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 60064, CITY OF INDUSTRY, CA 91716-0064
PO BOX 60065, CITY OF INDUSTRY, CA 91716-0065
PO BOX 60066, CITY OF INDUSTRY, CA 91716-0066
PO BOX 60067, CITY OF INDUSTRY, CA 91716-0067
PO BOX 60068, CITY OF INDUSTRY, CA 91716-0068
PO BOX 60069, CITY OF INDUSTRY, CA 91716-0069
PO BOX 60070, CITY OF INDUSTRY, CA 91716-0070
PO BOX 60071, CITY OF INDUSTRY, CA 91716-0071
PO BOX 60072, CITY OF INDUSTRY, CA 91716-0072
PO BOX 60073, CITY OF INDUSTRY, CA 91716-0073
PO BOX 60074, CITY OF INDUSTRY, CA 91716-0074
PO BOX 60075, CITY OF INDUSTRY, CA 91716-0075
PO BOX 60076, CITY OF INDUSTRY, CA 91716-0076
PO BOX 60077, CITY OF INDUSTRY, CA 91716-0077
PO BOX 60078, CITY OF INDUSTRY, CA 91716-0078
PO BOX 60079, CITY OF INDUSTRY, CA 91716-0079
PO BOX 60080, CITY OF INDUSTRY, CA 91716-0080
PO BOX 60081, CITY OF INDUSTRY, CA 91716-0081
PO BOX 60082, CITY OF INDUSTRY, CA 91716-0082
PO BOX 60083, CITY OF INDUSTRY, CA 91716-0083
PO BOX 60084, CITY OF INDUSTRY, CA 91716-0084
PO BOX 60085, CITY OF INDUSTRY, CA 91716-0085
PO BOX 60086, CITY OF INDUSTRY, CA 91716-0086
PO BOX 60087, CITY OF INDUSTRY, CA 91716-0087
PO BOX 60088, CITY OF INDUSTRY, CA 91716-0088
PO BOX 60089, CITY OF INDUSTRY, CA 91716-0089
PO BOX 60090, CITY OF INDUSTRY, CA 91716-0090
PO BOX 60091, CITY OF INDUSTRY, CA 91716-0091
PO BOX 60092, CITY OF INDUSTRY, CA 91716-0092
PO BOX 60093, CITY OF INDUSTRY, CA 91716-0093
PO BOX 60094, CITY OF INDUSTRY, CA 91716-0094
PO BOX 60095, CITY OF INDUSTRY, CA 91716-0095
PO BOX 60096, CITY OF INDUSTRY, CA 91716-0096
PO BOX 60097, CITY OF INDUSTRY, CA 91716-0097
PO BOX 60098, CITY OF INDUSTRY, CA 91716-0098
PO BOX 60099, CITY OF INDUSTRY, CA 91716-0099
PO BOX 60100, CITY OF INDUSTRY, CA 91716-0100
PO BOX 60101, CITY OF INDUSTRY, CA 91716-0101
PO BOX 60102, CITY OF INDUSTRY, CA 91716-0102
PO BOX 60103, CITY OF INDUSTRY, CA 91716-0103
PO BOX 60104, CITY OF INDUSTRY, CA 91716-0104
PO BOX 60105, CITY OF INDUSTRY, CA 91716-0105
PO BOX 60106, CITY OF INDUSTRY, CA 91716-0106
PO BOX 60107, CITY OF INDUSTRY, CA 91716-0107
PO BOX 60108, CITY OF INDUSTRY, CA 91716-0108
PO BOX 60109, CITY OF INDUSTRY, CA 91716-0109
PO BOX 60110, CITY OF INDUSTRY, CA 91716-0110
PO BOX 60111, CITY OF INDUSTRY, CA 91716-0111
PO BOX 60112, CITY OF INDUSTRY, CA 91716-0112
PO BOX 60113, CITY OF INDUSTRY, CA 91716-0113
PO BOX 60114, CITY OF INDUSTRY, CA 91716-0114
PO BOX 60115, CITY OF INDUSTRY, CA 91716-0115
PO BOX 60116, CITY OF INDUSTRY, CA 91716-0116
PO BOX 60117, CITY OF INDUSTRY, CA 91716-0117
PO BOX 60118, CITY OF INDUSTRY, CA 91716-0118
PO BOX 60119, CITY OF INDUSTRY, CA 91716-0119
PO BOX 60120, CITY OF INDUSTRY, CA 91716-0120
PO BOX 60121, CITY OF INDUSTRY, CA 91716-0121
PO BOX 60122, CITY OF INDUSTRY, CA 91716-0122
PO BOX 60123, CITY OF INDUSTRY, CA 91716-0123
PO BOX 60124, CITY OF INDUSTRY, CA 91716-0124
PO BOX 60125, CITY OF INDUSTRY, CA 91716-0125
PO BOX 60126, CITY OF INDUSTRY, CA 91716-0126
PO BOX 60127, CITY OF INDUSTRY, CA 91716-0127
PO BOX 60128, CITY OF INDUSTRY, CA 91716-0128
PO BOX 60129, CITY OF INDUSTRY, CA 91716-0129
PO BOX 60130, CITY OF INDUSTRY, CA 91716-0130
PO BOX 60131, CITY OF INDUSTRY, CA 91716-0131
PO BOX 60132, CITY OF INDUSTRY, CA 91716-0132
PO BOX 60133, CITY OF INDUSTRY, CA 91716-0133
PO BOX 60134, CITY OF INDUSTRY, CA 91716-0134
PO BOX 60135, CITY OF INDUSTRY, CA 91716-0135
PO BOX 60136, CITY OF INDUSTRY, CA 91716-0136
PO BOX 60137, CITY OF INDUSTRY, CA 91716-0137
PO BOX 60138, CITY OF INDUSTRY, CA 91716-0138
PO BOX 60139, CITY OF INDUSTRY, CA 91716-0139
PO BOX 60140, CITY OF INDUSTRY, CA 91716-0140
PO BOX 60141, CITY OF INDUSTRY, CA 91716-0141
PO BOX 60142, CITY OF INDUSTRY, CA 91716-0142
PO BOX 60143, CITY OF INDUSTRY, CA 91716-0143
PO BOX 60144, CITY OF INDUSTRY, CA 91716-0144
PO BOX 60145, CITY OF INDUSTRY, CA 91716-0145
PO BOX 60146, CITY OF INDUSTRY, CA 91716-0146
PO BOX 60147, CITY OF INDUSTRY, CA 91716-0147
PO BOX 60148, CITY OF INDUSTRY, CA 91716-0148
PO BOX 60149, CITY OF INDUSTRY, CA 91716-0149
PO BOX 60150, CITY OF INDUSTRY, CA 91716-0150
PO BOX 60151, CITY OF INDUSTRY, CA 91716-0151
PO BOX 60152, CITY OF INDUSTRY, CA 91716-0152
PO BOX 60153, CITY OF INDUSTRY, CA 91716-0153
PO BOX 60154, CITY OF INDUSTRY, CA 91716-0154
PO BOX 60155, CITY OF INDUSTRY, CA 91716-0155
PO BOX 60156, CITY OF INDUSTRY, CA 91716-0156
PO BOX 60157, CITY OF INDUSTRY, CA 91716-0157
PO BOX 60158, CITY OF INDUSTRY, CA 91716-0158
PO BOX 60159, CITY OF INDUSTRY, CA 91716-0159
PO BOX 60160, CITY OF INDUSTRY, CA 91716-0160
PO BOX 60161, CITY OF INDUSTRY, CA 91716-0161
PO BOX 60162, CITY OF INDUSTRY, CA 91716-0162
PO BOX 60163, CITY OF INDUSTRY, CA 91716-0163
PO BOX 60164, CITY OF INDUSTRY, CA 91716-0164
PO BOX 60165, CITY OF INDUSTRY, CA 91716-0165
PO BOX 60166, CITY OF INDUSTRY, CA 91716-0166
PO BOX 60167, CITY OF INDUSTRY, CA 91716-0167
PO BOX 60168, CITY OF INDUSTRY, CA 91716-0168
PO BOX 60169, CITY OF INDUSTRY, CA 91716-0169
PO BOX 60170, CITY OF INDUSTRY, CA 91716-0170
PO BOX 60171, CITY OF INDUSTRY, CA 91716-0171
PO BOX 60172, CITY OF INDUSTRY, CA 91716-0172
PO BOX 60173, CITY OF INDUSTRY, CA 91716-0173
PO BOX 60174, CITY OF INDUSTRY, CA 91716-0174
PO BOX 60175, CITY OF INDUSTRY, CA 91716-0175
PO BOX 60176, CITY OF INDUSTRY, CA 91716-0176
PO BOX 60177, CITY OF INDUSTRY, CA 91716-0177
PO BOX 60178, CITY OF INDUSTRY, CA 91716-0178
PO BOX 60179, CITY OF INDUSTRY, CA 91716-0179
PO BOX 60180, CITY OF INDUSTRY, CA 91716-0180
PO BOX 60181, CITY OF INDUSTRY, CA 91716-0181
PO BOX 60182, CITY OF INDUSTRY, CA 91716-0182
PO BOX 60183, CITY OF INDUSTRY, CA 91716-0183
PO BOX 60184, CITY OF INDUSTRY, CA 91716-0184
PO BOX 60185, CITY OF INDUSTRY, CA 91716-0185
PO BOX 60186, CITY OF INDUSTRY, CA 91716-0186
PO BOX 60187, CITY OF INDUSTRY, CA 91716-0187
PO BOX 60188, CITY OF INDUSTRY, CA 91716-0188
PO BOX 60189, CITY OF INDUSTRY, CA 91716-0189
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