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 10, BERKELEY HEIGHTS, NJ 07922-0010
PO BOX 11, BERKELEY HEIGHTS, NJ 07922-0011
PO BOX 12, BERKELEY HEIGHTS, NJ 07922-0012
PO BOX 13, BERKELEY HEIGHTS, NJ 07922-0013
PO BOX 14, BERKELEY HEIGHTS, NJ 07922-0014
PO BOX 15, BERKELEY HEIGHTS, NJ 07922-0015
PO BOX 16, BERKELEY HEIGHTS, NJ 07922-0016
PO BOX 17, BERKELEY HEIGHTS, NJ 07922-0017
PO BOX 18, BERKELEY HEIGHTS, NJ 07922-0018
PO BOX 19, BERKELEY HEIGHTS, NJ 07922-0019
PO BOX 20, BERKELEY HEIGHTS, NJ 07922-0020
PO BOX 21, BERKELEY HEIGHTS, NJ 07922-0021
PO BOX 22, BERKELEY HEIGHTS, NJ 07922-0022
PO BOX 23, BERKELEY HEIGHTS, NJ 07922-0023
PO BOX 24, BERKELEY HEIGHTS, NJ 07922-0024
PO BOX 25, BERKELEY HEIGHTS, NJ 07922-0025
PO BOX 26, BERKELEY HEIGHTS, NJ 07922-0026
PO BOX 27, BERKELEY HEIGHTS, NJ 07922-0027
PO BOX 28, BERKELEY HEIGHTS, NJ 07922-0028
PO BOX 29, BERKELEY HEIGHTS, NJ 07922-0029
PO BOX 30, BERKELEY HEIGHTS, NJ 07922-0030
PO BOX 31, BERKELEY HEIGHTS, NJ 07922-0031
PO BOX 32, BERKELEY HEIGHTS, NJ 07922-0032
PO BOX 33, BERKELEY HEIGHTS, NJ 07922-0033
PO BOX 34, BERKELEY HEIGHTS, NJ 07922-0034
PO BOX 35, BERKELEY HEIGHTS, NJ 07922-0035
PO BOX 36, BERKELEY HEIGHTS, NJ 07922-0036
PO BOX 37, BERKELEY HEIGHTS, NJ 07922-0037
PO BOX 38, BERKELEY HEIGHTS, NJ 07922-0038
PO BOX 39, BERKELEY HEIGHTS, NJ 07922-0039
PO BOX 40, BERKELEY HEIGHTS, NJ 07922-0040
PO BOX 41, BERKELEY HEIGHTS, NJ 07922-0041
PO BOX 42, BERKELEY HEIGHTS, NJ 07922-0042
PO BOX 43, BERKELEY HEIGHTS, NJ 07922-0043
PO BOX 44, BERKELEY HEIGHTS, NJ 07922-0044
PO BOX 45, BERKELEY HEIGHTS, NJ 07922-0045
PO BOX 46, BERKELEY HEIGHTS, NJ 07922-0046
PO BOX 47, BERKELEY HEIGHTS, NJ 07922-0047
PO BOX 48, BERKELEY HEIGHTS, NJ 07922-0048
PO BOX 49, BERKELEY HEIGHTS, NJ 07922-0049
PO BOX 50, BERKELEY HEIGHTS, NJ 07922-0050
PO BOX 51, BERKELEY HEIGHTS, NJ 07922-0051
PO BOX 52, BERKELEY HEIGHTS, NJ 07922-0052
PO BOX 53, BERKELEY HEIGHTS, NJ 07922-0053
PO BOX 54, BERKELEY HEIGHTS, NJ 07922-0054
PO BOX 55, BERKELEY HEIGHTS, NJ 07922-0055
PO BOX 56, BERKELEY HEIGHTS, NJ 07922-0056
PO BOX 57, BERKELEY HEIGHTS, NJ 07922-0057
PO BOX 58, BERKELEY HEIGHTS, NJ 07922-0058
PO BOX 59, BERKELEY HEIGHTS, NJ 07922-0059
PO BOX 60, BERKELEY HEIGHTS, NJ 07922-0060
PO BOX 61, BERKELEY HEIGHTS, NJ 07922-0061
PO BOX 62, BERKELEY HEIGHTS, NJ 07922-0062
PO BOX 63, BERKELEY HEIGHTS, NJ 07922-0063
PO BOX 64, BERKELEY HEIGHTS, NJ 07922-0064
PO BOX 65, BERKELEY HEIGHTS, NJ 07922-0065
PO BOX 66, BERKELEY HEIGHTS, NJ 07922-0066
PO BOX 67, BERKELEY HEIGHTS, NJ 07922-0067
PO BOX 68, BERKELEY HEIGHTS, NJ 07922-0068
PO BOX 69, BERKELEY HEIGHTS, NJ 07922-0069
PO BOX 70, BERKELEY HEIGHTS, NJ 07922-0070
PO BOX 71, BERKELEY HEIGHTS, NJ 07922-0071
PO BOX 72, BERKELEY HEIGHTS, NJ 07922-0072
PO BOX 73, BERKELEY HEIGHTS, NJ 07922-0073
PO BOX 74, BERKELEY HEIGHTS, NJ 07922-0074
PO BOX 75, BERKELEY HEIGHTS, NJ 07922-0075
PO BOX 76, BERKELEY HEIGHTS, NJ 07922-0076
PO BOX 77, BERKELEY HEIGHTS, NJ 07922-0077
PO BOX 78, BERKELEY HEIGHTS, NJ 07922-0078
PO BOX 79, BERKELEY HEIGHTS, NJ 07922-0079
PO BOX 80, BERKELEY HEIGHTS, NJ 07922-0080
PO BOX 81, BERKELEY HEIGHTS, NJ 07922-0081
PO BOX 82, BERKELEY HEIGHTS, NJ 07922-0082
PO BOX 83, BERKELEY HEIGHTS, NJ 07922-0083
PO BOX 84, BERKELEY HEIGHTS, NJ 07922-0084
PO BOX 85, BERKELEY HEIGHTS, NJ 07922-0085
PO BOX 86, BERKELEY HEIGHTS, NJ 07922-0086
PO BOX 87, BERKELEY HEIGHTS, NJ 07922-0087
PO BOX 88, BERKELEY HEIGHTS, NJ 07922-0088
PO BOX 89, BERKELEY HEIGHTS, NJ 07922-0089
PO BOX 90, BERKELEY HEIGHTS, NJ 07922-0090
PO BOX 91, BERKELEY HEIGHTS, NJ 07922-0091
PO BOX 92, BERKELEY HEIGHTS, NJ 07922-0092
PO BOX 93, BERKELEY HEIGHTS, NJ 07922-0093
PO BOX 94, BERKELEY HEIGHTS, NJ 07922-0094
PO BOX 95, BERKELEY HEIGHTS, NJ 07922-0095
PO BOX 96, BERKELEY HEIGHTS, NJ 07922-0096
PO BOX 97, BERKELEY HEIGHTS, NJ 07922-0097
PO BOX 98, BERKELEY HEIGHTS, NJ 07922-0098
PO BOX 99, BERKELEY HEIGHTS, NJ 07922-0099
PO BOX 100, BERKELEY HEIGHTS, NJ 07922-0100
PO BOX 101, BERKELEY HEIGHTS, NJ 07922-0101
PO BOX 102, BERKELEY HEIGHTS, NJ 07922-0102
PO BOX 103, BERKELEY HEIGHTS, NJ 07922-0103
PO BOX 104, BERKELEY HEIGHTS, NJ 07922-0104
PO BOX 105, BERKELEY HEIGHTS, NJ 07922-0105
PO BOX 106, BERKELEY HEIGHTS, NJ 07922-0106
PO BOX 107, BERKELEY HEIGHTS, NJ 07922-0107
PO BOX 108, BERKELEY HEIGHTS, NJ 07922-0108
PO BOX 109, BERKELEY HEIGHTS, NJ 07922-0109
PO BOX 110, BERKELEY HEIGHTS, NJ 07922-0110
PO BOX 111, BERKELEY HEIGHTS, NJ 07922-0111
PO BOX 112, BERKELEY HEIGHTS, NJ 07922-0112
PO BOX 113, BERKELEY HEIGHTS, NJ 07922-0113
PO BOX 114, BERKELEY HEIGHTS, NJ 07922-0114
PO BOX 115, BERKELEY HEIGHTS, NJ 07922-0115
PO BOX 116, BERKELEY HEIGHTS, NJ 07922-0116
PO BOX 117, BERKELEY HEIGHTS, NJ 07922-0117
PO BOX 118, BERKELEY HEIGHTS, NJ 07922-0118
PO BOX 119, BERKELEY HEIGHTS, NJ 07922-0119
PO BOX 120, BERKELEY HEIGHTS, NJ 07922-0120
PO BOX 121, BERKELEY HEIGHTS, NJ 07922-0121
PO BOX 122, BERKELEY HEIGHTS, NJ 07922-0122
PO BOX 123, BERKELEY HEIGHTS, NJ 07922-0123
PO BOX 124, BERKELEY HEIGHTS, NJ 07922-0124
PO BOX 125, BERKELEY HEIGHTS, NJ 07922-0125
PO BOX 126, BERKELEY HEIGHTS, NJ 07922-0126
PO BOX 127, BERKELEY HEIGHTS, NJ 07922-0127
PO BOX 128, BERKELEY HEIGHTS, NJ 07922-0128
PO BOX 129, BERKELEY HEIGHTS, NJ 07922-0129
PO BOX 130, BERKELEY HEIGHTS, NJ 07922-0130
PO BOX 131, BERKELEY HEIGHTS, NJ 07922-0131
PO BOX 132, BERKELEY HEIGHTS, NJ 07922-0132
PO BOX 133, BERKELEY HEIGHTS, NJ 07922-0133
PO BOX 134, BERKELEY HEIGHTS, NJ 07922-0134
PO BOX 135, BERKELEY HEIGHTS, NJ 07922-0135
PO BOX 136, BERKELEY HEIGHTS, NJ 07922-0136
PO BOX 137, BERKELEY HEIGHTS, NJ 07922-0137
PO BOX 138, BERKELEY HEIGHTS, NJ 07922-0138
PO BOX 139, BERKELEY HEIGHTS, NJ 07922-0139
PO BOX 140, BERKELEY HEIGHTS, NJ 07922-0140
PO BOX 141, BERKELEY HEIGHTS, NJ 07922-0141
PO BOX 142, BERKELEY HEIGHTS, NJ 07922-0142
PO BOX 143, BERKELEY HEIGHTS, NJ 07922-0143
PO BOX 144, BERKELEY HEIGHTS, NJ 07922-0144
PO BOX 145, BERKELEY HEIGHTS, NJ 07922-0145
PO BOX 146, BERKELEY HEIGHTS, NJ 07922-0146
PO BOX 147, BERKELEY HEIGHTS, NJ 07922-0147
PO BOX 148, BERKELEY HEIGHTS, NJ 07922-0148
PO BOX 149, BERKELEY HEIGHTS, NJ 07922-0149
PO BOX 150, BERKELEY HEIGHTS, NJ 07922-0150
PO BOX 151, BERKELEY HEIGHTS, NJ 07922-0151
PO BOX 152, BERKELEY HEIGHTS, NJ 07922-0152
PO BOX 153, BERKELEY HEIGHTS, NJ 07922-0153
PO BOX 154, BERKELEY HEIGHTS, NJ 07922-0154
PO BOX 155, BERKELEY HEIGHTS, NJ 07922-0155
PO BOX 156, BERKELEY HEIGHTS, NJ 07922-0156
PO BOX 157, BERKELEY HEIGHTS, NJ 07922-0157
PO BOX 158, BERKELEY HEIGHTS, NJ 07922-0158
PO BOX 159, BERKELEY HEIGHTS, NJ 07922-0159
PO BOX 160, BERKELEY HEIGHTS, NJ 07922-0160
PO BOX 161, BERKELEY HEIGHTS, NJ 07922-0161
PO BOX 162, BERKELEY HEIGHTS, NJ 07922-0162
PO BOX 163, BERKELEY HEIGHTS, NJ 07922-0163
PO BOX 164, BERKELEY HEIGHTS, NJ 07922-0164
PO BOX 165, BERKELEY HEIGHTS, NJ 07922-0165
PO BOX 166, BERKELEY HEIGHTS, NJ 07922-0166
PO BOX 167, BERKELEY HEIGHTS, NJ 07922-0167
PO BOX 168, BERKELEY HEIGHTS, NJ 07922-0168
PO BOX 169, BERKELEY HEIGHTS, NJ 07922-0169
PO BOX 170, BERKELEY HEIGHTS, NJ 07922-0170
PO BOX 171, BERKELEY HEIGHTS, NJ 07922-0171
PO BOX 172, BERKELEY HEIGHTS, NJ 07922-0172
PO BOX 173, BERKELEY HEIGHTS, NJ 07922-0173
PO BOX 174, BERKELEY HEIGHTS, NJ 07922-0174
PO BOX 175, BERKELEY HEIGHTS, NJ 07922-0175
PO BOX 176, BERKELEY HEIGHTS, NJ 07922-0176
PO BOX 177, BERKELEY HEIGHTS, NJ 07922-0177
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