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, YOUNG AMERICA, IN 46998-0001
PO BOX 2, YOUNG AMERICA, IN 46998-0002
PO BOX 3, YOUNG AMERICA, IN 46998-0003
PO BOX 4, YOUNG AMERICA, IN 46998-0004
PO BOX 5, YOUNG AMERICA, IN 46998-0005
PO BOX 6, YOUNG AMERICA, IN 46998-0006
PO BOX 7, YOUNG AMERICA, IN 46998-0007
PO BOX 8, YOUNG AMERICA, IN 46998-0008
PO BOX 9, YOUNG AMERICA, IN 46998-0009
PO BOX 10, YOUNG AMERICA, IN 46998-0010
PO BOX 11, YOUNG AMERICA, IN 46998-0011
PO BOX 12, YOUNG AMERICA, IN 46998-0012
PO BOX 13, YOUNG AMERICA, IN 46998-0013
PO BOX 14, YOUNG AMERICA, IN 46998-0014
PO BOX 15, YOUNG AMERICA, IN 46998-0015
PO BOX 16, YOUNG AMERICA, IN 46998-0016
PO BOX 17, YOUNG AMERICA, IN 46998-0017
PO BOX 18, YOUNG AMERICA, IN 46998-0018
PO BOX 19, YOUNG AMERICA, IN 46998-0019
PO BOX 20, YOUNG AMERICA, IN 46998-0020
PO BOX 21, YOUNG AMERICA, IN 46998-0021
PO BOX 22, YOUNG AMERICA, IN 46998-0022
PO BOX 23, YOUNG AMERICA, IN 46998-0023
PO BOX 24, YOUNG AMERICA, IN 46998-0024
PO BOX 25, YOUNG AMERICA, IN 46998-0025
PO BOX 26, YOUNG AMERICA, IN 46998-0026
PO BOX 27, YOUNG AMERICA, IN 46998-0027
PO BOX 28, YOUNG AMERICA, IN 46998-0028
PO BOX 29, YOUNG AMERICA, IN 46998-0029
PO BOX 30, YOUNG AMERICA, IN 46998-0030
PO BOX 31, YOUNG AMERICA, IN 46998-0031
PO BOX 32, YOUNG AMERICA, IN 46998-0032
PO BOX 33, YOUNG AMERICA, IN 46998-0033
PO BOX 34, YOUNG AMERICA, IN 46998-0034
PO BOX 35, YOUNG AMERICA, IN 46998-0035
PO BOX 36, YOUNG AMERICA, IN 46998-0036
PO BOX 37, YOUNG AMERICA, IN 46998-0037
PO BOX 38, YOUNG AMERICA, IN 46998-0038
PO BOX 39, YOUNG AMERICA, IN 46998-0039
PO BOX 40, YOUNG AMERICA, IN 46998-0040
PO BOX 41, YOUNG AMERICA, IN 46998-0041
PO BOX 42, YOUNG AMERICA, IN 46998-0042
PO BOX 43, YOUNG AMERICA, IN 46998-0043
PO BOX 44, YOUNG AMERICA, IN 46998-0044
PO BOX 45, YOUNG AMERICA, IN 46998-0045
PO BOX 46, YOUNG AMERICA, IN 46998-0046
PO BOX 47, YOUNG AMERICA, IN 46998-0047
PO BOX 48, YOUNG AMERICA, IN 46998-0048
PO BOX 49, YOUNG AMERICA, IN 46998-0049
PO BOX 50, YOUNG AMERICA, IN 46998-0050
PO BOX 51, YOUNG AMERICA, IN 46998-0051
PO BOX 52, YOUNG AMERICA, IN 46998-0052
PO BOX 53, YOUNG AMERICA, IN 46998-0053
PO BOX 54, YOUNG AMERICA, IN 46998-0054
PO BOX 55, YOUNG AMERICA, IN 46998-0055
PO BOX 56, YOUNG AMERICA, IN 46998-0056
PO BOX 57, YOUNG AMERICA, IN 46998-0057
PO BOX 58, YOUNG AMERICA, IN 46998-0058
PO BOX 59, YOUNG AMERICA, IN 46998-0059
PO BOX 60, YOUNG AMERICA, IN 46998-0060
PO BOX 61, YOUNG AMERICA, IN 46998-0061
PO BOX 62, YOUNG AMERICA, IN 46998-0062
PO BOX 63, YOUNG AMERICA, IN 46998-0063
PO BOX 64, YOUNG AMERICA, IN 46998-0064
PO BOX 65, YOUNG AMERICA, IN 46998-0065
PO BOX 66, YOUNG AMERICA, IN 46998-0066
PO BOX 67, YOUNG AMERICA, IN 46998-0067
PO BOX 68, YOUNG AMERICA, IN 46998-0068
PO BOX 69, YOUNG AMERICA, IN 46998-0069
PO BOX 70, YOUNG AMERICA, IN 46998-0070
PO BOX 71, YOUNG AMERICA, IN 46998-0071
PO BOX 72, YOUNG AMERICA, IN 46998-0072
PO BOX 73, YOUNG AMERICA, IN 46998-0073
PO BOX 74, YOUNG AMERICA, IN 46998-0074
PO BOX 75, YOUNG AMERICA, IN 46998-0075
PO BOX 76, YOUNG AMERICA, IN 46998-0076
PO BOX 77, YOUNG AMERICA, IN 46998-0077
PO BOX 78, YOUNG AMERICA, IN 46998-0078
PO BOX 79, YOUNG AMERICA, IN 46998-0079
PO BOX 80, YOUNG AMERICA, IN 46998-0080
PO BOX 81, YOUNG AMERICA, IN 46998-0081
PO BOX 82, YOUNG AMERICA, IN 46998-0082
PO BOX 83, YOUNG AMERICA, IN 46998-0083
PO BOX 84, YOUNG AMERICA, IN 46998-0084
PO BOX 85, YOUNG AMERICA, IN 46998-0085
PO BOX 86, YOUNG AMERICA, IN 46998-0086
PO BOX 87, YOUNG AMERICA, IN 46998-0087
PO BOX 88, YOUNG AMERICA, IN 46998-0088
PO BOX 89, YOUNG AMERICA, IN 46998-0089
PO BOX 90, YOUNG AMERICA, IN 46998-0090
PO BOX 91, YOUNG AMERICA, IN 46998-0091
PO BOX 92, YOUNG AMERICA, IN 46998-0092
PO BOX 93, YOUNG AMERICA, IN 46998-0093
PO BOX 94, YOUNG AMERICA, IN 46998-0094
PO BOX 95, YOUNG AMERICA, IN 46998-0095
PO BOX 96, YOUNG AMERICA, IN 46998-0096
PO BOX 97, YOUNG AMERICA, IN 46998-0097
PO BOX 98, YOUNG AMERICA, IN 46998-0098
PO BOX 99, YOUNG AMERICA, IN 46998-0099
PO BOX 100, YOUNG AMERICA, IN 46998-0100
PO BOX 101, YOUNG AMERICA, IN 46998-0101
PO BOX 102, YOUNG AMERICA, IN 46998-0102
PO BOX 103, YOUNG AMERICA, IN 46998-0103
PO BOX 104, YOUNG AMERICA, IN 46998-0104
PO BOX 105, YOUNG AMERICA, IN 46998-0105
PO BOX 106, YOUNG AMERICA, IN 46998-0106
PO BOX 107, YOUNG AMERICA, IN 46998-0107
PO BOX 108, YOUNG AMERICA, IN 46998-0108
PO BOX 109, YOUNG AMERICA, IN 46998-0109
PO BOX 110, YOUNG AMERICA, IN 46998-0110
PO BOX 111, YOUNG AMERICA, IN 46998-0111
PO BOX 112, YOUNG AMERICA, IN 46998-0112
PO BOX 113, YOUNG AMERICA, IN 46998-0113
PO BOX 114, YOUNG AMERICA, IN 46998-0114
PO BOX 115, YOUNG AMERICA, IN 46998-0115
PO BOX 116, YOUNG AMERICA, IN 46998-0116
PO BOX 117, YOUNG AMERICA, IN 46998-0117
PO BOX 118, YOUNG AMERICA, IN 46998-0118
PO BOX 119, YOUNG AMERICA, IN 46998-0119
PO BOX 120, YOUNG AMERICA, IN 46998-0120
PO BOX 121, YOUNG AMERICA, IN 46998-0121
PO BOX 122, YOUNG AMERICA, IN 46998-0122
PO BOX 123, YOUNG AMERICA, IN 46998-0123
PO BOX 124, YOUNG AMERICA, IN 46998-0124
PO BOX 125, YOUNG AMERICA, IN 46998-0125
PO BOX 126, YOUNG AMERICA, IN 46998-0126
PO BOX 127, YOUNG AMERICA, IN 46998-0127
PO BOX 128, YOUNG AMERICA, IN 46998-0128
PO BOX 129, YOUNG AMERICA, IN 46998-0129
PO BOX 130, YOUNG AMERICA, IN 46998-0130
PO BOX 131, YOUNG AMERICA, IN 46998-0131
PO BOX 132, YOUNG AMERICA, IN 46998-0132
PO BOX 133, YOUNG AMERICA, IN 46998-0133
PO BOX 134, YOUNG AMERICA, IN 46998-0134
PO BOX 135, YOUNG AMERICA, IN 46998-0135
PO BOX 136, YOUNG AMERICA, IN 46998-0136
PO BOX 137, YOUNG AMERICA, IN 46998-0137
PO BOX 138, YOUNG AMERICA, IN 46998-0138
PO BOX 139, YOUNG AMERICA, IN 46998-0139
PO BOX 140, YOUNG AMERICA, IN 46998-0140
PO BOX 141, YOUNG AMERICA, IN 46998-0141
PO BOX 142, YOUNG AMERICA, IN 46998-0142
PO BOX 143, YOUNG AMERICA, IN 46998-0143
PO BOX 144, YOUNG AMERICA, IN 46998-0144
PO BOX 145, YOUNG AMERICA, IN 46998-0145
PO BOX 146, YOUNG AMERICA, IN 46998-0146
PO BOX 147, YOUNG AMERICA, IN 46998-0147
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