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, ELIZABETHTOWN, PA 17022-0001
PO BOX 2, ELIZABETHTOWN, PA 17022-0002
PO BOX 3, ELIZABETHTOWN, PA 17022-0003
PO BOX 4, ELIZABETHTOWN, PA 17022-0004
PO BOX 5, ELIZABETHTOWN, PA 17022-0005
PO BOX 6, ELIZABETHTOWN, PA 17022-0006
PO BOX 7, ELIZABETHTOWN, PA 17022-0007
PO BOX 8, ELIZABETHTOWN, PA 17022-0008
PO BOX 9, ELIZABETHTOWN, PA 17022-0009
PO BOX 10, ELIZABETHTOWN, PA 17022-0010
PO BOX 11, ELIZABETHTOWN, PA 17022-0011
PO BOX 12, ELIZABETHTOWN, PA 17022-0012
PO BOX 13, ELIZABETHTOWN, PA 17022-0013
PO BOX 14, ELIZABETHTOWN, PA 17022-0014
PO BOX 15, ELIZABETHTOWN, PA 17022-0015
PO BOX 16, ELIZABETHTOWN, PA 17022-0016
PO BOX 17, ELIZABETHTOWN, PA 17022-0017
PO BOX 18, ELIZABETHTOWN, PA 17022-0018
PO BOX 19, ELIZABETHTOWN, PA 17022-0019
PO BOX 20, ELIZABETHTOWN, PA 17022-0020
PO BOX 21, ELIZABETHTOWN, PA 17022-0021
PO BOX 22, ELIZABETHTOWN, PA 17022-0022
PO BOX 23, ELIZABETHTOWN, PA 17022-0023
PO BOX 24, ELIZABETHTOWN, PA 17022-0024
PO BOX 25, ELIZABETHTOWN, PA 17022-0025
PO BOX 26, ELIZABETHTOWN, PA 17022-0026
PO BOX 27, ELIZABETHTOWN, PA 17022-0027
PO BOX 28, ELIZABETHTOWN, PA 17022-0028
PO BOX 29, ELIZABETHTOWN, PA 17022-0029
PO BOX 30, ELIZABETHTOWN, PA 17022-0030
PO BOX 31, ELIZABETHTOWN, PA 17022-0031
PO BOX 32, ELIZABETHTOWN, PA 17022-0032
PO BOX 33, ELIZABETHTOWN, PA 17022-0033
PO BOX 34, ELIZABETHTOWN, PA 17022-0034
PO BOX 35, ELIZABETHTOWN, PA 17022-0035
PO BOX 36, ELIZABETHTOWN, PA 17022-0036
PO BOX 37, ELIZABETHTOWN, PA 17022-0037
PO BOX 38, ELIZABETHTOWN, PA 17022-0038
PO BOX 39, ELIZABETHTOWN, PA 17022-0039
PO BOX 40, ELIZABETHTOWN, PA 17022-0040
PO BOX 41, ELIZABETHTOWN, PA 17022-0041
PO BOX 42, ELIZABETHTOWN, PA 17022-0042
PO BOX 43, ELIZABETHTOWN, PA 17022-0043
PO BOX 44, ELIZABETHTOWN, PA 17022-0044
PO BOX 45, ELIZABETHTOWN, PA 17022-0045
PO BOX 46, ELIZABETHTOWN, PA 17022-0046
PO BOX 47, ELIZABETHTOWN, PA 17022-0047
PO BOX 48, ELIZABETHTOWN, PA 17022-0048
PO BOX 49, ELIZABETHTOWN, PA 17022-0049
PO BOX 50, ELIZABETHTOWN, PA 17022-0050
PO BOX 51, ELIZABETHTOWN, PA 17022-0051
PO BOX 52, ELIZABETHTOWN, PA 17022-0052
PO BOX 53, ELIZABETHTOWN, PA 17022-0053
PO BOX 54, ELIZABETHTOWN, PA 17022-0054
PO BOX 55, ELIZABETHTOWN, PA 17022-0055
PO BOX 56, ELIZABETHTOWN, PA 17022-0056
PO BOX 57, ELIZABETHTOWN, PA 17022-0057
PO BOX 58, ELIZABETHTOWN, PA 17022-0058
PO BOX 59, ELIZABETHTOWN, PA 17022-0059
PO BOX 60, ELIZABETHTOWN, PA 17022-0060
PO BOX 61, ELIZABETHTOWN, PA 17022-0061
PO BOX 62, ELIZABETHTOWN, PA 17022-0062
PO BOX 63, ELIZABETHTOWN, PA 17022-0063
PO BOX 64, ELIZABETHTOWN, PA 17022-0064
PO BOX 65, ELIZABETHTOWN, PA 17022-0065
PO BOX 66, ELIZABETHTOWN, PA 17022-0066
PO BOX 67, ELIZABETHTOWN, PA 17022-0067
PO BOX 68, ELIZABETHTOWN, PA 17022-0068
PO BOX 69, ELIZABETHTOWN, PA 17022-0069
PO BOX 70, ELIZABETHTOWN, PA 17022-0070
PO BOX 71, ELIZABETHTOWN, PA 17022-0071
PO BOX 72, ELIZABETHTOWN, PA 17022-0072
PO BOX 73, ELIZABETHTOWN, PA 17022-0073
PO BOX 74, ELIZABETHTOWN, PA 17022-0074
PO BOX 75, ELIZABETHTOWN, PA 17022-0075
PO BOX 76, ELIZABETHTOWN, PA 17022-0076
PO BOX 77, ELIZABETHTOWN, PA 17022-0077
PO BOX 78, ELIZABETHTOWN, PA 17022-0078
PO BOX 79, ELIZABETHTOWN, PA 17022-0079
PO BOX 80, ELIZABETHTOWN, PA 17022-0080
PO BOX 81, ELIZABETHTOWN, PA 17022-0081
PO BOX 82, ELIZABETHTOWN, PA 17022-0082
PO BOX 83, ELIZABETHTOWN, PA 17022-0083
PO BOX 84, ELIZABETHTOWN, PA 17022-0084
PO BOX 85, ELIZABETHTOWN, PA 17022-0085
PO BOX 86, ELIZABETHTOWN, PA 17022-0086
PO BOX 87, ELIZABETHTOWN, PA 17022-0087
PO BOX 88, ELIZABETHTOWN, PA 17022-0088
PO BOX 89, ELIZABETHTOWN, PA 17022-0089
PO BOX 90, ELIZABETHTOWN, PA 17022-0090
PO BOX 91, ELIZABETHTOWN, PA 17022-0091
PO BOX 92, ELIZABETHTOWN, PA 17022-0092
PO BOX 93, ELIZABETHTOWN, PA 17022-0093
PO BOX 94, ELIZABETHTOWN, PA 17022-0094
PO BOX 95, ELIZABETHTOWN, PA 17022-0095
PO BOX 96, ELIZABETHTOWN, PA 17022-0096
PO BOX 97, ELIZABETHTOWN, PA 17022-0097
PO BOX 98, ELIZABETHTOWN, PA 17022-0098
PO BOX 99, ELIZABETHTOWN, PA 17022-0099
PO BOX 100, ELIZABETHTOWN, PA 17022-0100
PO BOX 101, ELIZABETHTOWN, PA 17022-0101
PO BOX 102, ELIZABETHTOWN, PA 17022-0102
PO BOX 103, ELIZABETHTOWN, PA 17022-0103
PO BOX 104, ELIZABETHTOWN, PA 17022-0104
PO BOX 105, ELIZABETHTOWN, PA 17022-0105
PO BOX 106, ELIZABETHTOWN, PA 17022-0106
PO BOX 107, ELIZABETHTOWN, PA 17022-0107
PO BOX 108, ELIZABETHTOWN, PA 17022-0108
PO BOX 109, ELIZABETHTOWN, PA 17022-0109
PO BOX 110, ELIZABETHTOWN, PA 17022-0110
PO BOX 111, ELIZABETHTOWN, PA 17022-0111
PO BOX 112, ELIZABETHTOWN, PA 17022-0112
PO BOX 113, ELIZABETHTOWN, PA 17022-0113
PO BOX 114, ELIZABETHTOWN, PA 17022-0114
PO BOX 115, ELIZABETHTOWN, PA 17022-0115
PO BOX 116, ELIZABETHTOWN, PA 17022-0116
PO BOX 117, ELIZABETHTOWN, PA 17022-0117
PO BOX 118, ELIZABETHTOWN, PA 17022-0118
PO BOX 119, ELIZABETHTOWN, PA 17022-0119
PO BOX 120, ELIZABETHTOWN, PA 17022-0120
PO BOX 121, ELIZABETHTOWN, PA 17022-0121
PO BOX 122, ELIZABETHTOWN, PA 17022-0122
PO BOX 123, ELIZABETHTOWN, PA 17022-0123
PO BOX 124, ELIZABETHTOWN, PA 17022-0124
PO BOX 125, ELIZABETHTOWN, PA 17022-0125
PO BOX 126, ELIZABETHTOWN, PA 17022-0126
PO BOX 127, ELIZABETHTOWN, PA 17022-0127
PO BOX 128, ELIZABETHTOWN, PA 17022-0128
PO BOX 129, ELIZABETHTOWN, PA 17022-0129
PO BOX 130, ELIZABETHTOWN, PA 17022-0130
PO BOX 131, ELIZABETHTOWN, PA 17022-0131
PO BOX 132, ELIZABETHTOWN, PA 17022-0132
PO BOX 133, ELIZABETHTOWN, PA 17022-0133
PO BOX 134, ELIZABETHTOWN, PA 17022-0134
PO BOX 135, ELIZABETHTOWN, PA 17022-0135
PO BOX 136, ELIZABETHTOWN, PA 17022-0136
PO BOX 137, ELIZABETHTOWN, PA 17022-0137
PO BOX 138, ELIZABETHTOWN, PA 17022-0138
PO BOX 139, ELIZABETHTOWN, PA 17022-0139
PO BOX 140, ELIZABETHTOWN, PA 17022-0140
PO BOX 141, ELIZABETHTOWN, PA 17022-0141
PO BOX 142, ELIZABETHTOWN, PA 17022-0142
PO BOX 143, ELIZABETHTOWN, PA 17022-0143
PO BOX 144, ELIZABETHTOWN, PA 17022-0144
PO BOX 145, ELIZABETHTOWN, PA 17022-0145
PO BOX 146, ELIZABETHTOWN, PA 17022-0146
PO BOX 147, ELIZABETHTOWN, PA 17022-0147
PO BOX 148, ELIZABETHTOWN, PA 17022-0148
PO BOX 149, ELIZABETHTOWN, PA 17022-0149
PO BOX 150, ELIZABETHTOWN, PA 17022-0150
PO BOX 151, ELIZABETHTOWN, PA 17022-0151
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