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, RIDGEFIELD PARK, NJ 07660-0001
PO BOX 2, RIDGEFIELD PARK, NJ 07660-0002
PO BOX 3, RIDGEFIELD PARK, NJ 07660-0003
PO BOX 4, RIDGEFIELD PARK, NJ 07660-0004
PO BOX 5, RIDGEFIELD PARK, NJ 07660-0005
PO BOX 6, RIDGEFIELD PARK, NJ 07660-0006
PO BOX 7, RIDGEFIELD PARK, NJ 07660-0007
PO BOX 8, RIDGEFIELD PARK, NJ 07660-0008
PO BOX 9, RIDGEFIELD PARK, NJ 07660-0009
PO BOX 10, RIDGEFIELD PARK, NJ 07660-0010
PO BOX 11, RIDGEFIELD PARK, NJ 07660-0011
PO BOX 12, RIDGEFIELD PARK, NJ 07660-0012
PO BOX 13, RIDGEFIELD PARK, NJ 07660-0013
PO BOX 14, RIDGEFIELD PARK, NJ 07660-0014
PO BOX 15, RIDGEFIELD PARK, NJ 07660-0015
PO BOX 16, RIDGEFIELD PARK, NJ 07660-0016
PO BOX 17, RIDGEFIELD PARK, NJ 07660-0017
PO BOX 18, RIDGEFIELD PARK, NJ 07660-0018
PO BOX 19, RIDGEFIELD PARK, NJ 07660-0019
PO BOX 20, RIDGEFIELD PARK, NJ 07660-0020
PO BOX 21, RIDGEFIELD PARK, NJ 07660-0021
PO BOX 22, RIDGEFIELD PARK, NJ 07660-0022
PO BOX 23, RIDGEFIELD PARK, NJ 07660-0023
PO BOX 24, RIDGEFIELD PARK, NJ 07660-0024
PO BOX 25, RIDGEFIELD PARK, NJ 07660-0025
PO BOX 26, RIDGEFIELD PARK, NJ 07660-0026
PO BOX 27, RIDGEFIELD PARK, NJ 07660-0027
PO BOX 28, RIDGEFIELD PARK, NJ 07660-0028
PO BOX 29, RIDGEFIELD PARK, NJ 07660-0029
PO BOX 30, RIDGEFIELD PARK, NJ 07660-0030
PO BOX 31, RIDGEFIELD PARK, NJ 07660-0031
PO BOX 32, RIDGEFIELD PARK, NJ 07660-0032
PO BOX 33, RIDGEFIELD PARK, NJ 07660-0033
PO BOX 34, RIDGEFIELD PARK, NJ 07660-0034
PO BOX 35, RIDGEFIELD PARK, NJ 07660-0035
PO BOX 36, RIDGEFIELD PARK, NJ 07660-0036
PO BOX 37, RIDGEFIELD PARK, NJ 07660-0037
PO BOX 38, RIDGEFIELD PARK, NJ 07660-0038
PO BOX 39, RIDGEFIELD PARK, NJ 07660-0039
PO BOX 40, RIDGEFIELD PARK, NJ 07660-0040
PO BOX 41, RIDGEFIELD PARK, NJ 07660-0041
PO BOX 42, RIDGEFIELD PARK, NJ 07660-0042
PO BOX 43, RIDGEFIELD PARK, NJ 07660-0043
PO BOX 44, RIDGEFIELD PARK, NJ 07660-0044
PO BOX 45, RIDGEFIELD PARK, NJ 07660-0045
PO BOX 46, RIDGEFIELD PARK, NJ 07660-0046
PO BOX 47, RIDGEFIELD PARK, NJ 07660-0047
PO BOX 48, RIDGEFIELD PARK, NJ 07660-0048
PO BOX 49, RIDGEFIELD PARK, NJ 07660-0049
PO BOX 50, RIDGEFIELD PARK, NJ 07660-0050
PO BOX 51, RIDGEFIELD PARK, NJ 07660-0051
PO BOX 52, RIDGEFIELD PARK, NJ 07660-0052
PO BOX 53, RIDGEFIELD PARK, NJ 07660-0053
PO BOX 54, RIDGEFIELD PARK, NJ 07660-0054
PO BOX 55, RIDGEFIELD PARK, NJ 07660-0055
PO BOX 56, RIDGEFIELD PARK, NJ 07660-0056
PO BOX 57, RIDGEFIELD PARK, NJ 07660-0057
PO BOX 58, RIDGEFIELD PARK, NJ 07660-0058
PO BOX 59, RIDGEFIELD PARK, NJ 07660-0059
PO BOX 60, RIDGEFIELD PARK, NJ 07660-0060
PO BOX 61, RIDGEFIELD PARK, NJ 07660-0061
PO BOX 62, RIDGEFIELD PARK, NJ 07660-0062
PO BOX 63, RIDGEFIELD PARK, NJ 07660-0063
PO BOX 64, RIDGEFIELD PARK, NJ 07660-0064
PO BOX 65, RIDGEFIELD PARK, NJ 07660-0065
PO BOX 66, RIDGEFIELD PARK, NJ 07660-0066
PO BOX 67, RIDGEFIELD PARK, NJ 07660-0067
PO BOX 68, RIDGEFIELD PARK, NJ 07660-0068
PO BOX 69, RIDGEFIELD PARK, NJ 07660-0069
PO BOX 70, RIDGEFIELD PARK, NJ 07660-0070
PO BOX 71, RIDGEFIELD PARK, NJ 07660-0071
PO BOX 72, RIDGEFIELD PARK, NJ 07660-0072
PO BOX 73, RIDGEFIELD PARK, NJ 07660-0073
PO BOX 74, RIDGEFIELD PARK, NJ 07660-0074
PO BOX 75, RIDGEFIELD PARK, NJ 07660-0075
PO BOX 76, RIDGEFIELD PARK, NJ 07660-0076
PO BOX 77, RIDGEFIELD PARK, NJ 07660-0077
PO BOX 78, RIDGEFIELD PARK, NJ 07660-0078
PO BOX 79, RIDGEFIELD PARK, NJ 07660-0079
PO BOX 80, RIDGEFIELD PARK, NJ 07660-0080
PO BOX 81, RIDGEFIELD PARK, NJ 07660-0081
PO BOX 82, RIDGEFIELD PARK, NJ 07660-0082
PO BOX 83, RIDGEFIELD PARK, NJ 07660-0083
PO BOX 84, RIDGEFIELD PARK, NJ 07660-0084
PO BOX 85, RIDGEFIELD PARK, NJ 07660-0085
PO BOX 86, RIDGEFIELD PARK, NJ 07660-0086
PO BOX 87, RIDGEFIELD PARK, NJ 07660-0087
PO BOX 88, RIDGEFIELD PARK, NJ 07660-0088
PO BOX 89, RIDGEFIELD PARK, NJ 07660-0089
PO BOX 90, RIDGEFIELD PARK, NJ 07660-0090
PO BOX 91, RIDGEFIELD PARK, NJ 07660-0091
PO BOX 92, RIDGEFIELD PARK, NJ 07660-0092
PO BOX 93, RIDGEFIELD PARK, NJ 07660-0093
PO BOX 94, RIDGEFIELD PARK, NJ 07660-0094
PO BOX 95, RIDGEFIELD PARK, NJ 07660-0095
PO BOX 96, RIDGEFIELD PARK, NJ 07660-0096
PO BOX 97, RIDGEFIELD PARK, NJ 07660-0097
PO BOX 98, RIDGEFIELD PARK, NJ 07660-0098
PO BOX 99, RIDGEFIELD PARK, NJ 07660-0099
PO BOX 100, RIDGEFIELD PARK, NJ 07660-0100
PO BOX 101, RIDGEFIELD PARK, NJ 07660-0101
PO BOX 102, RIDGEFIELD PARK, NJ 07660-0102
PO BOX 103, RIDGEFIELD PARK, NJ 07660-0103
PO BOX 104, RIDGEFIELD PARK, NJ 07660-0104
PO BOX 105, RIDGEFIELD PARK, NJ 07660-0105
PO BOX 106, RIDGEFIELD PARK, NJ 07660-0106
PO BOX 107, RIDGEFIELD PARK, NJ 07660-0107
PO BOX 108, RIDGEFIELD PARK, NJ 07660-0108
PO BOX 109, RIDGEFIELD PARK, NJ 07660-0109
PO BOX 110, RIDGEFIELD PARK, NJ 07660-0110
PO BOX 111, RIDGEFIELD PARK, NJ 07660-0111
PO BOX 112, RIDGEFIELD PARK, NJ 07660-0112
PO BOX 113, RIDGEFIELD PARK, NJ 07660-0113
PO BOX 114, RIDGEFIELD PARK, NJ 07660-0114
PO BOX 115, RIDGEFIELD PARK, NJ 07660-0115
PO BOX 116, RIDGEFIELD PARK, NJ 07660-0116
PO BOX 117, RIDGEFIELD PARK, NJ 07660-0117
PO BOX 118, RIDGEFIELD PARK, NJ 07660-0118
PO BOX 119, RIDGEFIELD PARK, NJ 07660-0119
PO BOX 120, RIDGEFIELD PARK, NJ 07660-0120
PO BOX 121, RIDGEFIELD PARK, NJ 07660-0121
PO BOX 122, RIDGEFIELD PARK, NJ 07660-0122
PO BOX 123, RIDGEFIELD PARK, NJ 07660-0123
PO BOX 124, RIDGEFIELD PARK, NJ 07660-0124
PO BOX 125, RIDGEFIELD PARK, NJ 07660-0125
PO BOX 126, RIDGEFIELD PARK, NJ 07660-0126
PO BOX 127, RIDGEFIELD PARK, NJ 07660-0127
PO BOX 128, RIDGEFIELD PARK, NJ 07660-0128
PO BOX 129, RIDGEFIELD PARK, NJ 07660-0129
PO BOX 130, RIDGEFIELD PARK, NJ 07660-0130
PO BOX 131, RIDGEFIELD PARK, NJ 07660-0131
PO BOX 132, RIDGEFIELD PARK, NJ 07660-0132
PO BOX 133, RIDGEFIELD PARK, NJ 07660-0133
PO BOX 134, RIDGEFIELD PARK, NJ 07660-0134
PO BOX 135, RIDGEFIELD PARK, NJ 07660-0135
PO BOX 136, RIDGEFIELD PARK, NJ 07660-0136
PO BOX 137, RIDGEFIELD PARK, NJ 07660-0137
PO BOX 138, RIDGEFIELD PARK, NJ 07660-0138
PO BOX 139, RIDGEFIELD PARK, NJ 07660-0139
PO BOX 140, RIDGEFIELD PARK, NJ 07660-0140
PO BOX 141, RIDGEFIELD PARK, NJ 07660-0141
PO BOX 142, RIDGEFIELD PARK, NJ 07660-0142
PO BOX 143, RIDGEFIELD PARK, NJ 07660-0143
PO BOX 144, RIDGEFIELD PARK, NJ 07660-0144
PO BOX 145, RIDGEFIELD PARK, NJ 07660-0145
PO BOX 146, RIDGEFIELD PARK, NJ 07660-0146
PO BOX 147, RIDGEFIELD PARK, NJ 07660-0147
PO BOX 148, RIDGEFIELD PARK, NJ 07660-0148
PO BOX 149, RIDGEFIELD PARK, NJ 07660-0149
PO BOX 150, RIDGEFIELD PARK, NJ 07660-0150
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