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, LAKE WORTH BEACH, FL 33460-0001
PO BOX 2, LAKE WORTH BEACH, FL 33460-0002
PO BOX 3, LAKE WORTH BEACH, FL 33460-0003
PO BOX 4, LAKE WORTH BEACH, FL 33460-0004
PO BOX 5, LAKE WORTH BEACH, FL 33460-0005
PO BOX 6, LAKE WORTH BEACH, FL 33460-0006
PO BOX 7, LAKE WORTH BEACH, FL 33460-0007
PO BOX 8, LAKE WORTH BEACH, FL 33460-0008
PO BOX 9, LAKE WORTH BEACH, FL 33460-0009
PO BOX 10, LAKE WORTH BEACH, FL 33460-0010
PO BOX 11, LAKE WORTH BEACH, FL 33460-0011
PO BOX 12, LAKE WORTH BEACH, FL 33460-0012
PO BOX 13, LAKE WORTH BEACH, FL 33460-0013
PO BOX 14, LAKE WORTH BEACH, FL 33460-0014
PO BOX 15, LAKE WORTH BEACH, FL 33460-0015
PO BOX 16, LAKE WORTH BEACH, FL 33460-0016
PO BOX 17, LAKE WORTH BEACH, FL 33460-0017
PO BOX 18, LAKE WORTH BEACH, FL 33460-0018
PO BOX 19, LAKE WORTH BEACH, FL 33460-0019
PO BOX 20, LAKE WORTH BEACH, FL 33460-0020
PO BOX 21, LAKE WORTH BEACH, FL 33460-0021
PO BOX 22, LAKE WORTH BEACH, FL 33460-0022
PO BOX 23, LAKE WORTH BEACH, FL 33460-0023
PO BOX 24, LAKE WORTH BEACH, FL 33460-0024
PO BOX 25, LAKE WORTH BEACH, FL 33460-0025
PO BOX 26, LAKE WORTH BEACH, FL 33460-0026
PO BOX 27, LAKE WORTH BEACH, FL 33460-0027
PO BOX 28, LAKE WORTH BEACH, FL 33460-0028
PO BOX 29, LAKE WORTH BEACH, FL 33460-0029
PO BOX 30, LAKE WORTH BEACH, FL 33460-0030
PO BOX 31, LAKE WORTH BEACH, FL 33460-0031
PO BOX 32, LAKE WORTH BEACH, FL 33460-0032
PO BOX 33, LAKE WORTH BEACH, FL 33460-0033
PO BOX 34, LAKE WORTH BEACH, FL 33460-0034
PO BOX 35, LAKE WORTH BEACH, FL 33460-0035
PO BOX 36, LAKE WORTH BEACH, FL 33460-0036
PO BOX 37, LAKE WORTH BEACH, FL 33460-0037
PO BOX 38, LAKE WORTH BEACH, FL 33460-0038
PO BOX 39, LAKE WORTH BEACH, FL 33460-0039
PO BOX 40, LAKE WORTH BEACH, FL 33460-0040
PO BOX 41, LAKE WORTH BEACH, FL 33460-0041
PO BOX 42, LAKE WORTH BEACH, FL 33460-0042
PO BOX 43, LAKE WORTH BEACH, FL 33460-0043
PO BOX 44, LAKE WORTH BEACH, FL 33460-0044
PO BOX 45, LAKE WORTH BEACH, FL 33460-0045
PO BOX 46, LAKE WORTH BEACH, FL 33460-0046
PO BOX 47, LAKE WORTH BEACH, FL 33460-0047
PO BOX 48, LAKE WORTH BEACH, FL 33460-0048
PO BOX 49, LAKE WORTH BEACH, FL 33460-0049
PO BOX 50, LAKE WORTH BEACH, FL 33460-0050
PO BOX 51, LAKE WORTH BEACH, FL 33460-0051
PO BOX 52, LAKE WORTH BEACH, FL 33460-0052
PO BOX 53, LAKE WORTH BEACH, FL 33460-0053
PO BOX 54, LAKE WORTH BEACH, FL 33460-0054
PO BOX 55, LAKE WORTH BEACH, FL 33460-0055
PO BOX 56, LAKE WORTH BEACH, FL 33460-0056
PO BOX 57, LAKE WORTH BEACH, FL 33460-0057
PO BOX 58, LAKE WORTH BEACH, FL 33460-0058
PO BOX 59, LAKE WORTH BEACH, FL 33460-0059
PO BOX 60, LAKE WORTH BEACH, FL 33460-0060
PO BOX 61, LAKE WORTH BEACH, FL 33460-0061
PO BOX 62, LAKE WORTH BEACH, FL 33460-0062
PO BOX 63, LAKE WORTH BEACH, FL 33460-0063
PO BOX 64, LAKE WORTH BEACH, FL 33460-0064
PO BOX 65, LAKE WORTH BEACH, FL 33460-0065
PO BOX 66, LAKE WORTH BEACH, FL 33460-0066
PO BOX 67, LAKE WORTH BEACH, FL 33460-0067
PO BOX 68, LAKE WORTH BEACH, FL 33460-0068
PO BOX 69, LAKE WORTH BEACH, FL 33460-0069
PO BOX 70, LAKE WORTH BEACH, FL 33460-0070
PO BOX 71, LAKE WORTH BEACH, FL 33460-0071
PO BOX 72, LAKE WORTH BEACH, FL 33460-0072
PO BOX 73, LAKE WORTH BEACH, FL 33460-0073
PO BOX 74, LAKE WORTH BEACH, FL 33460-0074
PO BOX 75, LAKE WORTH BEACH, FL 33460-0075
PO BOX 76, LAKE WORTH BEACH, FL 33460-0076
PO BOX 77, LAKE WORTH BEACH, FL 33460-0077
PO BOX 78, LAKE WORTH BEACH, FL 33460-0078
PO BOX 79, LAKE WORTH BEACH, FL 33460-0079
PO BOX 80, LAKE WORTH BEACH, FL 33460-0080
PO BOX 81, LAKE WORTH BEACH, FL 33460-0081
PO BOX 82, LAKE WORTH BEACH, FL 33460-0082
PO BOX 83, LAKE WORTH BEACH, FL 33460-0083
PO BOX 84, LAKE WORTH BEACH, FL 33460-0084
PO BOX 85, LAKE WORTH BEACH, FL 33460-0085
PO BOX 86, LAKE WORTH BEACH, FL 33460-0086
PO BOX 87, LAKE WORTH BEACH, FL 33460-0087
PO BOX 88, LAKE WORTH BEACH, FL 33460-0088
PO BOX 89, LAKE WORTH BEACH, FL 33460-0089
PO BOX 90, LAKE WORTH BEACH, FL 33460-0090
PO BOX 91, LAKE WORTH BEACH, FL 33460-0091
PO BOX 92, LAKE WORTH BEACH, FL 33460-0092
PO BOX 93, LAKE WORTH BEACH, FL 33460-0093
PO BOX 94, LAKE WORTH BEACH, FL 33460-0094
PO BOX 95, LAKE WORTH BEACH, FL 33460-0095
PO BOX 96, LAKE WORTH BEACH, FL 33460-0096
PO BOX 97, LAKE WORTH BEACH, FL 33460-0097
PO BOX 98, LAKE WORTH BEACH, FL 33460-0098
PO BOX 99, LAKE WORTH BEACH, FL 33460-0099
PO BOX 100, LAKE WORTH BEACH, FL 33460-0100
PO BOX 101, LAKE WORTH BEACH, FL 33460-0101
PO BOX 102, LAKE WORTH BEACH, FL 33460-0102
PO BOX 103, LAKE WORTH BEACH, FL 33460-0103
PO BOX 104, LAKE WORTH BEACH, FL 33460-0104
PO BOX 105, LAKE WORTH BEACH, FL 33460-0105
PO BOX 106, LAKE WORTH BEACH, FL 33460-0106
PO BOX 107, LAKE WORTH BEACH, FL 33460-0107
PO BOX 108, LAKE WORTH BEACH, FL 33460-0108
PO BOX 109, LAKE WORTH BEACH, FL 33460-0109
PO BOX 110, LAKE WORTH BEACH, FL 33460-0110
PO BOX 111, LAKE WORTH BEACH, FL 33460-0111
PO BOX 112, LAKE WORTH BEACH, FL 33460-0112
PO BOX 113, LAKE WORTH BEACH, FL 33460-0113
PO BOX 114, LAKE WORTH BEACH, FL 33460-0114
PO BOX 115, LAKE WORTH BEACH, FL 33460-0115
PO BOX 116, LAKE WORTH BEACH, FL 33460-0116
PO BOX 117, LAKE WORTH BEACH, FL 33460-0117
PO BOX 118, LAKE WORTH BEACH, FL 33460-0118
PO BOX 119, LAKE WORTH BEACH, FL 33460-0119
PO BOX 120, LAKE WORTH BEACH, FL 33460-0120
PO BOX 121, LAKE WORTH BEACH, FL 33460-0121
PO BOX 122, LAKE WORTH BEACH, FL 33460-0122
PO BOX 123, LAKE WORTH BEACH, FL 33460-0123
PO BOX 124, LAKE WORTH BEACH, FL 33460-0124
PO BOX 125, LAKE WORTH BEACH, FL 33460-0125
PO BOX 126, LAKE WORTH BEACH, FL 33460-0126
PO BOX 127, LAKE WORTH BEACH, FL 33460-0127
PO BOX 128, LAKE WORTH BEACH, FL 33460-0128
PO BOX 129, LAKE WORTH BEACH, FL 33460-0129
PO BOX 130, LAKE WORTH BEACH, FL 33460-0130
PO BOX 131, LAKE WORTH BEACH, FL 33460-0131
PO BOX 132, LAKE WORTH BEACH, FL 33460-0132
PO BOX 133, LAKE WORTH BEACH, FL 33460-0133
PO BOX 134, LAKE WORTH BEACH, FL 33460-0134
PO BOX 135, LAKE WORTH BEACH, FL 33460-0135
PO BOX 136, LAKE WORTH BEACH, FL 33460-0136
PO BOX 137, LAKE WORTH BEACH, FL 33460-0137
PO BOX 138, LAKE WORTH BEACH, FL 33460-0138
PO BOX 139, LAKE WORTH BEACH, FL 33460-0139
PO BOX 140, LAKE WORTH BEACH, FL 33460-0140
PO BOX 141, LAKE WORTH BEACH, FL 33460-0141
PO BOX 142, LAKE WORTH BEACH, FL 33460-0142
PO BOX 143, LAKE WORTH BEACH, FL 33460-0143
PO BOX 144, LAKE WORTH BEACH, FL 33460-0144
PO BOX 145, LAKE WORTH BEACH, FL 33460-0145
PO BOX 146, LAKE WORTH BEACH, FL 33460-0146
PO BOX 147, LAKE WORTH BEACH, FL 33460-0147
PO BOX 148, LAKE WORTH BEACH, FL 33460-0148
PO BOX 149, LAKE WORTH BEACH, FL 33460-0149
PO BOX 150, LAKE WORTH BEACH, FL 33460-0150
PO BOX 151, LAKE WORTH BEACH, FL 33460-0151
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