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, NEW CUMBERLAND, PA 17070-0001
PO BOX 2, NEW CUMBERLAND, PA 17070-0002
PO BOX 3, NEW CUMBERLAND, PA 17070-0003
PO BOX 4, NEW CUMBERLAND, PA 17070-0004
PO BOX 5, NEW CUMBERLAND, PA 17070-0005
PO BOX 6, NEW CUMBERLAND, PA 17070-0006
PO BOX 7, NEW CUMBERLAND, PA 17070-0007
PO BOX 8, NEW CUMBERLAND, PA 17070-0008
PO BOX 9, NEW CUMBERLAND, PA 17070-0009
PO BOX 10, NEW CUMBERLAND, PA 17070-0010
PO BOX 11, NEW CUMBERLAND, PA 17070-0011
PO BOX 12, NEW CUMBERLAND, PA 17070-0012
PO BOX 13, NEW CUMBERLAND, PA 17070-0013
PO BOX 14, NEW CUMBERLAND, PA 17070-0014
PO BOX 15, NEW CUMBERLAND, PA 17070-0015
PO BOX 16, NEW CUMBERLAND, PA 17070-0016
PO BOX 17, NEW CUMBERLAND, PA 17070-0017
PO BOX 18, NEW CUMBERLAND, PA 17070-0018
PO BOX 19, NEW CUMBERLAND, PA 17070-0019
PO BOX 20, NEW CUMBERLAND, PA 17070-0020
PO BOX 21, NEW CUMBERLAND, PA 17070-0021
PO BOX 22, NEW CUMBERLAND, PA 17070-0022
PO BOX 23, NEW CUMBERLAND, PA 17070-0023
PO BOX 24, NEW CUMBERLAND, PA 17070-0024
PO BOX 25, NEW CUMBERLAND, PA 17070-0025
PO BOX 26, NEW CUMBERLAND, PA 17070-0026
PO BOX 27, NEW CUMBERLAND, PA 17070-0027
PO BOX 28, NEW CUMBERLAND, PA 17070-0028
PO BOX 29, NEW CUMBERLAND, PA 17070-0029
PO BOX 30, NEW CUMBERLAND, PA 17070-0030
PO BOX 31, NEW CUMBERLAND, PA 17070-0031
PO BOX 32, NEW CUMBERLAND, PA 17070-0032
PO BOX 33, NEW CUMBERLAND, PA 17070-0033
PO BOX 34, NEW CUMBERLAND, PA 17070-0034
PO BOX 35, NEW CUMBERLAND, PA 17070-0035
PO BOX 36, NEW CUMBERLAND, PA 17070-0036
PO BOX 37, NEW CUMBERLAND, PA 17070-0037
PO BOX 38, NEW CUMBERLAND, PA 17070-0038
PO BOX 39, NEW CUMBERLAND, PA 17070-0039
PO BOX 40, NEW CUMBERLAND, PA 17070-0040
PO BOX 41, NEW CUMBERLAND, PA 17070-0041
PO BOX 42, NEW CUMBERLAND, PA 17070-0042
PO BOX 43, NEW CUMBERLAND, PA 17070-0043
PO BOX 44, NEW CUMBERLAND, PA 17070-0044
PO BOX 45, NEW CUMBERLAND, PA 17070-0045
PO BOX 46, NEW CUMBERLAND, PA 17070-0046
PO BOX 47, NEW CUMBERLAND, PA 17070-0047
PO BOX 48, NEW CUMBERLAND, PA 17070-0048
PO BOX 49, NEW CUMBERLAND, PA 17070-0049
PO BOX 50, NEW CUMBERLAND, PA 17070-0050
PO BOX 51, NEW CUMBERLAND, PA 17070-0051
PO BOX 52, NEW CUMBERLAND, PA 17070-0052
PO BOX 53, NEW CUMBERLAND, PA 17070-0053
PO BOX 54, NEW CUMBERLAND, PA 17070-0054
PO BOX 55, NEW CUMBERLAND, PA 17070-0055
PO BOX 56, NEW CUMBERLAND, PA 17070-0056
PO BOX 57, NEW CUMBERLAND, PA 17070-0057
PO BOX 58, NEW CUMBERLAND, PA 17070-0058
PO BOX 59, NEW CUMBERLAND, PA 17070-0059
PO BOX 60, NEW CUMBERLAND, PA 17070-0060
PO BOX 61, NEW CUMBERLAND, PA 17070-0061
PO BOX 62, NEW CUMBERLAND, PA 17070-0062
PO BOX 63, NEW CUMBERLAND, PA 17070-0063
PO BOX 64, NEW CUMBERLAND, PA 17070-0064
PO BOX 65, NEW CUMBERLAND, PA 17070-0065
PO BOX 66, NEW CUMBERLAND, PA 17070-0066
PO BOX 67, NEW CUMBERLAND, PA 17070-0067
PO BOX 68, NEW CUMBERLAND, PA 17070-0068
PO BOX 69, NEW CUMBERLAND, PA 17070-0069
PO BOX 70, NEW CUMBERLAND, PA 17070-0070
PO BOX 71, NEW CUMBERLAND, PA 17070-0071
PO BOX 72, NEW CUMBERLAND, PA 17070-0072
PO BOX 73, NEW CUMBERLAND, PA 17070-0073
PO BOX 74, NEW CUMBERLAND, PA 17070-0074
PO BOX 75, NEW CUMBERLAND, PA 17070-0075
PO BOX 76, NEW CUMBERLAND, PA 17070-0076
PO BOX 77, NEW CUMBERLAND, PA 17070-0077
PO BOX 78, NEW CUMBERLAND, PA 17070-0078
PO BOX 79, NEW CUMBERLAND, PA 17070-0079
PO BOX 80, NEW CUMBERLAND, PA 17070-0080
PO BOX 81, NEW CUMBERLAND, PA 17070-0081
PO BOX 82, NEW CUMBERLAND, PA 17070-0082
PO BOX 83, NEW CUMBERLAND, PA 17070-0083
PO BOX 84, NEW CUMBERLAND, PA 17070-0084
PO BOX 85, NEW CUMBERLAND, PA 17070-0085
PO BOX 86, NEW CUMBERLAND, PA 17070-0086
PO BOX 87, NEW CUMBERLAND, PA 17070-0087
PO BOX 88, NEW CUMBERLAND, PA 17070-0088
PO BOX 89, NEW CUMBERLAND, PA 17070-0089
PO BOX 90, NEW CUMBERLAND, PA 17070-0090
PO BOX 91, NEW CUMBERLAND, PA 17070-0091
PO BOX 92, NEW CUMBERLAND, PA 17070-0092
PO BOX 93, NEW CUMBERLAND, PA 17070-0093
PO BOX 94, NEW CUMBERLAND, PA 17070-0094
PO BOX 95, NEW CUMBERLAND, PA 17070-0095
PO BOX 96, NEW CUMBERLAND, PA 17070-0096
PO BOX 97, NEW CUMBERLAND, PA 17070-0097
PO BOX 98, NEW CUMBERLAND, PA 17070-0098
PO BOX 99, NEW CUMBERLAND, PA 17070-0099
PO BOX 100, NEW CUMBERLAND, PA 17070-0100
PO BOX 101, NEW CUMBERLAND, PA 17070-0101
PO BOX 102, NEW CUMBERLAND, PA 17070-0102
PO BOX 103, NEW CUMBERLAND, PA 17070-0103
PO BOX 104, NEW CUMBERLAND, PA 17070-0104
PO BOX 105, NEW CUMBERLAND, PA 17070-0105
PO BOX 106, NEW CUMBERLAND, PA 17070-0106
PO BOX 107, NEW CUMBERLAND, PA 17070-0107
PO BOX 108, NEW CUMBERLAND, PA 17070-0108
PO BOX 109, NEW CUMBERLAND, PA 17070-0109
PO BOX 110, NEW CUMBERLAND, PA 17070-0110
PO BOX 111, NEW CUMBERLAND, PA 17070-0111
PO BOX 112, NEW CUMBERLAND, PA 17070-0112
PO BOX 113, NEW CUMBERLAND, PA 17070-0113
PO BOX 114, NEW CUMBERLAND, PA 17070-0114
PO BOX 115, NEW CUMBERLAND, PA 17070-0115
PO BOX 116, NEW CUMBERLAND, PA 17070-0116
PO BOX 117, NEW CUMBERLAND, PA 17070-0117
PO BOX 118, NEW CUMBERLAND, PA 17070-0118
PO BOX 119, NEW CUMBERLAND, PA 17070-0119
PO BOX 120, NEW CUMBERLAND, PA 17070-0120
PO BOX 121, NEW CUMBERLAND, PA 17070-0121
PO BOX 122, NEW CUMBERLAND, PA 17070-0122
PO BOX 123, NEW CUMBERLAND, PA 17070-0123
PO BOX 124, NEW CUMBERLAND, PA 17070-0124
PO BOX 125, NEW CUMBERLAND, PA 17070-0125
PO BOX 126, NEW CUMBERLAND, PA 17070-0126
PO BOX 127, NEW CUMBERLAND, PA 17070-0127
PO BOX 128, NEW CUMBERLAND, PA 17070-0128
PO BOX 129, NEW CUMBERLAND, PA 17070-0129
PO BOX 130, NEW CUMBERLAND, PA 17070-0130
PO BOX 131, NEW CUMBERLAND, PA 17070-0131
PO BOX 132, NEW CUMBERLAND, PA 17070-0132
PO BOX 133, NEW CUMBERLAND, PA 17070-0133
PO BOX 134, NEW CUMBERLAND, PA 17070-0134
PO BOX 135, NEW CUMBERLAND, PA 17070-0135
PO BOX 136, NEW CUMBERLAND, PA 17070-0136
PO BOX 137, NEW CUMBERLAND, PA 17070-0137
PO BOX 138, NEW CUMBERLAND, PA 17070-0138
PO BOX 139, NEW CUMBERLAND, PA 17070-0139
PO BOX 140, NEW CUMBERLAND, PA 17070-0140
PO BOX 141, NEW CUMBERLAND, PA 17070-0141
PO BOX 142, NEW CUMBERLAND, PA 17070-0142
PO BOX 143, NEW CUMBERLAND, PA 17070-0143
PO BOX 144, NEW CUMBERLAND, PA 17070-0144
PO BOX 145, NEW CUMBERLAND, PA 17070-0145
PO BOX 146, NEW CUMBERLAND, PA 17070-0146
PO BOX 147, NEW CUMBERLAND, PA 17070-0147
PO BOX 148, NEW CUMBERLAND, PA 17070-0148
PO BOX 149, NEW CUMBERLAND, PA 17070-0149
PO BOX 150, NEW CUMBERLAND, PA 17070-0150
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