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, MOUNT OLIVE, NC 28365-0011
PO BOX 12, MOUNT OLIVE, NC 28365-0012
PO BOX 13, MOUNT OLIVE, NC 28365-0013
PO BOX 14, MOUNT OLIVE, NC 28365-0014
PO BOX 15, MOUNT OLIVE, NC 28365-0015
PO BOX 16, MOUNT OLIVE, NC 28365-0016
PO BOX 17, MOUNT OLIVE, NC 28365-0017
PO BOX 18, MOUNT OLIVE, NC 28365-0018
PO BOX 19, MOUNT OLIVE, NC 28365-0019
PO BOX 20, MOUNT OLIVE, NC 28365-0020
PO BOX 21, MOUNT OLIVE, NC 28365-0021
PO BOX 22, MOUNT OLIVE, NC 28365-0022
PO BOX 23, MOUNT OLIVE, NC 28365-0023
PO BOX 24, MOUNT OLIVE, NC 28365-0024
PO BOX 25, MOUNT OLIVE, NC 28365-0025
PO BOX 26, MOUNT OLIVE, NC 28365-0026
PO BOX 27, MOUNT OLIVE, NC 28365-0027
PO BOX 28, MOUNT OLIVE, NC 28365-0028
PO BOX 29, MOUNT OLIVE, NC 28365-0029
PO BOX 30, MOUNT OLIVE, NC 28365-0030
PO BOX 31, MOUNT OLIVE, NC 28365-0031
PO BOX 32, MOUNT OLIVE, NC 28365-0032
PO BOX 33, MOUNT OLIVE, NC 28365-0033
PO BOX 34, MOUNT OLIVE, NC 28365-0034
PO BOX 35, MOUNT OLIVE, NC 28365-0035
PO BOX 36, MOUNT OLIVE, NC 28365-0036
PO BOX 37, MOUNT OLIVE, NC 28365-0037
PO BOX 38, MOUNT OLIVE, NC 28365-0038
PO BOX 39, MOUNT OLIVE, NC 28365-0039
PO BOX 40, MOUNT OLIVE, NC 28365-0040
PO BOX 41, MOUNT OLIVE, NC 28365-0041
PO BOX 42, MOUNT OLIVE, NC 28365-0042
PO BOX 43, MOUNT OLIVE, NC 28365-0043
PO BOX 44, MOUNT OLIVE, NC 28365-0044
PO BOX 45, MOUNT OLIVE, NC 28365-0045
PO BOX 46, MOUNT OLIVE, NC 28365-0046
PO BOX 47, MOUNT OLIVE, NC 28365-0047
PO BOX 48, MOUNT OLIVE, NC 28365-0048
PO BOX 49, MOUNT OLIVE, NC 28365-0049
PO BOX 50, MOUNT OLIVE, NC 28365-0050
PO BOX 51, MOUNT OLIVE, NC 28365-0051
PO BOX 52, MOUNT OLIVE, NC 28365-0052
PO BOX 53, MOUNT OLIVE, NC 28365-0053
PO BOX 54, MOUNT OLIVE, NC 28365-0054
PO BOX 55, MOUNT OLIVE, NC 28365-0055
PO BOX 56, MOUNT OLIVE, NC 28365-0056
PO BOX 57, MOUNT OLIVE, NC 28365-0057
PO BOX 58, MOUNT OLIVE, NC 28365-0058
PO BOX 59, MOUNT OLIVE, NC 28365-0059
PO BOX 60, MOUNT OLIVE, NC 28365-0060
PO BOX 61, MOUNT OLIVE, NC 28365-0061
PO BOX 62, MOUNT OLIVE, NC 28365-0062
PO BOX 63, MOUNT OLIVE, NC 28365-0063
PO BOX 64, MOUNT OLIVE, NC 28365-0064
PO BOX 65, MOUNT OLIVE, NC 28365-0065
PO BOX 66, MOUNT OLIVE, NC 28365-0066
PO BOX 67, MOUNT OLIVE, NC 28365-0067
PO BOX 68, MOUNT OLIVE, NC 28365-0068
PO BOX 69, MOUNT OLIVE, NC 28365-0069
PO BOX 70, MOUNT OLIVE, NC 28365-0070
PO BOX 71, MOUNT OLIVE, NC 28365-0071
PO BOX 72, MOUNT OLIVE, NC 28365-0072
PO BOX 73, MOUNT OLIVE, NC 28365-0073
PO BOX 74, MOUNT OLIVE, NC 28365-0074
PO BOX 75, MOUNT OLIVE, NC 28365-0075
PO BOX 76, MOUNT OLIVE, NC 28365-0076
PO BOX 77, MOUNT OLIVE, NC 28365-0077
PO BOX 78, MOUNT OLIVE, NC 28365-0078
PO BOX 79, MOUNT OLIVE, NC 28365-0079
PO BOX 80, MOUNT OLIVE, NC 28365-0080
PO BOX 81, MOUNT OLIVE, NC 28365-0081
PO BOX 82, MOUNT OLIVE, NC 28365-0082
PO BOX 83, MOUNT OLIVE, NC 28365-0083
PO BOX 84, MOUNT OLIVE, NC 28365-0084
PO BOX 85, MOUNT OLIVE, NC 28365-0085
PO BOX 86, MOUNT OLIVE, NC 28365-0086
PO BOX 87, MOUNT OLIVE, NC 28365-0087
PO BOX 88, MOUNT OLIVE, NC 28365-0088
PO BOX 89, MOUNT OLIVE, NC 28365-0089
PO BOX 90, MOUNT OLIVE, NC 28365-0090
PO BOX 91, MOUNT OLIVE, NC 28365-0091
PO BOX 92, MOUNT OLIVE, NC 28365-0092
PO BOX 93, MOUNT OLIVE, NC 28365-0093
PO BOX 94, MOUNT OLIVE, NC 28365-0094
PO BOX 95, MOUNT OLIVE, NC 28365-0095
PO BOX 96, MOUNT OLIVE, NC 28365-0096
PO BOX 97, MOUNT OLIVE, NC 28365-0097
PO BOX 98, MOUNT OLIVE, NC 28365-0098
PO BOX 99, MOUNT OLIVE, NC 28365-0099
PO BOX 100, MOUNT OLIVE, NC 28365-0100
PO BOX 101, MOUNT OLIVE, NC 28365-0101
PO BOX 102, MOUNT OLIVE, NC 28365-0102
PO BOX 103, MOUNT OLIVE, NC 28365-0103
PO BOX 104, MOUNT OLIVE, NC 28365-0104
PO BOX 105, MOUNT OLIVE, NC 28365-0105
PO BOX 106, MOUNT OLIVE, NC 28365-0106
PO BOX 107, MOUNT OLIVE, NC 28365-0107
PO BOX 108, MOUNT OLIVE, NC 28365-0108
PO BOX 109, MOUNT OLIVE, NC 28365-0109
PO BOX 110, MOUNT OLIVE, NC 28365-0110
PO BOX 111, MOUNT OLIVE, NC 28365-0111
PO BOX 112, MOUNT OLIVE, NC 28365-0112
PO BOX 113, MOUNT OLIVE, NC 28365-0113
PO BOX 114, MOUNT OLIVE, NC 28365-0114
PO BOX 115, MOUNT OLIVE, NC 28365-0115
PO BOX 116, MOUNT OLIVE, NC 28365-0116
PO BOX 117, MOUNT OLIVE, NC 28365-0117
PO BOX 118, MOUNT OLIVE, NC 28365-0118
PO BOX 119, MOUNT OLIVE, NC 28365-0119
PO BOX 120, MOUNT OLIVE, NC 28365-0120
PO BOX 121, MOUNT OLIVE, NC 28365-0121
PO BOX 122, MOUNT OLIVE, NC 28365-0122
PO BOX 123, MOUNT OLIVE, NC 28365-0123
PO BOX 124, MOUNT OLIVE, NC 28365-0124
PO BOX 125, MOUNT OLIVE, NC 28365-0125
PO BOX 126, MOUNT OLIVE, NC 28365-0126
PO BOX 127, MOUNT OLIVE, NC 28365-0127
PO BOX 128, MOUNT OLIVE, NC 28365-0128
PO BOX 129, MOUNT OLIVE, NC 28365-0129
PO BOX 130, MOUNT OLIVE, NC 28365-0130
PO BOX 131, MOUNT OLIVE, NC 28365-0131
PO BOX 132, MOUNT OLIVE, NC 28365-0132
PO BOX 133, MOUNT OLIVE, NC 28365-0133
PO BOX 134, MOUNT OLIVE, NC 28365-0134
PO BOX 135, MOUNT OLIVE, NC 28365-0135
PO BOX 136, MOUNT OLIVE, NC 28365-0136
PO BOX 137, MOUNT OLIVE, NC 28365-0137
PO BOX 138, MOUNT OLIVE, NC 28365-0138
PO BOX 139, MOUNT OLIVE, NC 28365-0139
PO BOX 140, MOUNT OLIVE, NC 28365-0140
PO BOX 141, MOUNT OLIVE, NC 28365-0141
PO BOX 142, MOUNT OLIVE, NC 28365-0142
PO BOX 143, MOUNT OLIVE, NC 28365-0143
PO BOX 144, MOUNT OLIVE, NC 28365-0144
PO BOX 145, MOUNT OLIVE, NC 28365-0145
PO BOX 146, MOUNT OLIVE, NC 28365-0146
PO BOX 147, MOUNT OLIVE, NC 28365-0147
PO BOX 148, MOUNT OLIVE, NC 28365-0148
PO BOX 149, MOUNT OLIVE, NC 28365-0149
PO BOX 150, MOUNT OLIVE, NC 28365-0150
PO BOX 151, MOUNT OLIVE, NC 28365-0151
PO BOX 152, MOUNT OLIVE, NC 28365-0152
PO BOX 153, MOUNT OLIVE, NC 28365-0153
PO BOX 154, MOUNT OLIVE, NC 28365-0154
PO BOX 155, MOUNT OLIVE, NC 28365-0155
PO BOX 156, MOUNT OLIVE, NC 28365-0156
PO BOX 157, MOUNT OLIVE, NC 28365-0157
PO BOX 158, MOUNT OLIVE, NC 28365-0158
PO BOX 159, MOUNT OLIVE, NC 28365-0159
PO BOX 160, MOUNT OLIVE, NC 28365-0160
PO BOX 161, MOUNT OLIVE, NC 28365-0161
PO BOX 162, MOUNT OLIVE, NC 28365-0162
PO BOX 163, MOUNT OLIVE, NC 28365-0163
PO BOX 164, MOUNT OLIVE, NC 28365-0164
PO BOX 165, MOUNT OLIVE, NC 28365-0165
PO BOX 166, MOUNT OLIVE, NC 28365-0166
PO BOX 167, MOUNT OLIVE, NC 28365-0167
PO BOX 168, MOUNT OLIVE, NC 28365-0168
PO BOX 169, MOUNT OLIVE, NC 28365-0169
PO BOX 170, MOUNT OLIVE, NC 28365-0170
PO BOX 171, MOUNT OLIVE, NC 28365-0171
PO BOX 172, MOUNT OLIVE, NC 28365-0172
PO BOX 173, MOUNT OLIVE, NC 28365-0173
PO BOX 174, MOUNT OLIVE, NC 28365-0174
PO BOX 175, MOUNT OLIVE, NC 28365-0175
PO BOX 176, MOUNT OLIVE, NC 28365-0176
PO BOX 177, MOUNT OLIVE, NC 28365-0177
PO BOX 178, MOUNT OLIVE, NC 28365-0178
PO BOX 179, MOUNT OLIVE, NC 28365-0179
PO BOX 180, MOUNT OLIVE, NC 28365-0180
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