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, CARTHAGE, MS 39051-0011
PO BOX 12, CARTHAGE, MS 39051-0012
PO BOX 13, CARTHAGE, MS 39051-0013
PO BOX 14, CARTHAGE, MS 39051-0014
PO BOX 15, CARTHAGE, MS 39051-0015
PO BOX 16, CARTHAGE, MS 39051-0016
PO BOX 17, CARTHAGE, MS 39051-0017
PO BOX 18, CARTHAGE, MS 39051-0018
PO BOX 19, CARTHAGE, MS 39051-0019
PO BOX 20, CARTHAGE, MS 39051-0020
PO BOX 21, CARTHAGE, MS 39051-0021
PO BOX 22, CARTHAGE, MS 39051-0022
PO BOX 23, CARTHAGE, MS 39051-0023
PO BOX 24, CARTHAGE, MS 39051-0024
PO BOX 25, CARTHAGE, MS 39051-0025
PO BOX 26, CARTHAGE, MS 39051-0026
PO BOX 27, CARTHAGE, MS 39051-0027
PO BOX 28, CARTHAGE, MS 39051-0028
PO BOX 29, CARTHAGE, MS 39051-0029
PO BOX 30, CARTHAGE, MS 39051-0030
PO BOX 31, CARTHAGE, MS 39051-0031
PO BOX 32, CARTHAGE, MS 39051-0032
PO BOX 33, CARTHAGE, MS 39051-0033
PO BOX 34, CARTHAGE, MS 39051-0034
PO BOX 35, CARTHAGE, MS 39051-0035
PO BOX 36, CARTHAGE, MS 39051-0036
PO BOX 37, CARTHAGE, MS 39051-0037
PO BOX 38, CARTHAGE, MS 39051-0038
PO BOX 39, CARTHAGE, MS 39051-0039
PO BOX 40, CARTHAGE, MS 39051-0040
PO BOX 41, CARTHAGE, MS 39051-0041
PO BOX 42, CARTHAGE, MS 39051-0042
PO BOX 43, CARTHAGE, MS 39051-0043
PO BOX 44, CARTHAGE, MS 39051-0044
PO BOX 45, CARTHAGE, MS 39051-0045
PO BOX 46, CARTHAGE, MS 39051-0046
PO BOX 47, CARTHAGE, MS 39051-0047
PO BOX 48, CARTHAGE, MS 39051-0048
PO BOX 49, CARTHAGE, MS 39051-0049
PO BOX 50, CARTHAGE, MS 39051-0050
PO BOX 51, CARTHAGE, MS 39051-0051
PO BOX 52, CARTHAGE, MS 39051-0052
PO BOX 53, CARTHAGE, MS 39051-0053
PO BOX 54, CARTHAGE, MS 39051-0054
PO BOX 55, CARTHAGE, MS 39051-0055
PO BOX 56, CARTHAGE, MS 39051-0056
PO BOX 57, CARTHAGE, MS 39051-0057
PO BOX 58, CARTHAGE, MS 39051-0058
PO BOX 59, CARTHAGE, MS 39051-0059
PO BOX 60, CARTHAGE, MS 39051-0060
PO BOX 61, CARTHAGE, MS 39051-0061
PO BOX 62, CARTHAGE, MS 39051-0062
PO BOX 63, CARTHAGE, MS 39051-0063
PO BOX 64, CARTHAGE, MS 39051-0064
PO BOX 65, CARTHAGE, MS 39051-0065
PO BOX 66, CARTHAGE, MS 39051-0066
PO BOX 67, CARTHAGE, MS 39051-0067
PO BOX 68, CARTHAGE, MS 39051-0068
PO BOX 69, CARTHAGE, MS 39051-0069
PO BOX 70, CARTHAGE, MS 39051-0070
PO BOX 71, CARTHAGE, MS 39051-0071
PO BOX 72, CARTHAGE, MS 39051-0072
PO BOX 73, CARTHAGE, MS 39051-0073
PO BOX 74, CARTHAGE, MS 39051-0074
PO BOX 75, CARTHAGE, MS 39051-0075
PO BOX 76, CARTHAGE, MS 39051-0076
PO BOX 77, CARTHAGE, MS 39051-0077
PO BOX 78, CARTHAGE, MS 39051-0078
PO BOX 79, CARTHAGE, MS 39051-0079
PO BOX 80, CARTHAGE, MS 39051-0080
PO BOX 81, CARTHAGE, MS 39051-0081
PO BOX 82, CARTHAGE, MS 39051-0082
PO BOX 83, CARTHAGE, MS 39051-0083
PO BOX 84, CARTHAGE, MS 39051-0084
PO BOX 85, CARTHAGE, MS 39051-0085
PO BOX 86, CARTHAGE, MS 39051-0086
PO BOX 87, CARTHAGE, MS 39051-0087
PO BOX 88, CARTHAGE, MS 39051-0088
PO BOX 89, CARTHAGE, MS 39051-0089
PO BOX 90, CARTHAGE, MS 39051-0090
PO BOX 91, CARTHAGE, MS 39051-0091
PO BOX 92, CARTHAGE, MS 39051-0092
PO BOX 93, CARTHAGE, MS 39051-0093
PO BOX 94, CARTHAGE, MS 39051-0094
PO BOX 95, CARTHAGE, MS 39051-0095
PO BOX 96, CARTHAGE, MS 39051-0096
PO BOX 97, CARTHAGE, MS 39051-0097
PO BOX 98, CARTHAGE, MS 39051-0098
PO BOX 99, CARTHAGE, MS 39051-0099
PO BOX 100, CARTHAGE, MS 39051-0100
PO BOX 101, CARTHAGE, MS 39051-0101
PO BOX 102, CARTHAGE, MS 39051-0102
PO BOX 103, CARTHAGE, MS 39051-0103
PO BOX 104, CARTHAGE, MS 39051-0104
PO BOX 105, CARTHAGE, MS 39051-0105
PO BOX 106, CARTHAGE, MS 39051-0106
PO BOX 107, CARTHAGE, MS 39051-0107
PO BOX 108, CARTHAGE, MS 39051-0108
PO BOX 109, CARTHAGE, MS 39051-0109
PO BOX 110, CARTHAGE, MS 39051-0110
PO BOX 111, CARTHAGE, MS 39051-0111
PO BOX 112, CARTHAGE, MS 39051-0112
PO BOX 113, CARTHAGE, MS 39051-0113
PO BOX 114, CARTHAGE, MS 39051-0114
PO BOX 115, CARTHAGE, MS 39051-0115
PO BOX 116, CARTHAGE, MS 39051-0116
PO BOX 117, CARTHAGE, MS 39051-0117
PO BOX 118, CARTHAGE, MS 39051-0118
PO BOX 119, CARTHAGE, MS 39051-0119
PO BOX 120, CARTHAGE, MS 39051-0120
PO BOX 121, CARTHAGE, MS 39051-0121
PO BOX 122, CARTHAGE, MS 39051-0122
PO BOX 123, CARTHAGE, MS 39051-0123
PO BOX 124, CARTHAGE, MS 39051-0124
PO BOX 125, CARTHAGE, MS 39051-0125
PO BOX 126, CARTHAGE, MS 39051-0126
PO BOX 127, CARTHAGE, MS 39051-0127
PO BOX 128, CARTHAGE, MS 39051-0128
PO BOX 129, CARTHAGE, MS 39051-0129
PO BOX 130, CARTHAGE, MS 39051-0130
PO BOX 131, CARTHAGE, MS 39051-0131
PO BOX 132, CARTHAGE, MS 39051-0132
PO BOX 133, CARTHAGE, MS 39051-0133
PO BOX 134, CARTHAGE, MS 39051-0134
PO BOX 135, CARTHAGE, MS 39051-0135
PO BOX 136, CARTHAGE, MS 39051-0136
PO BOX 137, CARTHAGE, MS 39051-0137
PO BOX 138, CARTHAGE, MS 39051-0138
PO BOX 139, CARTHAGE, MS 39051-0139
PO BOX 140, CARTHAGE, MS 39051-0140
PO BOX 141, CARTHAGE, MS 39051-0141
PO BOX 142, CARTHAGE, MS 39051-0142
PO BOX 143, CARTHAGE, MS 39051-0143
PO BOX 144, CARTHAGE, MS 39051-0144
PO BOX 145, CARTHAGE, MS 39051-0145
PO BOX 146, CARTHAGE, MS 39051-0146
PO BOX 147, CARTHAGE, MS 39051-0147
PO BOX 148, CARTHAGE, MS 39051-0148
PO BOX 149, CARTHAGE, MS 39051-0149
PO BOX 150, CARTHAGE, MS 39051-0150
PO BOX 151, CARTHAGE, MS 39051-0151
PO BOX 152, CARTHAGE, MS 39051-0152
PO BOX 153, CARTHAGE, MS 39051-0153
PO BOX 154, CARTHAGE, MS 39051-0154
PO BOX 155, CARTHAGE, MS 39051-0155
PO BOX 156, CARTHAGE, MS 39051-0156
PO BOX 157, CARTHAGE, MS 39051-0157
PO BOX 158, CARTHAGE, MS 39051-0158
PO BOX 159, CARTHAGE, MS 39051-0159
PO BOX 160, CARTHAGE, MS 39051-0160
PO BOX 161, CARTHAGE, MS 39051-0161
PO BOX 162, CARTHAGE, MS 39051-0162
PO BOX 163, CARTHAGE, MS 39051-0163
PO BOX 164, CARTHAGE, MS 39051-0164
PO BOX 165, CARTHAGE, MS 39051-0165
PO BOX 166, CARTHAGE, MS 39051-0166
PO BOX 167, CARTHAGE, MS 39051-0167
PO BOX 168, CARTHAGE, MS 39051-0168
PO BOX 169, CARTHAGE, MS 39051-0169
PO BOX 170, CARTHAGE, MS 39051-0170
PO BOX 171, CARTHAGE, MS 39051-0171
PO BOX 172, CARTHAGE, MS 39051-0172
PO BOX 173, CARTHAGE, MS 39051-0173
PO BOX 174, CARTHAGE, MS 39051-0174
PO BOX 175, CARTHAGE, MS 39051-0175
PO BOX 176, CARTHAGE, MS 39051-0176
PO BOX 177, CARTHAGE, MS 39051-0177
PO BOX 178, CARTHAGE, MS 39051-0178
PO BOX 179, CARTHAGE, MS 39051-0179
PO BOX 180, CARTHAGE, MS 39051-0180
PO BOX 181, CARTHAGE, MS 39051-0181
PO BOX 182, CARTHAGE, MS 39051-0182
PO BOX 183, CARTHAGE, MS 39051-0183
PO BOX 184, CARTHAGE, MS 39051-0184
PO BOX 185, CARTHAGE, MS 39051-0185
PO BOX 186, CARTHAGE, MS 39051-0186
PO BOX 187, CARTHAGE, MS 39051-0187
PO BOX 188, CARTHAGE, MS 39051-0188
PO BOX 189, CARTHAGE, MS 39051-0189
PO BOX 190, CARTHAGE, MS 39051-0190
PO BOX 191, CARTHAGE, MS 39051-0191
PO BOX 192, CARTHAGE, MS 39051-0192