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 40021, PROVIDENCE, RI 02940-0021
PO BOX 40022, PROVIDENCE, RI 02940-0022
PO BOX 40023, PROVIDENCE, RI 02940-0023
PO BOX 40024, PROVIDENCE, RI 02940-0024
PO BOX 40025, PROVIDENCE, RI 02940-0025
PO BOX 40026, PROVIDENCE, RI 02940-0026
PO BOX 40027, PROVIDENCE, RI 02940-0027
PO BOX 40028, PROVIDENCE, RI 02940-0028
PO BOX 40029, PROVIDENCE, RI 02940-0029
PO BOX 40030, PROVIDENCE, RI 02940-0030
PO BOX 40031, PROVIDENCE, RI 02940-0031
PO BOX 40032, PROVIDENCE, RI 02940-0032
PO BOX 40033, PROVIDENCE, RI 02940-0033
PO BOX 40034, PROVIDENCE, RI 02940-0034
PO BOX 40035, PROVIDENCE, RI 02940-0035
PO BOX 40036, PROVIDENCE, RI 02940-0036
PO BOX 40037, PROVIDENCE, RI 02940-0037
PO BOX 40038, PROVIDENCE, RI 02940-0038
PO BOX 40039, PROVIDENCE, RI 02940-0039
PO BOX 40040, PROVIDENCE, RI 02940-0040
PO BOX 40041, PROVIDENCE, RI 02940-0041
PO BOX 40042, PROVIDENCE, RI 02940-0042
PO BOX 40043, PROVIDENCE, RI 02940-0043
PO BOX 40044, PROVIDENCE, RI 02940-0044
PO BOX 40045, PROVIDENCE, RI 02940-0045
PO BOX 40046, PROVIDENCE, RI 02940-0046
PO BOX 40047, PROVIDENCE, RI 02940-0047
PO BOX 40048, PROVIDENCE, RI 02940-0048
PO BOX 40049, PROVIDENCE, RI 02940-0049
PO BOX 40050, PROVIDENCE, RI 02940-0050
PO BOX 40051, PROVIDENCE, RI 02940-0051
PO BOX 40052, PROVIDENCE, RI 02940-0052
PO BOX 40053, PROVIDENCE, RI 02940-0053
PO BOX 40054, PROVIDENCE, RI 02940-0054
PO BOX 40055, PROVIDENCE, RI 02940-0055
PO BOX 40056, PROVIDENCE, RI 02940-0056
PO BOX 40057, PROVIDENCE, RI 02940-0057
PO BOX 40058, PROVIDENCE, RI 02940-0058
PO BOX 40059, PROVIDENCE, RI 02940-0059
PO BOX 40060, PROVIDENCE, RI 02940-0060
PO BOX 40061, PROVIDENCE, RI 02940-0061
PO BOX 40062, PROVIDENCE, RI 02940-0062
PO BOX 40063, PROVIDENCE, RI 02940-0063
PO BOX 40064, PROVIDENCE, RI 02940-0064
PO BOX 40065, PROVIDENCE, RI 02940-0065
PO BOX 40066, PROVIDENCE, RI 02940-0066
PO BOX 40067, PROVIDENCE, RI 02940-0067
PO BOX 40068, PROVIDENCE, RI 02940-0068
PO BOX 40069, PROVIDENCE, RI 02940-0069
PO BOX 40070, PROVIDENCE, RI 02940-0070
PO BOX 40071, PROVIDENCE, RI 02940-0071
PO BOX 40072, PROVIDENCE, RI 02940-0072
PO BOX 40073, PROVIDENCE, RI 02940-0073
PO BOX 40074, PROVIDENCE, RI 02940-0074
PO BOX 40075, PROVIDENCE, RI 02940-0075
PO BOX 40076, PROVIDENCE, RI 02940-0076
PO BOX 40077, PROVIDENCE, RI 02940-0077
PO BOX 40078, PROVIDENCE, RI 02940-0078
PO BOX 40079, PROVIDENCE, RI 02940-0079
PO BOX 40080, PROVIDENCE, RI 02940-0080
PO BOX 40081, PROVIDENCE, RI 02940-0081
PO BOX 40082, PROVIDENCE, RI 02940-0082
PO BOX 40083, PROVIDENCE, RI 02940-0083
PO BOX 40084, PROVIDENCE, RI 02940-0084
PO BOX 40085, PROVIDENCE, RI 02940-0085
PO BOX 40086, PROVIDENCE, RI 02940-0086
PO BOX 40087, PROVIDENCE, RI 02940-0087
PO BOX 40088, PROVIDENCE, RI 02940-0088
PO BOX 40089, PROVIDENCE, RI 02940-0089
PO BOX 40090, PROVIDENCE, RI 02940-0090
PO BOX 40091, PROVIDENCE, RI 02940-0091
PO BOX 40092, PROVIDENCE, RI 02940-0092
PO BOX 40093, PROVIDENCE, RI 02940-0093
PO BOX 40094, PROVIDENCE, RI 02940-0094
PO BOX 40095, PROVIDENCE, RI 02940-0095
PO BOX 40096, PROVIDENCE, RI 02940-0096
PO BOX 40097, PROVIDENCE, RI 02940-0097
PO BOX 40098, PROVIDENCE, RI 02940-0098
PO BOX 40099, PROVIDENCE, RI 02940-0099
PO BOX 40100, PROVIDENCE, RI 02940-0100
PO BOX 40101, PROVIDENCE, RI 02940-0101
PO BOX 40102, PROVIDENCE, RI 02940-0102
PO BOX 40103, PROVIDENCE, RI 02940-0103
PO BOX 40104, PROVIDENCE, RI 02940-0104
PO BOX 40105, PROVIDENCE, RI 02940-0105
PO BOX 40106, PROVIDENCE, RI 02940-0106
PO BOX 40107, PROVIDENCE, RI 02940-0107
PO BOX 40108, PROVIDENCE, RI 02940-0108
PO BOX 40109, PROVIDENCE, RI 02940-0109
PO BOX 40110, PROVIDENCE, RI 02940-0110
PO BOX 40111, PROVIDENCE, RI 02940-0111
PO BOX 40112, PROVIDENCE, RI 02940-0112
PO BOX 40113, PROVIDENCE, RI 02940-0113
PO BOX 40114, PROVIDENCE, RI 02940-0114
PO BOX 40115, PROVIDENCE, RI 02940-0115
PO BOX 40116, PROVIDENCE, RI 02940-0116
PO BOX 40117, PROVIDENCE, RI 02940-0117
PO BOX 40118, PROVIDENCE, RI 02940-0118
PO BOX 40119, PROVIDENCE, RI 02940-0119
PO BOX 40120, PROVIDENCE, RI 02940-0120
PO BOX 40121, PROVIDENCE, RI 02940-0121
PO BOX 40122, PROVIDENCE, RI 02940-0122
PO BOX 40123, PROVIDENCE, RI 02940-0123
PO BOX 40124, PROVIDENCE, RI 02940-0124
PO BOX 40125, PROVIDENCE, RI 02940-0125
PO BOX 40126, PROVIDENCE, RI 02940-0126
PO BOX 40127, PROVIDENCE, RI 02940-0127
PO BOX 40128, PROVIDENCE, RI 02940-0128
PO BOX 40129, PROVIDENCE, RI 02940-0129
PO BOX 40130, PROVIDENCE, RI 02940-0130
PO BOX 40131, PROVIDENCE, RI 02940-0131
PO BOX 40132, PROVIDENCE, RI 02940-0132
PO BOX 40133, PROVIDENCE, RI 02940-0133
PO BOX 40134, PROVIDENCE, RI 02940-0134
PO BOX 40135, PROVIDENCE, RI 02940-0135
PO BOX 40136, PROVIDENCE, RI 02940-0136
PO BOX 40137, PROVIDENCE, RI 02940-0137
PO BOX 40138, PROVIDENCE, RI 02940-0138
PO BOX 40139, PROVIDENCE, RI 02940-0139
PO BOX 40140, PROVIDENCE, RI 02940-0140
PO BOX 40141, PROVIDENCE, RI 02940-0141
PO BOX 40142, PROVIDENCE, RI 02940-0142
PO BOX 40143, PROVIDENCE, RI 02940-0143
PO BOX 40144, PROVIDENCE, RI 02940-0144
PO BOX 40145, PROVIDENCE, RI 02940-0145
PO BOX 40146, PROVIDENCE, RI 02940-0146
PO BOX 40147, PROVIDENCE, RI 02940-0147
PO BOX 40148, PROVIDENCE, RI 02940-0148
PO BOX 40149, PROVIDENCE, RI 02940-0149
PO BOX 40150, PROVIDENCE, RI 02940-0150
PO BOX 40151, PROVIDENCE, RI 02940-0151
PO BOX 40152, PROVIDENCE, RI 02940-0152
PO BOX 40153, PROVIDENCE, RI 02940-0153
PO BOX 40154, PROVIDENCE, RI 02940-0154
PO BOX 40155, PROVIDENCE, RI 02940-0155
PO BOX 40156, PROVIDENCE, RI 02940-0156
PO BOX 40157, PROVIDENCE, RI 02940-0157
PO BOX 40158, PROVIDENCE, RI 02940-0158
PO BOX 40159, PROVIDENCE, RI 02940-0159
PO BOX 40160, PROVIDENCE, RI 02940-0160
PO BOX 40161, PROVIDENCE, RI 02940-0161
PO BOX 40162, PROVIDENCE, RI 02940-0162
PO BOX 40163, PROVIDENCE, RI 02940-0163
PO BOX 40164, PROVIDENCE, RI 02940-0164
PO BOX 40165, PROVIDENCE, RI 02940-0165
PO BOX 40166, PROVIDENCE, RI 02940-0166
PO BOX 40167, PROVIDENCE, RI 02940-0167
PO BOX 40168, PROVIDENCE, RI 02940-0168
PO BOX 40169, PROVIDENCE, RI 02940-0169
PO BOX 40170, PROVIDENCE, RI 02940-0170
PO BOX 40171, PROVIDENCE, RI 02940-0171
PO BOX 40172, PROVIDENCE, RI 02940-0172
PO BOX 40173, PROVIDENCE, RI 02940-0173
PO BOX 40174, PROVIDENCE, RI 02940-0174
PO BOX 40175, PROVIDENCE, RI 02940-0175
PO BOX 40176, PROVIDENCE, RI 02940-0176
PO BOX 40177, PROVIDENCE, RI 02940-0177
PO BOX 40178, PROVIDENCE, RI 02940-0178
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