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, CLARIDGE, PA 15623-0001
PO BOX 2, CLARIDGE, PA 15623-0002
PO BOX 3, CLARIDGE, PA 15623-0003
PO BOX 4, CLARIDGE, PA 15623-0004
PO BOX 5, CLARIDGE, PA 15623-0005
PO BOX 6, CLARIDGE, PA 15623-0006
PO BOX 7, CLARIDGE, PA 15623-0007
PO BOX 8, CLARIDGE, PA 15623-0008
PO BOX 9, CLARIDGE, PA 15623-0009
PO BOX 10, CLARIDGE, PA 15623-0010
PO BOX 11, CLARIDGE, PA 15623-0011
PO BOX 12, CLARIDGE, PA 15623-0012
PO BOX 13, CLARIDGE, PA 15623-0013
PO BOX 14, CLARIDGE, PA 15623-0014
PO BOX 15, CLARIDGE, PA 15623-0015
PO BOX 16, CLARIDGE, PA 15623-0016
PO BOX 17, CLARIDGE, PA 15623-0017
PO BOX 18, CLARIDGE, PA 15623-0018
PO BOX 19, CLARIDGE, PA 15623-0019
PO BOX 20, CLARIDGE, PA 15623-0020
PO BOX 21, CLARIDGE, PA 15623-0021
PO BOX 22, CLARIDGE, PA 15623-0022
PO BOX 23, CLARIDGE, PA 15623-0023
PO BOX 24, CLARIDGE, PA 15623-0024
PO BOX 25, CLARIDGE, PA 15623-0025
PO BOX 26, CLARIDGE, PA 15623-0026
PO BOX 27, CLARIDGE, PA 15623-0027
PO BOX 28, CLARIDGE, PA 15623-0028
PO BOX 29, CLARIDGE, PA 15623-0029
PO BOX 30, CLARIDGE, PA 15623-0030
PO BOX 31, CLARIDGE, PA 15623-0031
PO BOX 32, CLARIDGE, PA 15623-0032
PO BOX 33, CLARIDGE, PA 15623-0033
PO BOX 34, CLARIDGE, PA 15623-0034
PO BOX 35, CLARIDGE, PA 15623-0035
PO BOX 36, CLARIDGE, PA 15623-0036
PO BOX 37, CLARIDGE, PA 15623-0037
PO BOX 38, CLARIDGE, PA 15623-0038
PO BOX 39, CLARIDGE, PA 15623-0039
PO BOX 40, CLARIDGE, PA 15623-0040
PO BOX 41, CLARIDGE, PA 15623-0041
PO BOX 42, CLARIDGE, PA 15623-0042
PO BOX 43, CLARIDGE, PA 15623-0043
PO BOX 44, CLARIDGE, PA 15623-0044
PO BOX 45, CLARIDGE, PA 15623-0045
PO BOX 46, CLARIDGE, PA 15623-0046
PO BOX 47, CLARIDGE, PA 15623-0047
PO BOX 48, CLARIDGE, PA 15623-0048
PO BOX 49, CLARIDGE, PA 15623-0049
PO BOX 50, CLARIDGE, PA 15623-0050
PO BOX 51, CLARIDGE, PA 15623-0051
PO BOX 52, CLARIDGE, PA 15623-0052
PO BOX 53, CLARIDGE, PA 15623-0053
PO BOX 54, CLARIDGE, PA 15623-0054
PO BOX 55, CLARIDGE, PA 15623-0055
PO BOX 56, CLARIDGE, PA 15623-0056
PO BOX 57, CLARIDGE, PA 15623-0057
PO BOX 58, CLARIDGE, PA 15623-0058
PO BOX 59, CLARIDGE, PA 15623-0059
PO BOX 60, CLARIDGE, PA 15623-0060
PO BOX 61, CLARIDGE, PA 15623-0061
PO BOX 62, CLARIDGE, PA 15623-0062
PO BOX 63, CLARIDGE, PA 15623-0063
PO BOX 64, CLARIDGE, PA 15623-0064
PO BOX 65, CLARIDGE, PA 15623-0065
PO BOX 66, CLARIDGE, PA 15623-0066
PO BOX 67, CLARIDGE, PA 15623-0067
PO BOX 68, CLARIDGE, PA 15623-0068
PO BOX 69, CLARIDGE, PA 15623-0069
PO BOX 70, CLARIDGE, PA 15623-0070
PO BOX 71, CLARIDGE, PA 15623-0071
PO BOX 72, CLARIDGE, PA 15623-0072
PO BOX 73, CLARIDGE, PA 15623-0073
PO BOX 74, CLARIDGE, PA 15623-0074
PO BOX 75, CLARIDGE, PA 15623-0075
PO BOX 76, CLARIDGE, PA 15623-0076
PO BOX 77, CLARIDGE, PA 15623-0077
PO BOX 78, CLARIDGE, PA 15623-0078
PO BOX 79, CLARIDGE, PA 15623-0079
PO BOX 80, CLARIDGE, PA 15623-0080
PO BOX 81, CLARIDGE, PA 15623-0081
PO BOX 82, CLARIDGE, PA 15623-0082
PO BOX 83, CLARIDGE, PA 15623-0083
PO BOX 84, CLARIDGE, PA 15623-0084
PO BOX 85, CLARIDGE, PA 15623-0085
PO BOX 86, CLARIDGE, PA 15623-0086
PO BOX 87, CLARIDGE, PA 15623-0087
PO BOX 88, CLARIDGE, PA 15623-0088
PO BOX 89, CLARIDGE, PA 15623-0089
PO BOX 90, CLARIDGE, PA 15623-0090
PO BOX 91, CLARIDGE, PA 15623-0091
PO BOX 92, CLARIDGE, PA 15623-0092
PO BOX 93, CLARIDGE, PA 15623-0093
PO BOX 94, CLARIDGE, PA 15623-0094
PO BOX 95, CLARIDGE, PA 15623-0095
PO BOX 96, CLARIDGE, PA 15623-0096
PO BOX 97, CLARIDGE, PA 15623-0097
PO BOX 98, CLARIDGE, PA 15623-0098
PO BOX 99, CLARIDGE, PA 15623-0099
PO BOX 100, CLARIDGE, PA 15623-0100
PO BOX 101, CLARIDGE, PA 15623-0101
PO BOX 102, CLARIDGE, PA 15623-0102
PO BOX 103, CLARIDGE, PA 15623-0103
PO BOX 104, CLARIDGE, PA 15623-0104
PO BOX 105, CLARIDGE, PA 15623-0105
PO BOX 106, CLARIDGE, PA 15623-0106
PO BOX 107, CLARIDGE, PA 15623-0107
PO BOX 108, CLARIDGE, PA 15623-0108
PO BOX 109, CLARIDGE, PA 15623-0109
PO BOX 110, CLARIDGE, PA 15623-0110
PO BOX 111, CLARIDGE, PA 15623-0111
PO BOX 112, CLARIDGE, PA 15623-0112
PO BOX 113, CLARIDGE, PA 15623-0113
PO BOX 114, CLARIDGE, PA 15623-0114
PO BOX 115, CLARIDGE, PA 15623-0115
PO BOX 116, CLARIDGE, PA 15623-0116
PO BOX 117, CLARIDGE, PA 15623-0117
PO BOX 118, CLARIDGE, PA 15623-0118
PO BOX 119, CLARIDGE, PA 15623-0119
PO BOX 120, CLARIDGE, PA 15623-0120
PO BOX 121, CLARIDGE, PA 15623-0121
PO BOX 122, CLARIDGE, PA 15623-0122
PO BOX 123, CLARIDGE, PA 15623-0123
PO BOX 124, CLARIDGE, PA 15623-0124
PO BOX 125, CLARIDGE, PA 15623-0125
PO BOX 126, CLARIDGE, PA 15623-0126
PO BOX 127, CLARIDGE, PA 15623-0127
PO BOX 128, CLARIDGE, PA 15623-0128
PO BOX 129, CLARIDGE, PA 15623-0129
PO BOX 130, CLARIDGE, PA 15623-0130
PO BOX 131, CLARIDGE, PA 15623-0131
PO BOX 132, CLARIDGE, PA 15623-0132
PO BOX 133, CLARIDGE, PA 15623-0133
PO BOX 134, CLARIDGE, PA 15623-0134
PO BOX 135, CLARIDGE, PA 15623-0135
PO BOX 136, CLARIDGE, PA 15623-0136
PO BOX 137, CLARIDGE, PA 15623-0137
PO BOX 138, CLARIDGE, PA 15623-0138
PO BOX 139, CLARIDGE, PA 15623-0139
PO BOX 140, CLARIDGE, PA 15623-0140
PO BOX 141, CLARIDGE, PA 15623-0141
PO BOX 142, CLARIDGE, PA 15623-0142
PO BOX 143, CLARIDGE, PA 15623-0143
PO BOX 144, CLARIDGE, PA 15623-0144
PO BOX 145, CLARIDGE, PA 15623-0145
PO BOX 146, CLARIDGE, PA 15623-0146
PO BOX 147, CLARIDGE, PA 15623-0147
PO BOX 148, CLARIDGE, PA 15623-0148
PO BOX 149, CLARIDGE, PA 15623-0149
PO BOX 150, CLARIDGE, PA 15623-0150
PO BOX 151, CLARIDGE, PA 15623-0151
PO BOX 152, CLARIDGE, PA 15623-0152
PO BOX 153, CLARIDGE, PA 15623-0153
PO BOX 154, CLARIDGE, PA 15623-0154
PO BOX 155, CLARIDGE, PA 15623-0155
PO BOX 156, CLARIDGE, PA 15623-0156
PO BOX 157, CLARIDGE, PA 15623-0157
PO BOX 158, CLARIDGE, PA 15623-0158
PO BOX 159, CLARIDGE, PA 15623-0159
PO BOX 160, CLARIDGE, PA 15623-0160
PO BOX 161, CLARIDGE, PA 15623-0161
PO BOX 162, CLARIDGE, PA 15623-0162
PO BOX 163, CLARIDGE, PA 15623-0163
PO BOX 164, CLARIDGE, PA 15623-0164
PO BOX 165, CLARIDGE, PA 15623-0165
PO BOX 166, CLARIDGE, PA 15623-0166
PO BOX 167, CLARIDGE, PA 15623-0167
PO BOX 168, CLARIDGE, PA 15623-0168
PO BOX 169, CLARIDGE, PA 15623-0169
PO BOX 170, CLARIDGE, PA 15623-0170
PO BOX 171, CLARIDGE, PA 15623-0171
PO BOX 172, CLARIDGE, PA 15623-0172
PO BOX 173, CLARIDGE, PA 15623-0173
PO BOX 174, CLARIDGE, PA 15623-0174
PO BOX 175, CLARIDGE, PA 15623-0175
PO BOX 176, CLARIDGE, PA 15623-0176
PO BOX 177, CLARIDGE, PA 15623-0177
PO BOX 178, CLARIDGE, PA 15623-0178
PO BOX 179, CLARIDGE, PA 15623-0179
PO BOX 180, CLARIDGE, PA 15623-0180
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