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, SOUTH PARK, PA 15129-0001
PO BOX 2, SOUTH PARK, PA 15129-0002
PO BOX 3, SOUTH PARK, PA 15129-0003
PO BOX 4, SOUTH PARK, PA 15129-0004
PO BOX 5, SOUTH PARK, PA 15129-0005
PO BOX 6, SOUTH PARK, PA 15129-0006
PO BOX 7, SOUTH PARK, PA 15129-0007
PO BOX 8, SOUTH PARK, PA 15129-0008
PO BOX 9, SOUTH PARK, PA 15129-0009
PO BOX 10, SOUTH PARK, PA 15129-0010
PO BOX 11, SOUTH PARK, PA 15129-0011
PO BOX 12, SOUTH PARK, PA 15129-0012
PO BOX 13, SOUTH PARK, PA 15129-0013
PO BOX 14, SOUTH PARK, PA 15129-0014
PO BOX 15, SOUTH PARK, PA 15129-0015
PO BOX 16, SOUTH PARK, PA 15129-0016
PO BOX 17, SOUTH PARK, PA 15129-0017
PO BOX 18, SOUTH PARK, PA 15129-0018
PO BOX 19, SOUTH PARK, PA 15129-0019
PO BOX 20, SOUTH PARK, PA 15129-0020
PO BOX 21, SOUTH PARK, PA 15129-0021
PO BOX 22, SOUTH PARK, PA 15129-0022
PO BOX 23, SOUTH PARK, PA 15129-0023
PO BOX 24, SOUTH PARK, PA 15129-0024
PO BOX 25, SOUTH PARK, PA 15129-0025
PO BOX 26, SOUTH PARK, PA 15129-0026
PO BOX 27, SOUTH PARK, PA 15129-0027
PO BOX 28, SOUTH PARK, PA 15129-0028
PO BOX 29, SOUTH PARK, PA 15129-0029
PO BOX 30, SOUTH PARK, PA 15129-0030
PO BOX 31, SOUTH PARK, PA 15129-0031
PO BOX 32, SOUTH PARK, PA 15129-0032
PO BOX 33, SOUTH PARK, PA 15129-0033
PO BOX 34, SOUTH PARK, PA 15129-0034
PO BOX 35, SOUTH PARK, PA 15129-0035
PO BOX 36, SOUTH PARK, PA 15129-0036
PO BOX 37, SOUTH PARK, PA 15129-0037
PO BOX 38, SOUTH PARK, PA 15129-0038
PO BOX 39, SOUTH PARK, PA 15129-0039
PO BOX 40, SOUTH PARK, PA 15129-0040
PO BOX 41, SOUTH PARK, PA 15129-0041
PO BOX 42, SOUTH PARK, PA 15129-0042
PO BOX 43, SOUTH PARK, PA 15129-0043
PO BOX 44, SOUTH PARK, PA 15129-0044
PO BOX 45, SOUTH PARK, PA 15129-0045
PO BOX 46, SOUTH PARK, PA 15129-0046
PO BOX 47, SOUTH PARK, PA 15129-0047
PO BOX 48, SOUTH PARK, PA 15129-0048
PO BOX 49, SOUTH PARK, PA 15129-0049
PO BOX 50, SOUTH PARK, PA 15129-0050
PO BOX 51, SOUTH PARK, PA 15129-0051
PO BOX 52, SOUTH PARK, PA 15129-0052
PO BOX 53, SOUTH PARK, PA 15129-0053
PO BOX 54, SOUTH PARK, PA 15129-0054
PO BOX 55, SOUTH PARK, PA 15129-0055
PO BOX 56, SOUTH PARK, PA 15129-0056
PO BOX 57, SOUTH PARK, PA 15129-0057
PO BOX 58, SOUTH PARK, PA 15129-0058
PO BOX 59, SOUTH PARK, PA 15129-0059
PO BOX 60, SOUTH PARK, PA 15129-0060
PO BOX 61, SOUTH PARK, PA 15129-0061
PO BOX 62, SOUTH PARK, PA 15129-0062
PO BOX 63, SOUTH PARK, PA 15129-0063
PO BOX 64, SOUTH PARK, PA 15129-0064
PO BOX 65, SOUTH PARK, PA 15129-0065
PO BOX 66, SOUTH PARK, PA 15129-0066
PO BOX 67, SOUTH PARK, PA 15129-0067
PO BOX 68, SOUTH PARK, PA 15129-0068
PO BOX 69, SOUTH PARK, PA 15129-0069
PO BOX 70, SOUTH PARK, PA 15129-0070
PO BOX 71, SOUTH PARK, PA 15129-0071
PO BOX 72, SOUTH PARK, PA 15129-0072
PO BOX 73, SOUTH PARK, PA 15129-0073
PO BOX 74, SOUTH PARK, PA 15129-0074
PO BOX 75, SOUTH PARK, PA 15129-0075
PO BOX 76, SOUTH PARK, PA 15129-0076
PO BOX 77, SOUTH PARK, PA 15129-0077
PO BOX 78, SOUTH PARK, PA 15129-0078
PO BOX 79, SOUTH PARK, PA 15129-0079
PO BOX 80, SOUTH PARK, PA 15129-0080
PO BOX 81, SOUTH PARK, PA 15129-0081
PO BOX 82, SOUTH PARK, PA 15129-0082
PO BOX 83, SOUTH PARK, PA 15129-0083
PO BOX 84, SOUTH PARK, PA 15129-0084
PO BOX 85, SOUTH PARK, PA 15129-0085
PO BOX 86, SOUTH PARK, PA 15129-0086
PO BOX 87, SOUTH PARK, PA 15129-0087
PO BOX 88, SOUTH PARK, PA 15129-0088
PO BOX 89, SOUTH PARK, PA 15129-0089
PO BOX 90, SOUTH PARK, PA 15129-0090
PO BOX 91, SOUTH PARK, PA 15129-0091
PO BOX 92, SOUTH PARK, PA 15129-0092
PO BOX 93, SOUTH PARK, PA 15129-0093
PO BOX 94, SOUTH PARK, PA 15129-0094
PO BOX 95, SOUTH PARK, PA 15129-0095
PO BOX 96, SOUTH PARK, PA 15129-0096
PO BOX 97, SOUTH PARK, PA 15129-0097
PO BOX 98, SOUTH PARK, PA 15129-0098
PO BOX 99, SOUTH PARK, PA 15129-0099
PO BOX 100, SOUTH PARK, PA 15129-0100
PO BOX 101, SOUTH PARK, PA 15129-0101
PO BOX 102, SOUTH PARK, PA 15129-0102
PO BOX 103, SOUTH PARK, PA 15129-0103
PO BOX 104, SOUTH PARK, PA 15129-0104
PO BOX 105, SOUTH PARK, PA 15129-0105
PO BOX 106, SOUTH PARK, PA 15129-0106
PO BOX 107, SOUTH PARK, PA 15129-0107
PO BOX 108, SOUTH PARK, PA 15129-0108
PO BOX 109, SOUTH PARK, PA 15129-0109
PO BOX 110, SOUTH PARK, PA 15129-0110
PO BOX 111, SOUTH PARK, PA 15129-0111
PO BOX 112, SOUTH PARK, PA 15129-0112
PO BOX 113, SOUTH PARK, PA 15129-0113
PO BOX 114, SOUTH PARK, PA 15129-0114
PO BOX 115, SOUTH PARK, PA 15129-0115
PO BOX 116, SOUTH PARK, PA 15129-0116
PO BOX 117, SOUTH PARK, PA 15129-0117
PO BOX 118, SOUTH PARK, PA 15129-0118
PO BOX 119, SOUTH PARK, PA 15129-0119
PO BOX 120, SOUTH PARK, PA 15129-0120
PO BOX 121, SOUTH PARK, PA 15129-0121
PO BOX 122, SOUTH PARK, PA 15129-0122
PO BOX 123, SOUTH PARK, PA 15129-0123
PO BOX 124, SOUTH PARK, PA 15129-0124
PO BOX 125, SOUTH PARK, PA 15129-0125
PO BOX 126, SOUTH PARK, PA 15129-0126
PO BOX 127, SOUTH PARK, PA 15129-0127
PO BOX 128, SOUTH PARK, PA 15129-0128
PO BOX 129, SOUTH PARK, PA 15129-0129
PO BOX 130, SOUTH PARK, PA 15129-0130
PO BOX 131, SOUTH PARK, PA 15129-0131
PO BOX 132, SOUTH PARK, PA 15129-0132
PO BOX 133, SOUTH PARK, PA 15129-0133
PO BOX 134, SOUTH PARK, PA 15129-0134
PO BOX 135, SOUTH PARK, PA 15129-0135
PO BOX 136, SOUTH PARK, PA 15129-0136
PO BOX 137, SOUTH PARK, PA 15129-0137
PO BOX 138, SOUTH PARK, PA 15129-0138
PO BOX 139, SOUTH PARK, PA 15129-0139
PO BOX 140, SOUTH PARK, PA 15129-0140
PO BOX 141, SOUTH PARK, PA 15129-0141
PO BOX 142, SOUTH PARK, PA 15129-0142
PO BOX 143, SOUTH PARK, PA 15129-0143
PO BOX 144, SOUTH PARK, PA 15129-0144
PO BOX 145, SOUTH PARK, PA 15129-0145
PO BOX 146, SOUTH PARK, PA 15129-0146
PO BOX 147, SOUTH PARK, PA 15129-0147
PO BOX 148, SOUTH PARK, PA 15129-0148
PO BOX 149, SOUTH PARK, PA 15129-0149
PO BOX 150, SOUTH PARK, PA 15129-0150
PO BOX 151, SOUTH PARK, PA 15129-0151
PO BOX 152, SOUTH PARK, PA 15129-0152
PO BOX 153, SOUTH PARK, PA 15129-0153
PO BOX 154, SOUTH PARK, PA 15129-0154
PO BOX 155, SOUTH PARK, PA 15129-0155
PO BOX 156, SOUTH PARK, PA 15129-0156
PO BOX 157, SOUTH PARK, PA 15129-0157
PO BOX 158, SOUTH PARK, PA 15129-0158
PO BOX 159, SOUTH PARK, PA 15129-0159
PO BOX 160, SOUTH PARK, PA 15129-0160
PO BOX 161, SOUTH PARK, PA 15129-0161
PO BOX 162, SOUTH PARK, PA 15129-0162
PO BOX 163, SOUTH PARK, PA 15129-0163
PO BOX 164, SOUTH PARK, PA 15129-0164
PO BOX 165, SOUTH PARK, PA 15129-0165
PO BOX 166, SOUTH PARK, PA 15129-0166
PO BOX 167, SOUTH PARK, PA 15129-0167
PO BOX 168, SOUTH PARK, PA 15129-0168
PO BOX 169, SOUTH PARK, PA 15129-0169
PO BOX 170, SOUTH PARK, PA 15129-0170
PO BOX 171, SOUTH PARK, PA 15129-0171
PO BOX 172, SOUTH PARK, PA 15129-0172
PO BOX 173, SOUTH PARK, PA 15129-0173
PO BOX 174, SOUTH PARK, PA 15129-0174
PO BOX 175, SOUTH PARK, PA 15129-0175
PO BOX 176, SOUTH PARK, PA 15129-0176
PO BOX 177, SOUTH PARK, PA 15129-0177
PO BOX 178, SOUTH PARK, PA 15129-0178
PO BOX 179, SOUTH PARK, PA 15129-0179
PO BOX 180, SOUTH PARK, PA 15129-0180
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