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, HEAFFORD JUNCTION, WI 54532-0001
PO BOX 2, HEAFFORD JUNCTION, WI 54532-0002
PO BOX 3, HEAFFORD JUNCTION, WI 54532-0003
PO BOX 4, HEAFFORD JUNCTION, WI 54532-0004
PO BOX 5, HEAFFORD JUNCTION, WI 54532-0005
PO BOX 6, HEAFFORD JUNCTION, WI 54532-0006
PO BOX 7, HEAFFORD JUNCTION, WI 54532-0007
PO BOX 8, HEAFFORD JUNCTION, WI 54532-0008
PO BOX 9, HEAFFORD JUNCTION, WI 54532-0009
PO BOX 10, HEAFFORD JUNCTION, WI 54532-0010
PO BOX 11, HEAFFORD JUNCTION, WI 54532-0011
PO BOX 12, HEAFFORD JUNCTION, WI 54532-0012
PO BOX 13, HEAFFORD JUNCTION, WI 54532-0013
PO BOX 14, HEAFFORD JUNCTION, WI 54532-0014
PO BOX 15, HEAFFORD JUNCTION, WI 54532-0015
PO BOX 16, HEAFFORD JUNCTION, WI 54532-0016
PO BOX 17, HEAFFORD JUNCTION, WI 54532-0017
PO BOX 18, HEAFFORD JUNCTION, WI 54532-0018
PO BOX 19, HEAFFORD JUNCTION, WI 54532-0019
PO BOX 20, HEAFFORD JUNCTION, WI 54532-0020
PO BOX 21, HEAFFORD JUNCTION, WI 54532-0021
PO BOX 22, HEAFFORD JUNCTION, WI 54532-0022
PO BOX 23, HEAFFORD JUNCTION, WI 54532-0023
PO BOX 24, HEAFFORD JUNCTION, WI 54532-0024
PO BOX 25, HEAFFORD JUNCTION, WI 54532-0025
PO BOX 26, HEAFFORD JUNCTION, WI 54532-0026
PO BOX 27, HEAFFORD JUNCTION, WI 54532-0027
PO BOX 28, HEAFFORD JUNCTION, WI 54532-0028
PO BOX 29, HEAFFORD JUNCTION, WI 54532-0029
PO BOX 30, HEAFFORD JUNCTION, WI 54532-0030
PO BOX 31, HEAFFORD JUNCTION, WI 54532-0031
PO BOX 32, HEAFFORD JUNCTION, WI 54532-0032
PO BOX 33, HEAFFORD JUNCTION, WI 54532-0033
PO BOX 34, HEAFFORD JUNCTION, WI 54532-0034
PO BOX 35, HEAFFORD JUNCTION, WI 54532-0035
PO BOX 36, HEAFFORD JUNCTION, WI 54532-0036
PO BOX 37, HEAFFORD JUNCTION, WI 54532-0037
PO BOX 38, HEAFFORD JUNCTION, WI 54532-0038
PO BOX 39, HEAFFORD JUNCTION, WI 54532-0039
PO BOX 40, HEAFFORD JUNCTION, WI 54532-0040
PO BOX 41, HEAFFORD JUNCTION, WI 54532-0041
PO BOX 42, HEAFFORD JUNCTION, WI 54532-0042
PO BOX 43, HEAFFORD JUNCTION, WI 54532-0043
PO BOX 44, HEAFFORD JUNCTION, WI 54532-0044
PO BOX 45, HEAFFORD JUNCTION, WI 54532-0045
PO BOX 46, HEAFFORD JUNCTION, WI 54532-0046
PO BOX 47, HEAFFORD JUNCTION, WI 54532-0047
PO BOX 48, HEAFFORD JUNCTION, WI 54532-0048
PO BOX 49, HEAFFORD JUNCTION, WI 54532-0049
PO BOX 50, HEAFFORD JUNCTION, WI 54532-0050
PO BOX 51, HEAFFORD JUNCTION, WI 54532-0051
PO BOX 52, HEAFFORD JUNCTION, WI 54532-0052
PO BOX 53, HEAFFORD JUNCTION, WI 54532-0053
PO BOX 54, HEAFFORD JUNCTION, WI 54532-0054
PO BOX 55, HEAFFORD JUNCTION, WI 54532-0055
PO BOX 56, HEAFFORD JUNCTION, WI 54532-0056
PO BOX 57, HEAFFORD JUNCTION, WI 54532-0057
PO BOX 58, HEAFFORD JUNCTION, WI 54532-0058
PO BOX 59, HEAFFORD JUNCTION, WI 54532-0059
PO BOX 60, HEAFFORD JUNCTION, WI 54532-0060
PO BOX 61, HEAFFORD JUNCTION, WI 54532-0061
PO BOX 62, HEAFFORD JUNCTION, WI 54532-0062
PO BOX 63, HEAFFORD JUNCTION, WI 54532-0063
PO BOX 64, HEAFFORD JUNCTION, WI 54532-0064
PO BOX 65, HEAFFORD JUNCTION, WI 54532-0065
PO BOX 66, HEAFFORD JUNCTION, WI 54532-0066
PO BOX 67, HEAFFORD JUNCTION, WI 54532-0067
PO BOX 68, HEAFFORD JUNCTION, WI 54532-0068
PO BOX 69, HEAFFORD JUNCTION, WI 54532-0069
PO BOX 70, HEAFFORD JUNCTION, WI 54532-0070
PO BOX 71, HEAFFORD JUNCTION, WI 54532-0071
PO BOX 72, HEAFFORD JUNCTION, WI 54532-0072
PO BOX 73, HEAFFORD JUNCTION, WI 54532-0073
PO BOX 74, HEAFFORD JUNCTION, WI 54532-0074
PO BOX 75, HEAFFORD JUNCTION, WI 54532-0075
PO BOX 76, HEAFFORD JUNCTION, WI 54532-0076
PO BOX 77, HEAFFORD JUNCTION, WI 54532-0077
PO BOX 78, HEAFFORD JUNCTION, WI 54532-0078
PO BOX 79, HEAFFORD JUNCTION, WI 54532-0079
PO BOX 80, HEAFFORD JUNCTION, WI 54532-0080
PO BOX 81, HEAFFORD JUNCTION, WI 54532-0081
PO BOX 82, HEAFFORD JUNCTION, WI 54532-0082
PO BOX 83, HEAFFORD JUNCTION, WI 54532-0083
PO BOX 84, HEAFFORD JUNCTION, WI 54532-0084
PO BOX 85, HEAFFORD JUNCTION, WI 54532-0085
PO BOX 86, HEAFFORD JUNCTION, WI 54532-0086
PO BOX 87, HEAFFORD JUNCTION, WI 54532-0087
PO BOX 88, HEAFFORD JUNCTION, WI 54532-0088
PO BOX 89, HEAFFORD JUNCTION, WI 54532-0089
PO BOX 90, HEAFFORD JUNCTION, WI 54532-0090
PO BOX 91, HEAFFORD JUNCTION, WI 54532-0091
PO BOX 92, HEAFFORD JUNCTION, WI 54532-0092
PO BOX 93, HEAFFORD JUNCTION, WI 54532-0093
PO BOX 94, HEAFFORD JUNCTION, WI 54532-0094
PO BOX 95, HEAFFORD JUNCTION, WI 54532-0095
PO BOX 96, HEAFFORD JUNCTION, WI 54532-0096
PO BOX 97, HEAFFORD JUNCTION, WI 54532-0097
PO BOX 98, HEAFFORD JUNCTION, WI 54532-0098
PO BOX 99, HEAFFORD JUNCTION, WI 54532-0099
PO BOX 100, HEAFFORD JUNCTION, WI 54532-0100
PO BOX 101, HEAFFORD JUNCTION, WI 54532-0101
PO BOX 102, HEAFFORD JUNCTION, WI 54532-0102
PO BOX 103, HEAFFORD JUNCTION, WI 54532-0103
PO BOX 104, HEAFFORD JUNCTION, WI 54532-0104
PO BOX 105, HEAFFORD JUNCTION, WI 54532-0105
PO BOX 106, HEAFFORD JUNCTION, WI 54532-0106
PO BOX 107, HEAFFORD JUNCTION, WI 54532-0107
PO BOX 108, HEAFFORD JUNCTION, WI 54532-0108
PO BOX 109, HEAFFORD JUNCTION, WI 54532-0109
PO BOX 110, HEAFFORD JUNCTION, WI 54532-0110
PO BOX 111, HEAFFORD JUNCTION, WI 54532-0111
PO BOX 112, HEAFFORD JUNCTION, WI 54532-0112
PO BOX 113, HEAFFORD JUNCTION, WI 54532-0113
PO BOX 114, HEAFFORD JUNCTION, WI 54532-0114
PO BOX 115, HEAFFORD JUNCTION, WI 54532-0115
PO BOX 116, HEAFFORD JUNCTION, WI 54532-0116
PO BOX 117, HEAFFORD JUNCTION, WI 54532-0117
PO BOX 118, HEAFFORD JUNCTION, WI 54532-0118
PO BOX 119, HEAFFORD JUNCTION, WI 54532-0119
PO BOX 120, HEAFFORD JUNCTION, WI 54532-0120
PO BOX 121, HEAFFORD JUNCTION, WI 54532-0121
PO BOX 122, HEAFFORD JUNCTION, WI 54532-0122
PO BOX 123, HEAFFORD JUNCTION, WI 54532-0123
PO BOX 124, HEAFFORD JUNCTION, WI 54532-0124
PO BOX 125, HEAFFORD JUNCTION, WI 54532-0125
PO BOX 126, HEAFFORD JUNCTION, WI 54532-0126
PO BOX 127, HEAFFORD JUNCTION, WI 54532-0127
PO BOX 128, HEAFFORD JUNCTION, WI 54532-0128
PO BOX 129, HEAFFORD JUNCTION, WI 54532-0129
PO BOX 130, HEAFFORD JUNCTION, WI 54532-0130
PO BOX 131, HEAFFORD JUNCTION, WI 54532-0131
PO BOX 132, HEAFFORD JUNCTION, WI 54532-0132
PO BOX 133, HEAFFORD JUNCTION, WI 54532-0133
PO BOX 134, HEAFFORD JUNCTION, WI 54532-0134
PO BOX 135, HEAFFORD JUNCTION, WI 54532-0135
PO BOX 136, HEAFFORD JUNCTION, WI 54532-0136
PO BOX 137, HEAFFORD JUNCTION, WI 54532-0137
PO BOX 138, HEAFFORD JUNCTION, WI 54532-0138
PO BOX 139, HEAFFORD JUNCTION, WI 54532-0139
PO BOX 140, HEAFFORD JUNCTION, WI 54532-0140
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