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, CASSANDRA, PA 15925-0001
PO BOX 2, CASSANDRA, PA 15925-0002
PO BOX 3, CASSANDRA, PA 15925-0003
PO BOX 4, CASSANDRA, PA 15925-0004
PO BOX 5, CASSANDRA, PA 15925-0005
PO BOX 6, CASSANDRA, PA 15925-0006
PO BOX 7, CASSANDRA, PA 15925-0007
PO BOX 8, CASSANDRA, PA 15925-0008
PO BOX 9, CASSANDRA, PA 15925-0009
PO BOX 10, CASSANDRA, PA 15925-0010
PO BOX 11, CASSANDRA, PA 15925-0011
PO BOX 12, CASSANDRA, PA 15925-0012
PO BOX 13, CASSANDRA, PA 15925-0013
PO BOX 14, CASSANDRA, PA 15925-0014
PO BOX 15, CASSANDRA, PA 15925-0015
PO BOX 16, CASSANDRA, PA 15925-0016
PO BOX 17, CASSANDRA, PA 15925-0017
PO BOX 18, CASSANDRA, PA 15925-0018
PO BOX 19, CASSANDRA, PA 15925-0019
PO BOX 20, CASSANDRA, PA 15925-0020
PO BOX 21, CASSANDRA, PA 15925-0021
PO BOX 22, CASSANDRA, PA 15925-0022
PO BOX 23, CASSANDRA, PA 15925-0023
PO BOX 24, CASSANDRA, PA 15925-0024
PO BOX 25, CASSANDRA, PA 15925-0025
PO BOX 26, CASSANDRA, PA 15925-0026
PO BOX 27, CASSANDRA, PA 15925-0027
PO BOX 28, CASSANDRA, PA 15925-0028
PO BOX 29, CASSANDRA, PA 15925-0029
PO BOX 30, CASSANDRA, PA 15925-0030
PO BOX 31, CASSANDRA, PA 15925-0031
PO BOX 32, CASSANDRA, PA 15925-0032
PO BOX 33, CASSANDRA, PA 15925-0033
PO BOX 34, CASSANDRA, PA 15925-0034
PO BOX 35, CASSANDRA, PA 15925-0035
PO BOX 36, CASSANDRA, PA 15925-0036
PO BOX 37, CASSANDRA, PA 15925-0037
PO BOX 38, CASSANDRA, PA 15925-0038
PO BOX 39, CASSANDRA, PA 15925-0039
PO BOX 40, CASSANDRA, PA 15925-0040
PO BOX 41, CASSANDRA, PA 15925-0041
PO BOX 42, CASSANDRA, PA 15925-0042
PO BOX 43, CASSANDRA, PA 15925-0043
PO BOX 44, CASSANDRA, PA 15925-0044
PO BOX 45, CASSANDRA, PA 15925-0045
PO BOX 46, CASSANDRA, PA 15925-0046
PO BOX 47, CASSANDRA, PA 15925-0047
PO BOX 48, CASSANDRA, PA 15925-0048
PO BOX 49, CASSANDRA, PA 15925-0049
PO BOX 50, CASSANDRA, PA 15925-0050
PO BOX 51, CASSANDRA, PA 15925-0051
PO BOX 52, CASSANDRA, PA 15925-0052
PO BOX 53, CASSANDRA, PA 15925-0053
PO BOX 54, CASSANDRA, PA 15925-0054
PO BOX 55, CASSANDRA, PA 15925-0055
PO BOX 56, CASSANDRA, PA 15925-0056
PO BOX 57, CASSANDRA, PA 15925-0057
PO BOX 58, CASSANDRA, PA 15925-0058
PO BOX 59, CASSANDRA, PA 15925-0059
PO BOX 60, CASSANDRA, PA 15925-0060
PO BOX 61, CASSANDRA, PA 15925-0061
PO BOX 62, CASSANDRA, PA 15925-0062
PO BOX 63, CASSANDRA, PA 15925-0063
PO BOX 64, CASSANDRA, PA 15925-0064
PO BOX 65, CASSANDRA, PA 15925-0065
PO BOX 66, CASSANDRA, PA 15925-0066
PO BOX 67, CASSANDRA, PA 15925-0067
PO BOX 68, CASSANDRA, PA 15925-0068
PO BOX 69, CASSANDRA, PA 15925-0069
PO BOX 70, CASSANDRA, PA 15925-0070
PO BOX 71, CASSANDRA, PA 15925-0071
PO BOX 72, CASSANDRA, PA 15925-0072
PO BOX 73, CASSANDRA, PA 15925-0073
PO BOX 74, CASSANDRA, PA 15925-0074
PO BOX 75, CASSANDRA, PA 15925-0075
PO BOX 76, CASSANDRA, PA 15925-0076
PO BOX 77, CASSANDRA, PA 15925-0077
PO BOX 78, CASSANDRA, PA 15925-0078
PO BOX 79, CASSANDRA, PA 15925-0079
PO BOX 80, CASSANDRA, PA 15925-0080
PO BOX 81, CASSANDRA, PA 15925-0081
PO BOX 82, CASSANDRA, PA 15925-0082
PO BOX 83, CASSANDRA, PA 15925-0083
PO BOX 84, CASSANDRA, PA 15925-0084
PO BOX 85, CASSANDRA, PA 15925-0085
PO BOX 86, CASSANDRA, PA 15925-0086
PO BOX 87, CASSANDRA, PA 15925-0087
PO BOX 88, CASSANDRA, PA 15925-0088
PO BOX 89, CASSANDRA, PA 15925-0089
PO BOX 90, CASSANDRA, PA 15925-0090
PO BOX 91, CASSANDRA, PA 15925-0091
PO BOX 92, CASSANDRA, PA 15925-0092
PO BOX 93, CASSANDRA, PA 15925-0093
PO BOX 94, CASSANDRA, PA 15925-0094
PO BOX 95, CASSANDRA, PA 15925-0095
PO BOX 96, CASSANDRA, PA 15925-0096
PO BOX 97, CASSANDRA, PA 15925-0097
PO BOX 98, CASSANDRA, PA 15925-0098
PO BOX 99, CASSANDRA, PA 15925-0099
PO BOX 100, CASSANDRA, PA 15925-0100
PO BOX 101, CASSANDRA, PA 15925-0101
PO BOX 102, CASSANDRA, PA 15925-0102
PO BOX 103, CASSANDRA, PA 15925-0103
PO BOX 104, CASSANDRA, PA 15925-0104
PO BOX 105, CASSANDRA, PA 15925-0105
PO BOX 106, CASSANDRA, PA 15925-0106
PO BOX 107, CASSANDRA, PA 15925-0107
PO BOX 108, CASSANDRA, PA 15925-0108
PO BOX 109, CASSANDRA, PA 15925-0109
PO BOX 110, CASSANDRA, PA 15925-0110
PO BOX 111, CASSANDRA, PA 15925-0111
PO BOX 112, CASSANDRA, PA 15925-0112
PO BOX 113, CASSANDRA, PA 15925-0113
PO BOX 114, CASSANDRA, PA 15925-0114
PO BOX 115, CASSANDRA, PA 15925-0115
PO BOX 116, CASSANDRA, PA 15925-0116
PO BOX 117, CASSANDRA, PA 15925-0117
PO BOX 118, CASSANDRA, PA 15925-0118
PO BOX 119, CASSANDRA, PA 15925-0119
PO BOX 120, CASSANDRA, PA 15925-0120
PO BOX 121, CASSANDRA, PA 15925-0121
PO BOX 122, CASSANDRA, PA 15925-0122
PO BOX 123, CASSANDRA, PA 15925-0123
PO BOX 124, CASSANDRA, PA 15925-0124
PO BOX 125, CASSANDRA, PA 15925-0125
PO BOX 126, CASSANDRA, PA 15925-0126
PO BOX 127, CASSANDRA, PA 15925-0127
PO BOX 128, CASSANDRA, PA 15925-0128
PO BOX 129, CASSANDRA, PA 15925-0129
PO BOX 130, CASSANDRA, PA 15925-0130
PO BOX 131, CASSANDRA, PA 15925-0131
PO BOX 132, CASSANDRA, PA 15925-0132
PO BOX 133, CASSANDRA, PA 15925-0133
PO BOX 134, CASSANDRA, PA 15925-0134
PO BOX 135, CASSANDRA, PA 15925-0135
PO BOX 136, CASSANDRA, PA 15925-0136
PO BOX 137, CASSANDRA, PA 15925-0137
PO BOX 138, CASSANDRA, PA 15925-0138
PO BOX 139, CASSANDRA, PA 15925-0139
PO BOX 140, CASSANDRA, PA 15925-0140
PO BOX 141, CASSANDRA, PA 15925-0141
PO BOX 142, CASSANDRA, PA 15925-0142
PO BOX 143, CASSANDRA, PA 15925-0143
PO BOX 144, CASSANDRA, PA 15925-0144
PO BOX 145, CASSANDRA, PA 15925-0145
PO BOX 146, CASSANDRA, PA 15925-0146
PO BOX 147, CASSANDRA, PA 15925-0147
PO BOX 148, CASSANDRA, PA 15925-0148
PO BOX 149, CASSANDRA, PA 15925-0149
PO BOX 150, CASSANDRA, PA 15925-0150
PO BOX 151, CASSANDRA, PA 15925-0151
PO BOX 152, CASSANDRA, PA 15925-0152
PO BOX 153, CASSANDRA, PA 15925-0153
PO BOX 154, CASSANDRA, PA 15925-0154
PO BOX 155, CASSANDRA, PA 15925-0155
PO BOX 156, CASSANDRA, PA 15925-0156
PO BOX 157, CASSANDRA, PA 15925-0157
PO BOX 158, CASSANDRA, PA 15925-0158
PO BOX 159, CASSANDRA, PA 15925-0159
PO BOX 160, CASSANDRA, PA 15925-0160
PO BOX 161, CASSANDRA, PA 15925-0161
PO BOX 162, CASSANDRA, PA 15925-0162
PO BOX 163, CASSANDRA, PA 15925-0163
PO BOX 164, CASSANDRA, PA 15925-0164
PO BOX 165, CASSANDRA, PA 15925-0165
PO BOX 166, CASSANDRA, PA 15925-0166
PO BOX 167, CASSANDRA, PA 15925-0167
PO BOX 168, CASSANDRA, PA 15925-0168
PO BOX 169, CASSANDRA, PA 15925-0169
PO BOX 170, CASSANDRA, PA 15925-0170
PO BOX 171, CASSANDRA, PA 15925-0171
PO BOX 172, CASSANDRA, PA 15925-0172
PO BOX 173, CASSANDRA, PA 15925-0173
PO BOX 174, CASSANDRA, PA 15925-0174
PO BOX 175, CASSANDRA, PA 15925-0175
PO BOX 176, CASSANDRA, PA 15925-0176
PO BOX 177, CASSANDRA, PA 15925-0177
PO BOX 178, CASSANDRA, PA 15925-0178
PO BOX 179, CASSANDRA, PA 15925-0179
PO BOX 180, CASSANDRA, PA 15925-0180
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