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 1, MONROE TOWNSHIP, NJ 08831-0001
PO BOX 2, MONROE TOWNSHIP, NJ 08831-0002
PO BOX 3, MONROE TOWNSHIP, NJ 08831-0003
PO BOX 4, MONROE TOWNSHIP, NJ 08831-0004
PO BOX 5, MONROE TOWNSHIP, NJ 08831-0005
PO BOX 6, MONROE TOWNSHIP, NJ 08831-0006
PO BOX 7, MONROE TOWNSHIP, NJ 08831-0007
PO BOX 8, MONROE TOWNSHIP, NJ 08831-0008
PO BOX 9, MONROE TOWNSHIP, NJ 08831-0009
PO BOX 10, MONROE TOWNSHIP, NJ 08831-0010
PO BOX 11, MONROE TOWNSHIP, NJ 08831-0011
PO BOX 12, MONROE TOWNSHIP, NJ 08831-0012
PO BOX 13, MONROE TOWNSHIP, NJ 08831-0013
PO BOX 14, MONROE TOWNSHIP, NJ 08831-0014
PO BOX 15, MONROE TOWNSHIP, NJ 08831-0015
PO BOX 16, MONROE TOWNSHIP, NJ 08831-0016
PO BOX 17, MONROE TOWNSHIP, NJ 08831-0017
PO BOX 18, MONROE TOWNSHIP, NJ 08831-0018
PO BOX 19, MONROE TOWNSHIP, NJ 08831-0019
PO BOX 20, MONROE TOWNSHIP, NJ 08831-0020
PO BOX 21, MONROE TOWNSHIP, NJ 08831-0021
PO BOX 22, MONROE TOWNSHIP, NJ 08831-0022
PO BOX 23, MONROE TOWNSHIP, NJ 08831-0023
PO BOX 24, MONROE TOWNSHIP, NJ 08831-0024
PO BOX 25, MONROE TOWNSHIP, NJ 08831-0025
PO BOX 26, MONROE TOWNSHIP, NJ 08831-0026
PO BOX 27, MONROE TOWNSHIP, NJ 08831-0027
PO BOX 28, MONROE TOWNSHIP, NJ 08831-0028
PO BOX 29, MONROE TOWNSHIP, NJ 08831-0029
PO BOX 30, MONROE TOWNSHIP, NJ 08831-0030
PO BOX 31, MONROE TOWNSHIP, NJ 08831-0031
PO BOX 32, MONROE TOWNSHIP, NJ 08831-0032
PO BOX 33, MONROE TOWNSHIP, NJ 08831-0033
PO BOX 34, MONROE TOWNSHIP, NJ 08831-0034
PO BOX 35, MONROE TOWNSHIP, NJ 08831-0035
PO BOX 36, MONROE TOWNSHIP, NJ 08831-0036
PO BOX 37, MONROE TOWNSHIP, NJ 08831-0037
PO BOX 38, MONROE TOWNSHIP, NJ 08831-0038
PO BOX 39, MONROE TOWNSHIP, NJ 08831-0039
PO BOX 40, MONROE TOWNSHIP, NJ 08831-0040
PO BOX 41, MONROE TOWNSHIP, NJ 08831-0041
PO BOX 42, MONROE TOWNSHIP, NJ 08831-0042
PO BOX 43, MONROE TOWNSHIP, NJ 08831-0043
PO BOX 44, MONROE TOWNSHIP, NJ 08831-0044
PO BOX 45, MONROE TOWNSHIP, NJ 08831-0045
PO BOX 46, MONROE TOWNSHIP, NJ 08831-0046
PO BOX 47, MONROE TOWNSHIP, NJ 08831-0047
PO BOX 48, MONROE TOWNSHIP, NJ 08831-0048
PO BOX 49, MONROE TOWNSHIP, NJ 08831-0049
PO BOX 50, MONROE TOWNSHIP, NJ 08831-0050
PO BOX 51, MONROE TOWNSHIP, NJ 08831-0051
PO BOX 52, MONROE TOWNSHIP, NJ 08831-0052
PO BOX 53, MONROE TOWNSHIP, NJ 08831-0053
PO BOX 54, MONROE TOWNSHIP, NJ 08831-0054
PO BOX 55, MONROE TOWNSHIP, NJ 08831-0055
PO BOX 56, MONROE TOWNSHIP, NJ 08831-0056
PO BOX 57, MONROE TOWNSHIP, NJ 08831-0057
PO BOX 58, MONROE TOWNSHIP, NJ 08831-0058
PO BOX 59, MONROE TOWNSHIP, NJ 08831-0059
PO BOX 60, MONROE TOWNSHIP, NJ 08831-0060
PO BOX 61, MONROE TOWNSHIP, NJ 08831-0061
PO BOX 62, MONROE TOWNSHIP, NJ 08831-0062
PO BOX 63, MONROE TOWNSHIP, NJ 08831-0063
PO BOX 64, MONROE TOWNSHIP, NJ 08831-0064
PO BOX 65, MONROE TOWNSHIP, NJ 08831-0065
PO BOX 66, MONROE TOWNSHIP, NJ 08831-0066
PO BOX 67, MONROE TOWNSHIP, NJ 08831-0067
PO BOX 68, MONROE TOWNSHIP, NJ 08831-0068
PO BOX 69, MONROE TOWNSHIP, NJ 08831-0069
PO BOX 70, MONROE TOWNSHIP, NJ 08831-0070
PO BOX 71, MONROE TOWNSHIP, NJ 08831-0071
PO BOX 72, MONROE TOWNSHIP, NJ 08831-0072
PO BOX 73, MONROE TOWNSHIP, NJ 08831-0073
PO BOX 74, MONROE TOWNSHIP, NJ 08831-0074
PO BOX 75, MONROE TOWNSHIP, NJ 08831-0075
PO BOX 76, MONROE TOWNSHIP, NJ 08831-0076
PO BOX 77, MONROE TOWNSHIP, NJ 08831-0077
PO BOX 78, MONROE TOWNSHIP, NJ 08831-0078
PO BOX 79, MONROE TOWNSHIP, NJ 08831-0079
PO BOX 80, MONROE TOWNSHIP, NJ 08831-0080
PO BOX 81, MONROE TOWNSHIP, NJ 08831-0081
PO BOX 82, MONROE TOWNSHIP, NJ 08831-0082
PO BOX 83, MONROE TOWNSHIP, NJ 08831-0083
PO BOX 84, MONROE TOWNSHIP, NJ 08831-0084
PO BOX 85, MONROE TOWNSHIP, NJ 08831-0085
PO BOX 86, MONROE TOWNSHIP, NJ 08831-0086
PO BOX 87, MONROE TOWNSHIP, NJ 08831-0087
PO BOX 88, MONROE TOWNSHIP, NJ 08831-0088
PO BOX 89, MONROE TOWNSHIP, NJ 08831-0089
PO BOX 90, MONROE TOWNSHIP, NJ 08831-0090
PO BOX 91, MONROE TOWNSHIP, NJ 08831-0091
PO BOX 92, MONROE TOWNSHIP, NJ 08831-0092
PO BOX 93, MONROE TOWNSHIP, NJ 08831-0093
PO BOX 94, MONROE TOWNSHIP, NJ 08831-0094
PO BOX 95, MONROE TOWNSHIP, NJ 08831-0095
PO BOX 96, MONROE TOWNSHIP, NJ 08831-0096
PO BOX 97, MONROE TOWNSHIP, NJ 08831-0097
PO BOX 98, MONROE TOWNSHIP, NJ 08831-0098
PO BOX 99, MONROE TOWNSHIP, NJ 08831-0099
PO BOX 100, MONROE TOWNSHIP, NJ 08831-0100
PO BOX 101, MONROE TOWNSHIP, NJ 08831-0101
PO BOX 102, MONROE TOWNSHIP, NJ 08831-0102
PO BOX 103, MONROE TOWNSHIP, NJ 08831-0103
PO BOX 104, MONROE TOWNSHIP, NJ 08831-0104
PO BOX 105, MONROE TOWNSHIP, NJ 08831-0105
PO BOX 106, MONROE TOWNSHIP, NJ 08831-0106
PO BOX 107, MONROE TOWNSHIP, NJ 08831-0107
PO BOX 108, MONROE TOWNSHIP, NJ 08831-0108
PO BOX 109, MONROE TOWNSHIP, NJ 08831-0109
PO BOX 110, MONROE TOWNSHIP, NJ 08831-0110
PO BOX 111, MONROE TOWNSHIP, NJ 08831-0111
PO BOX 112, MONROE TOWNSHIP, NJ 08831-0112
PO BOX 113, MONROE TOWNSHIP, NJ 08831-0113
PO BOX 114, MONROE TOWNSHIP, NJ 08831-0114
PO BOX 115, MONROE TOWNSHIP, NJ 08831-0115
PO BOX 116, MONROE TOWNSHIP, NJ 08831-0116
PO BOX 117, MONROE TOWNSHIP, NJ 08831-0117
PO BOX 118, MONROE TOWNSHIP, NJ 08831-0118
PO BOX 119, MONROE TOWNSHIP, NJ 08831-0119
PO BOX 120, MONROE TOWNSHIP, NJ 08831-0120
PO BOX 121, MONROE TOWNSHIP, NJ 08831-0121
PO BOX 122, MONROE TOWNSHIP, NJ 08831-0122
PO BOX 123, MONROE TOWNSHIP, NJ 08831-0123
PO BOX 124, MONROE TOWNSHIP, NJ 08831-0124
PO BOX 125, MONROE TOWNSHIP, NJ 08831-0125
PO BOX 126, MONROE TOWNSHIP, NJ 08831-0126
PO BOX 127, MONROE TOWNSHIP, NJ 08831-0127
PO BOX 128, MONROE TOWNSHIP, NJ 08831-0128
PO BOX 129, MONROE TOWNSHIP, NJ 08831-0129
PO BOX 130, MONROE TOWNSHIP, NJ 08831-0130
PO BOX 131, MONROE TOWNSHIP, NJ 08831-0131
PO BOX 132, MONROE TOWNSHIP, NJ 08831-0132
PO BOX 133, MONROE TOWNSHIP, NJ 08831-0133
PO BOX 134, MONROE TOWNSHIP, NJ 08831-0134
PO BOX 135, MONROE TOWNSHIP, NJ 08831-0135
PO BOX 136, MONROE TOWNSHIP, NJ 08831-0136
PO BOX 137, MONROE TOWNSHIP, NJ 08831-0137
PO BOX 138, MONROE TOWNSHIP, NJ 08831-0138
PO BOX 139, MONROE TOWNSHIP, NJ 08831-0139
PO BOX 140, MONROE TOWNSHIP, NJ 08831-0140
PO BOX 141, MONROE TOWNSHIP, NJ 08831-0141
PO BOX 142, MONROE TOWNSHIP, NJ 08831-0142
PO BOX 143, MONROE TOWNSHIP, NJ 08831-0143
PO BOX 144, MONROE TOWNSHIP, NJ 08831-0144
PO BOX 145, MONROE TOWNSHIP, NJ 08831-0145
PO BOX 146, MONROE TOWNSHIP, NJ 08831-0146
PO BOX 147, MONROE TOWNSHIP, NJ 08831-0147
PO BOX 148, MONROE TOWNSHIP, NJ 08831-0148
PO BOX 149, MONROE TOWNSHIP, NJ 08831-0149
PO BOX 150, MONROE TOWNSHIP, NJ 08831-0150
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