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, CHARLOTTE, TX 78011-0001
PO BOX 2, CHARLOTTE, TX 78011-0002
PO BOX 3, CHARLOTTE, TX 78011-0003
PO BOX 4, CHARLOTTE, TX 78011-0004
PO BOX 5, CHARLOTTE, TX 78011-0005
PO BOX 6, CHARLOTTE, TX 78011-0006
PO BOX 7, CHARLOTTE, TX 78011-0007
PO BOX 8, CHARLOTTE, TX 78011-0008
PO BOX 9, CHARLOTTE, TX 78011-0009
PO BOX 10, CHARLOTTE, TX 78011-0010
PO BOX 11, CHARLOTTE, TX 78011-0011
PO BOX 12, CHARLOTTE, TX 78011-0012
PO BOX 13, CHARLOTTE, TX 78011-0013
PO BOX 14, CHARLOTTE, TX 78011-0014
PO BOX 15, CHARLOTTE, TX 78011-0015
PO BOX 16, CHARLOTTE, TX 78011-0016
PO BOX 17, CHARLOTTE, TX 78011-0017
PO BOX 18, CHARLOTTE, TX 78011-0018
PO BOX 19, CHARLOTTE, TX 78011-0019
PO BOX 20, CHARLOTTE, TX 78011-0020
PO BOX 21, CHARLOTTE, TX 78011-0021
PO BOX 22, CHARLOTTE, TX 78011-0022
PO BOX 23, CHARLOTTE, TX 78011-0023
PO BOX 24, CHARLOTTE, TX 78011-0024
PO BOX 25, CHARLOTTE, TX 78011-0025
PO BOX 26, CHARLOTTE, TX 78011-0026
PO BOX 27, CHARLOTTE, TX 78011-0027
PO BOX 28, CHARLOTTE, TX 78011-0028
PO BOX 29, CHARLOTTE, TX 78011-0029
PO BOX 30, CHARLOTTE, TX 78011-0030
PO BOX 31, CHARLOTTE, TX 78011-0031
PO BOX 32, CHARLOTTE, TX 78011-0032
PO BOX 33, CHARLOTTE, TX 78011-0033
PO BOX 34, CHARLOTTE, TX 78011-0034
PO BOX 35, CHARLOTTE, TX 78011-0035
PO BOX 36, CHARLOTTE, TX 78011-0036
PO BOX 37, CHARLOTTE, TX 78011-0037
PO BOX 38, CHARLOTTE, TX 78011-0038
PO BOX 39, CHARLOTTE, TX 78011-0039
PO BOX 40, CHARLOTTE, TX 78011-0040
PO BOX 41, CHARLOTTE, TX 78011-0041
PO BOX 42, CHARLOTTE, TX 78011-0042
PO BOX 43, CHARLOTTE, TX 78011-0043
PO BOX 44, CHARLOTTE, TX 78011-0044
PO BOX 45, CHARLOTTE, TX 78011-0045
PO BOX 46, CHARLOTTE, TX 78011-0046
PO BOX 47, CHARLOTTE, TX 78011-0047
PO BOX 48, CHARLOTTE, TX 78011-0048
PO BOX 49, CHARLOTTE, TX 78011-0049
PO BOX 50, CHARLOTTE, TX 78011-0050
PO BOX 51, CHARLOTTE, TX 78011-0051
PO BOX 52, CHARLOTTE, TX 78011-0052
PO BOX 53, CHARLOTTE, TX 78011-0053
PO BOX 54, CHARLOTTE, TX 78011-0054
PO BOX 55, CHARLOTTE, TX 78011-0055
PO BOX 56, CHARLOTTE, TX 78011-0056
PO BOX 57, CHARLOTTE, TX 78011-0057
PO BOX 58, CHARLOTTE, TX 78011-0058
PO BOX 59, CHARLOTTE, TX 78011-0059
PO BOX 60, CHARLOTTE, TX 78011-0060
PO BOX 61, CHARLOTTE, TX 78011-0061
PO BOX 62, CHARLOTTE, TX 78011-0062
PO BOX 63, CHARLOTTE, TX 78011-0063
PO BOX 64, CHARLOTTE, TX 78011-0064
PO BOX 65, CHARLOTTE, TX 78011-0065
PO BOX 66, CHARLOTTE, TX 78011-0066
PO BOX 67, CHARLOTTE, TX 78011-0067
PO BOX 68, CHARLOTTE, TX 78011-0068
PO BOX 69, CHARLOTTE, TX 78011-0069
PO BOX 70, CHARLOTTE, TX 78011-0070
PO BOX 71, CHARLOTTE, TX 78011-0071
PO BOX 72, CHARLOTTE, TX 78011-0072
PO BOX 73, CHARLOTTE, TX 78011-0073
PO BOX 74, CHARLOTTE, TX 78011-0074
PO BOX 75, CHARLOTTE, TX 78011-0075
PO BOX 76, CHARLOTTE, TX 78011-0076
PO BOX 77, CHARLOTTE, TX 78011-0077
PO BOX 78, CHARLOTTE, TX 78011-0078
PO BOX 79, CHARLOTTE, TX 78011-0079
PO BOX 80, CHARLOTTE, TX 78011-0080
PO BOX 81, CHARLOTTE, TX 78011-0081
PO BOX 82, CHARLOTTE, TX 78011-0082
PO BOX 83, CHARLOTTE, TX 78011-0083
PO BOX 84, CHARLOTTE, TX 78011-0084
PO BOX 85, CHARLOTTE, TX 78011-0085
PO BOX 86, CHARLOTTE, TX 78011-0086
PO BOX 87, CHARLOTTE, TX 78011-0087
PO BOX 88, CHARLOTTE, TX 78011-0088
PO BOX 89, CHARLOTTE, TX 78011-0089
PO BOX 90, CHARLOTTE, TX 78011-0090
PO BOX 91, CHARLOTTE, TX 78011-0091
PO BOX 92, CHARLOTTE, TX 78011-0092
PO BOX 93, CHARLOTTE, TX 78011-0093
PO BOX 94, CHARLOTTE, TX 78011-0094
PO BOX 95, CHARLOTTE, TX 78011-0095
PO BOX 96, CHARLOTTE, TX 78011-0096
PO BOX 97, CHARLOTTE, TX 78011-0097
PO BOX 98, CHARLOTTE, TX 78011-0098
PO BOX 99, CHARLOTTE, TX 78011-0099
PO BOX 100, CHARLOTTE, TX 78011-0100
PO BOX 101, CHARLOTTE, TX 78011-0101
PO BOX 102, CHARLOTTE, TX 78011-0102
PO BOX 103, CHARLOTTE, TX 78011-0103
PO BOX 104, CHARLOTTE, TX 78011-0104
PO BOX 105, CHARLOTTE, TX 78011-0105
PO BOX 106, CHARLOTTE, TX 78011-0106
PO BOX 107, CHARLOTTE, TX 78011-0107
PO BOX 108, CHARLOTTE, TX 78011-0108
PO BOX 109, CHARLOTTE, TX 78011-0109
PO BOX 110, CHARLOTTE, TX 78011-0110
PO BOX 111, CHARLOTTE, TX 78011-0111
PO BOX 112, CHARLOTTE, TX 78011-0112
PO BOX 113, CHARLOTTE, TX 78011-0113
PO BOX 114, CHARLOTTE, TX 78011-0114
PO BOX 115, CHARLOTTE, TX 78011-0115
PO BOX 116, CHARLOTTE, TX 78011-0116
PO BOX 117, CHARLOTTE, TX 78011-0117
PO BOX 118, CHARLOTTE, TX 78011-0118
PO BOX 119, CHARLOTTE, TX 78011-0119
PO BOX 120, CHARLOTTE, TX 78011-0120
PO BOX 121, CHARLOTTE, TX 78011-0121
PO BOX 122, CHARLOTTE, TX 78011-0122
PO BOX 123, CHARLOTTE, TX 78011-0123
PO BOX 124, CHARLOTTE, TX 78011-0124
PO BOX 125, CHARLOTTE, TX 78011-0125
PO BOX 126, CHARLOTTE, TX 78011-0126
PO BOX 127, CHARLOTTE, TX 78011-0127
PO BOX 128, CHARLOTTE, TX 78011-0128
PO BOX 129, CHARLOTTE, TX 78011-0129
PO BOX 130, CHARLOTTE, TX 78011-0130
PO BOX 131, CHARLOTTE, TX 78011-0131
PO BOX 132, CHARLOTTE, TX 78011-0132
PO BOX 133, CHARLOTTE, TX 78011-0133
PO BOX 134, CHARLOTTE, TX 78011-0134
PO BOX 135, CHARLOTTE, TX 78011-0135
PO BOX 136, CHARLOTTE, TX 78011-0136
PO BOX 137, CHARLOTTE, TX 78011-0137
PO BOX 138, CHARLOTTE, TX 78011-0138
PO BOX 139, CHARLOTTE, TX 78011-0139
PO BOX 140, CHARLOTTE, TX 78011-0140
PO BOX 141, CHARLOTTE, TX 78011-0141
PO BOX 142, CHARLOTTE, TX 78011-0142
PO BOX 143, CHARLOTTE, TX 78011-0143
PO BOX 144, CHARLOTTE, TX 78011-0144
PO BOX 145, CHARLOTTE, TX 78011-0145
PO BOX 146, CHARLOTTE, TX 78011-0146
PO BOX 147, CHARLOTTE, TX 78011-0147
PO BOX 148, CHARLOTTE, TX 78011-0148
PO BOX 149, CHARLOTTE, TX 78011-0149
PO BOX 150, CHARLOTTE, TX 78011-0150
PO BOX 151, CHARLOTTE, TX 78011-0151
PO BOX 152, CHARLOTTE, TX 78011-0152
PO BOX 153, CHARLOTTE, TX 78011-0153
PO BOX 154, CHARLOTTE, TX 78011-0154
PO BOX 155, CHARLOTTE, TX 78011-0155
PO BOX 156, CHARLOTTE, TX 78011-0156
PO BOX 157, CHARLOTTE, TX 78011-0157
PO BOX 158, CHARLOTTE, TX 78011-0158
PO BOX 159, CHARLOTTE, TX 78011-0159
PO BOX 160, CHARLOTTE, TX 78011-0160
PO BOX 161, CHARLOTTE, TX 78011-0161
PO BOX 162, CHARLOTTE, TX 78011-0162
PO BOX 163, CHARLOTTE, TX 78011-0163
PO BOX 164, CHARLOTTE, TX 78011-0164
PO BOX 165, CHARLOTTE, TX 78011-0165
PO BOX 166, CHARLOTTE, TX 78011-0166
PO BOX 167, CHARLOTTE, TX 78011-0167
PO BOX 168, CHARLOTTE, TX 78011-0168
PO BOX 169, CHARLOTTE, TX 78011-0169
PO BOX 170, CHARLOTTE, TX 78011-0170
PO BOX 171, CHARLOTTE, TX 78011-0171
PO BOX 172, CHARLOTTE, TX 78011-0172
PO BOX 173, CHARLOTTE, TX 78011-0173
PO BOX 174, CHARLOTTE, TX 78011-0174
PO BOX 175, CHARLOTTE, TX 78011-0175
PO BOX 176, CHARLOTTE, TX 78011-0176
PO BOX 177, CHARLOTTE, TX 78011-0177
PO BOX 178, CHARLOTTE, TX 78011-0178
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