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, BEACH HAVEN, PA 18601-0001
PO BOX 2, BEACH HAVEN, PA 18601-0002
PO BOX 3, BEACH HAVEN, PA 18601-0003
PO BOX 4, BEACH HAVEN, PA 18601-0004
PO BOX 5, BEACH HAVEN, PA 18601-0005
PO BOX 6, BEACH HAVEN, PA 18601-0006
PO BOX 7, BEACH HAVEN, PA 18601-0007
PO BOX 8, BEACH HAVEN, PA 18601-0008
PO BOX 9, BEACH HAVEN, PA 18601-0009
PO BOX 10, BEACH HAVEN, PA 18601-0010
PO BOX 11, BEACH HAVEN, PA 18601-0011
PO BOX 12, BEACH HAVEN, PA 18601-0012
PO BOX 13, BEACH HAVEN, PA 18601-0013
PO BOX 14, BEACH HAVEN, PA 18601-0014
PO BOX 15, BEACH HAVEN, PA 18601-0015
PO BOX 16, BEACH HAVEN, PA 18601-0016
PO BOX 17, BEACH HAVEN, PA 18601-0017
PO BOX 18, BEACH HAVEN, PA 18601-0018
PO BOX 19, BEACH HAVEN, PA 18601-0019
PO BOX 20, BEACH HAVEN, PA 18601-0020
PO BOX 21, BEACH HAVEN, PA 18601-0021
PO BOX 22, BEACH HAVEN, PA 18601-0022
PO BOX 23, BEACH HAVEN, PA 18601-0023
PO BOX 24, BEACH HAVEN, PA 18601-0024
PO BOX 25, BEACH HAVEN, PA 18601-0025
PO BOX 26, BEACH HAVEN, PA 18601-0026
PO BOX 27, BEACH HAVEN, PA 18601-0027
PO BOX 28, BEACH HAVEN, PA 18601-0028
PO BOX 29, BEACH HAVEN, PA 18601-0029
PO BOX 30, BEACH HAVEN, PA 18601-0030
PO BOX 31, BEACH HAVEN, PA 18601-0031
PO BOX 32, BEACH HAVEN, PA 18601-0032
PO BOX 33, BEACH HAVEN, PA 18601-0033
PO BOX 34, BEACH HAVEN, PA 18601-0034
PO BOX 35, BEACH HAVEN, PA 18601-0035
PO BOX 36, BEACH HAVEN, PA 18601-0036
PO BOX 37, BEACH HAVEN, PA 18601-0037
PO BOX 38, BEACH HAVEN, PA 18601-0038
PO BOX 39, BEACH HAVEN, PA 18601-0039
PO BOX 40, BEACH HAVEN, PA 18601-0040
PO BOX 41, BEACH HAVEN, PA 18601-0041
PO BOX 42, BEACH HAVEN, PA 18601-0042
PO BOX 43, BEACH HAVEN, PA 18601-0043
PO BOX 44, BEACH HAVEN, PA 18601-0044
PO BOX 45, BEACH HAVEN, PA 18601-0045
PO BOX 46, BEACH HAVEN, PA 18601-0046
PO BOX 47, BEACH HAVEN, PA 18601-0047
PO BOX 48, BEACH HAVEN, PA 18601-0048
PO BOX 49, BEACH HAVEN, PA 18601-0049
PO BOX 50, BEACH HAVEN, PA 18601-0050
PO BOX 51, BEACH HAVEN, PA 18601-0051
PO BOX 52, BEACH HAVEN, PA 18601-0052
PO BOX 53, BEACH HAVEN, PA 18601-0053
PO BOX 54, BEACH HAVEN, PA 18601-0054
PO BOX 55, BEACH HAVEN, PA 18601-0055
PO BOX 56, BEACH HAVEN, PA 18601-0056
PO BOX 57, BEACH HAVEN, PA 18601-0057
PO BOX 58, BEACH HAVEN, PA 18601-0058
PO BOX 59, BEACH HAVEN, PA 18601-0059
PO BOX 60, BEACH HAVEN, PA 18601-0060
PO BOX 61, BEACH HAVEN, PA 18601-0061
PO BOX 62, BEACH HAVEN, PA 18601-0062
PO BOX 63, BEACH HAVEN, PA 18601-0063
PO BOX 64, BEACH HAVEN, PA 18601-0064
PO BOX 65, BEACH HAVEN, PA 18601-0065
PO BOX 66, BEACH HAVEN, PA 18601-0066
PO BOX 67, BEACH HAVEN, PA 18601-0067
PO BOX 68, BEACH HAVEN, PA 18601-0068
PO BOX 69, BEACH HAVEN, PA 18601-0069
PO BOX 70, BEACH HAVEN, PA 18601-0070
PO BOX 71, BEACH HAVEN, PA 18601-0071
PO BOX 72, BEACH HAVEN, PA 18601-0072
PO BOX 73, BEACH HAVEN, PA 18601-0073
PO BOX 74, BEACH HAVEN, PA 18601-0074
PO BOX 75, BEACH HAVEN, PA 18601-0075
PO BOX 76, BEACH HAVEN, PA 18601-0076
PO BOX 77, BEACH HAVEN, PA 18601-0077
PO BOX 78, BEACH HAVEN, PA 18601-0078
PO BOX 79, BEACH HAVEN, PA 18601-0079
PO BOX 80, BEACH HAVEN, PA 18601-0080
PO BOX 81, BEACH HAVEN, PA 18601-0081
PO BOX 82, BEACH HAVEN, PA 18601-0082
PO BOX 83, BEACH HAVEN, PA 18601-0083
PO BOX 84, BEACH HAVEN, PA 18601-0084
PO BOX 85, BEACH HAVEN, PA 18601-0085
PO BOX 86, BEACH HAVEN, PA 18601-0086
PO BOX 87, BEACH HAVEN, PA 18601-0087
PO BOX 88, BEACH HAVEN, PA 18601-0088
PO BOX 89, BEACH HAVEN, PA 18601-0089
PO BOX 90, BEACH HAVEN, PA 18601-0090
PO BOX 91, BEACH HAVEN, PA 18601-0091
PO BOX 92, BEACH HAVEN, PA 18601-0092
PO BOX 93, BEACH HAVEN, PA 18601-0093
PO BOX 94, BEACH HAVEN, PA 18601-0094
PO BOX 95, BEACH HAVEN, PA 18601-0095
PO BOX 96, BEACH HAVEN, PA 18601-0096
PO BOX 97, BEACH HAVEN, PA 18601-0097
PO BOX 98, BEACH HAVEN, PA 18601-0098
PO BOX 99, BEACH HAVEN, PA 18601-0099
PO BOX 100, BEACH HAVEN, PA 18601-0100
PO BOX 101, BEACH HAVEN, PA 18601-0101
PO BOX 102, BEACH HAVEN, PA 18601-0102
PO BOX 103, BEACH HAVEN, PA 18601-0103
PO BOX 104, BEACH HAVEN, PA 18601-0104
PO BOX 105, BEACH HAVEN, PA 18601-0105
PO BOX 106, BEACH HAVEN, PA 18601-0106
PO BOX 107, BEACH HAVEN, PA 18601-0107
PO BOX 108, BEACH HAVEN, PA 18601-0108
PO BOX 109, BEACH HAVEN, PA 18601-0109
PO BOX 110, BEACH HAVEN, PA 18601-0110
PO BOX 111, BEACH HAVEN, PA 18601-0111
PO BOX 112, BEACH HAVEN, PA 18601-0112
PO BOX 113, BEACH HAVEN, PA 18601-0113
PO BOX 114, BEACH HAVEN, PA 18601-0114
PO BOX 115, BEACH HAVEN, PA 18601-0115
PO BOX 116, BEACH HAVEN, PA 18601-0116
PO BOX 117, BEACH HAVEN, PA 18601-0117
PO BOX 118, BEACH HAVEN, PA 18601-0118
PO BOX 119, BEACH HAVEN, PA 18601-0119
PO BOX 120, BEACH HAVEN, PA 18601-0120
PO BOX 121, BEACH HAVEN, PA 18601-0121
PO BOX 122, BEACH HAVEN, PA 18601-0122
PO BOX 123, BEACH HAVEN, PA 18601-0123
PO BOX 124, BEACH HAVEN, PA 18601-0124
PO BOX 125, BEACH HAVEN, PA 18601-0125
PO BOX 126, BEACH HAVEN, PA 18601-0126
PO BOX 127, BEACH HAVEN, PA 18601-0127
PO BOX 128, BEACH HAVEN, PA 18601-0128
PO BOX 129, BEACH HAVEN, PA 18601-0129
PO BOX 130, BEACH HAVEN, PA 18601-0130
PO BOX 131, BEACH HAVEN, PA 18601-0131
PO BOX 132, BEACH HAVEN, PA 18601-0132
PO BOX 133, BEACH HAVEN, PA 18601-0133
PO BOX 134, BEACH HAVEN, PA 18601-0134
PO BOX 135, BEACH HAVEN, PA 18601-0135
PO BOX 136, BEACH HAVEN, PA 18601-0136
PO BOX 137, BEACH HAVEN, PA 18601-0137
PO BOX 138, BEACH HAVEN, PA 18601-0138
PO BOX 139, BEACH HAVEN, PA 18601-0139
PO BOX 140, BEACH HAVEN, PA 18601-0140
PO BOX 141, BEACH HAVEN, PA 18601-0141
PO BOX 142, BEACH HAVEN, PA 18601-0142
PO BOX 143, BEACH HAVEN, PA 18601-0143
PO BOX 144, BEACH HAVEN, PA 18601-0144
PO BOX 145, BEACH HAVEN, PA 18601-0145
PO BOX 146, BEACH HAVEN, PA 18601-0146
PO BOX 147, BEACH HAVEN, PA 18601-0147
PO BOX 148, BEACH HAVEN, PA 18601-0148
PO BOX 149, BEACH HAVEN, PA 18601-0149
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