTESVILLE, VA 22902-0069
PO BOX 70, CHARLOTTESVILLE, VA 22902-0070
PO BOX 71, CHARLOTTESVILLE, VA 22902-0071
PO BOX 72, CHARLOTTESVILLE, VA 22902-0072
PO BOX 73, CHARLOTTESVILLE, VA 22902-0073
PO BOX 74, CHARLOTTESVILLE, VA 22902-0074
PO BOX 75, CHARLOTTESVILLE, VA 22902-0075
PO BOX 76, CHARLOTTESVILLE, VA 22902-0076
PO BOX 77, CHARLOTTESVILLE, VA 22902-0077
PO BOX 78, CHARLOTTESVILLE, VA 22902-0078
PO BOX 79, CHARLOTTESVILLE, VA 22902-0079
PO BOX 80, CHARLOTTESVILLE, VA 22902-0080
PO BOX 81, CHARLOTTESVILLE, VA 22902-0081
PO BOX 82, CHARLOTTESVILLE, VA 22902-0082
PO BOX 83, CHARLOTTESVILLE, VA 22902-0083
PO BOX 84, CHARLOTTESVILLE, VA 22902-0084
PO BOX 85, CHARLOTTESVILLE, VA 22902-0085
PO BOX 86, CHARLOTTESVILLE, VA 22902-0086
PO BOX 87, CHARLOTTESVILLE, VA 22902-0087
PO BOX 88, CHARLOTTESVILLE, VA 22902-0088
PO BOX 89, CHARLOTTESVILLE, VA 22902-0089
PO BOX 90, CHARLOTTESVILLE, VA 22902-0090
PO BOX 91, CHARLOTTESVILLE, VA 22902-0091
PO BOX 92, CHARLOTTESVILLE, VA 22902-0092
PO BOX 93, CHARLOTTESVILLE, VA 22902-0093
PO BOX 94, CHARLOTTESVILLE, VA 22902-0094
PO BOX 95, CHARLOTTESVILLE, VA 22902-0095
PO BOX 96, CHARLOTTESVILLE, VA 22902-0096
PO BOX 97, CHARLOTTESVILLE, VA 22902-0097
PO BOX 98, CHARLOTTESVILLE, VA 22902-0098
PO BOX 99, CHARLOTTESVILLE, VA 22902-0099
PO BOX 100, CHARLOTTESVILLE, VA 22902-0100
PO BOX 101, CHARLOTTESVILLE, VA 22902-0101
PO BOX 102, CHARLOTTESVILLE, VA 22902-0102
PO BOX 103, CHARLOTTESVILLE, VA 22902-0103
PO BOX 104, CHARLOTTESVILLE, VA 22902-0104
PO BOX 105, CHARLOTTESVILLE, VA 22902-0105
PO BOX 106, CHARLOTTESVILLE, VA 22902-0106
PO BOX 107, CHARLOTTESVILLE, VA 22902-0107
PO BOX 108, CHARLOTTESVILLE, VA 22902-0108
PO BOX 109, CHARLOTTESVILLE, VA 22902-0109
PO BOX 110, CHARLOTTESVILLE, VA 22902-0110
PO BOX 111, CHARLOTTESVILLE, VA 22902-0111
PO BOX 112, CHARLOTTESVILLE, VA 22902-0112
PO BOX 113, CHARLOTTESVILLE, VA 22902-0113
PO BOX 114, CHARLOTTESVILLE, VA 22902-0114
PO BOX 115, CHARLOTTESVILLE, VA 22902-0115
PO BOX 116, CHARLOTTESVILLE, VA 22902-0116
PO BOX 117, CHARLOTTESVILLE, VA 22902-0117
PO BOX 118, CHARLOTTESVILLE, VA 22902-0118
PO BOX 119, CHARLOTTESVILLE, VA 22902-0119
PO BOX 120, CHARLOTTESVILLE, VA 22902-0120
PO BOX 121, CHARLOTTESVILLE, VA 22902-0121
PO BOX 122, CHARLOTTESVILLE, VA 22902-0122
PO BOX 123, CHARLOTTESVILLE, VA 22902-0123
PO BOX 124, CHARLOTTESVILLE, VA 22902-0124
PO BOX 125, CHARLOTTESVILLE, VA 22902-0125
PO BOX 126, CHARLOTTESVILLE, VA 22902-0126
PO BOX 127, CHARLOTTESVILLE, VA 22902-0127
PO BOX 128, CHARLOTTESVILLE, VA 22902-0128
PO BOX 129, CHARLOTTESVILLE, VA 22902-0129
PO BOX 130, CHARLOTTESVILLE, VA 22902-0130
PO BOX 131, CHARLOTTESVILLE, VA 22902-0131
PO BOX 132, CHARLOTTESVILLE, VA 22902-0132
PO BOX 133, CHARLOTTESVILLE, VA 22902-0133
PO BOX 134, CHARLOTTESVILLE, VA 22902-0134
PO BOX 135, CHARLOTTESVILLE, VA 22902-0135
PO BOX 136, CHARLOTTESVILLE, VA 22902-0136
PO BOX 137, CHARLOTTESVILLE, VA 22902-0137
PO BOX 138, CHARLOTTESVILLE, VA 22902-0138
PO BOX 139, CHARLOTTESVILLE, VA 22902-0139
PO BOX 140, CHARLOTTESVILLE, VA 22902-0140
PO BOX 141, CHARLOTTESVILLE, VA 22902-0141
PO BOX 142, CHARLOTTESVILLE, VA 22902-0142
PO BOX 143, CHARLOTTESVILLE, VA 22902-0143
PO BOX 144, CHARLOTTESVILLE, VA 22902-0144
PO BOX 145, CHARLOTTESVILLE, VA 22902-0145
PO BOX 146, CHARLOTTESVILLE, VA 22902-0146
PO BOX 147, CHARLOTTESVILLE, VA 22902-0147
PO BOX 148, CHARLOTTESVILLE, VA 22902-0148
PO BOX 149, CHARLOTTESVILLE, VA 22902-0149
PO BOX 150, CHARLOTTESVILLE, VA 22902-0150
PO BOX 151, CHARLOTTESVILLE, VA 22902-0151
PO BOX 152, CHARLOTTESVILLE, VA 22902-0152
PO BOX 153, CHARLOTTESVILLE, VA 22902-0153
PO BOX 154, CHARLOTTESVILLE, VA 22902-0154
PO BOX 155, CHARLOTTESVILLE, VA 22902-0155
PO BOX 156, CHARLOTTESVILLE, VA 22902-0156
PO BOX 157, CHARLOTTESVILLE, VA 22902-0157
PO BOX 158, CHARLOTTESVILLE, VA 22902-0158
PO BOX 159, CHARLOTTESVILLE, VA 22902-0159
PO BOX 160, CHARLOTTESVILLE, VA 22902-0160
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