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, SAINT JOHNSBURY CENTER, VT 05863-0001
PO BOX 2, SAINT JOHNSBURY CENTER, VT 05863-0002
PO BOX 3, SAINT JOHNSBURY CENTER, VT 05863-0003
PO BOX 4, SAINT JOHNSBURY CENTER, VT 05863-0004
PO BOX 5, SAINT JOHNSBURY CENTER, VT 05863-0005
PO BOX 6, SAINT JOHNSBURY CENTER, VT 05863-0006
PO BOX 7, SAINT JOHNSBURY CENTER, VT 05863-0007
PO BOX 8, SAINT JOHNSBURY CENTER, VT 05863-0008
PO BOX 9, SAINT JOHNSBURY CENTER, VT 05863-0009
PO BOX 10, SAINT JOHNSBURY CENTER, VT 05863-0010
PO BOX 11, SAINT JOHNSBURY CENTER, VT 05863-0011
PO BOX 12, SAINT JOHNSBURY CENTER, VT 05863-0012
PO BOX 13, SAINT JOHNSBURY CENTER, VT 05863-0013
PO BOX 14, SAINT JOHNSBURY CENTER, VT 05863-0014
PO BOX 15, SAINT JOHNSBURY CENTER, VT 05863-0015
PO BOX 16, SAINT JOHNSBURY CENTER, VT 05863-0016
PO BOX 17, SAINT JOHNSBURY CENTER, VT 05863-0017
PO BOX 18, SAINT JOHNSBURY CENTER, VT 05863-0018
PO BOX 19, SAINT JOHNSBURY CENTER, VT 05863-0019
PO BOX 20, SAINT JOHNSBURY CENTER, VT 05863-0020
PO BOX 21, SAINT JOHNSBURY CENTER, VT 05863-0021
PO BOX 22, SAINT JOHNSBURY CENTER, VT 05863-0022
PO BOX 23, SAINT JOHNSBURY CENTER, VT 05863-0023
PO BOX 24, SAINT JOHNSBURY CENTER, VT 05863-0024
PO BOX 25, SAINT JOHNSBURY CENTER, VT 05863-0025
PO BOX 26, SAINT JOHNSBURY CENTER, VT 05863-0026
PO BOX 27, SAINT JOHNSBURY CENTER, VT 05863-0027
PO BOX 28, SAINT JOHNSBURY CENTER, VT 05863-0028
PO BOX 29, SAINT JOHNSBURY CENTER, VT 05863-0029
PO BOX 30, SAINT JOHNSBURY CENTER, VT 05863-0030
PO BOX 31, SAINT JOHNSBURY CENTER, VT 05863-0031
PO BOX 32, SAINT JOHNSBURY CENTER, VT 05863-0032
PO BOX 33, SAINT JOHNSBURY CENTER, VT 05863-0033
PO BOX 34, SAINT JOHNSBURY CENTER, VT 05863-0034
PO BOX 35, SAINT JOHNSBURY CENTER, VT 05863-0035
PO BOX 36, SAINT JOHNSBURY CENTER, VT 05863-0036
PO BOX 37, SAINT JOHNSBURY CENTER, VT 05863-0037
PO BOX 38, SAINT JOHNSBURY CENTER, VT 05863-0038
PO BOX 39, SAINT JOHNSBURY CENTER, VT 05863-0039
PO BOX 40, SAINT JOHNSBURY CENTER, VT 05863-0040
PO BOX 41, SAINT JOHNSBURY CENTER, VT 05863-0041
PO BOX 42, SAINT JOHNSBURY CENTER, VT 05863-0042
PO BOX 43, SAINT JOHNSBURY CENTER, VT 05863-0043
PO BOX 44, SAINT JOHNSBURY CENTER, VT 05863-0044
PO BOX 45, SAINT JOHNSBURY CENTER, VT 05863-0045
PO BOX 46, SAINT JOHNSBURY CENTER, VT 05863-0046
PO BOX 47, SAINT JOHNSBURY CENTER, VT 05863-0047
PO BOX 48, SAINT JOHNSBURY CENTER, VT 05863-0048
PO BOX 49, SAINT JOHNSBURY CENTER, VT 05863-0049
PO BOX 50, SAINT JOHNSBURY CENTER, VT 05863-0050
PO BOX 51, SAINT JOHNSBURY CENTER, VT 05863-0051
PO BOX 52, SAINT JOHNSBURY CENTER, VT 05863-0052
PO BOX 53, SAINT JOHNSBURY CENTER, VT 05863-0053
PO BOX 54, SAINT JOHNSBURY CENTER, VT 05863-0054
PO BOX 55, SAINT JOHNSBURY CENTER, VT 05863-0055
PO BOX 56, SAINT JOHNSBURY CENTER, VT 05863-0056
PO BOX 57, SAINT JOHNSBURY CENTER, VT 05863-0057
PO BOX 58, SAINT JOHNSBURY CENTER, VT 05863-0058
PO BOX 59, SAINT JOHNSBURY CENTER, VT 05863-0059
PO BOX 60, SAINT JOHNSBURY CENTER, VT 05863-0060
PO BOX 61, SAINT JOHNSBURY CENTER, VT 05863-0061
PO BOX 62, SAINT JOHNSBURY CENTER, VT 05863-0062
PO BOX 63, SAINT JOHNSBURY CENTER, VT 05863-0063
PO BOX 64, SAINT JOHNSBURY CENTER, VT 05863-0064
PO BOX 65, SAINT JOHNSBURY CENTER, VT 05863-0065
PO BOX 66, SAINT JOHNSBURY CENTER, VT 05863-0066
PO BOX 67, SAINT JOHNSBURY CENTER, VT 05863-0067
PO BOX 68, SAINT JOHNSBURY CENTER, VT 05863-0068
PO BOX 69, SAINT JOHNSBURY CENTER, VT 05863-0069
PO BOX 70, SAINT JOHNSBURY CENTER, VT 05863-0070
PO BOX 71, SAINT JOHNSBURY CENTER, VT 05863-0071
PO BOX 72, SAINT JOHNSBURY CENTER, VT 05863-0072
PO BOX 73, SAINT JOHNSBURY CENTER, VT 05863-0073
PO BOX 74, SAINT JOHNSBURY CENTER, VT 05863-0074
PO BOX 75, SAINT JOHNSBURY CENTER, VT 05863-0075
PO BOX 76, SAINT JOHNSBURY CENTER, VT 05863-0076
PO BOX 77, SAINT JOHNSBURY CENTER, VT 05863-0077
PO BOX 78, SAINT JOHNSBURY CENTER, VT 05863-0078
PO BOX 79, SAINT JOHNSBURY CENTER, VT 05863-0079
PO BOX 80, SAINT JOHNSBURY CENTER, VT 05863-0080
PO BOX 81, SAINT JOHNSBURY CENTER, VT 05863-0081
PO BOX 82, SAINT JOHNSBURY CENTER, VT 05863-0082
PO BOX 83, SAINT JOHNSBURY CENTER, VT 05863-0083
PO BOX 84, SAINT JOHNSBURY CENTER, VT 05863-0084
PO BOX 85, SAINT JOHNSBURY CENTER, VT 05863-0085
PO BOX 86, SAINT JOHNSBURY CENTER, VT 05863-0086
PO BOX 87, SAINT JOHNSBURY CENTER, VT 05863-0087
PO BOX 88, SAINT JOHNSBURY CENTER, VT 05863-0088
PO BOX 89, SAINT JOHNSBURY CENTER, VT 05863-0089
PO BOX 90, SAINT JOHNSBURY CENTER, VT 05863-0090
PO BOX 91, SAINT JOHNSBURY CENTER, VT 05863-0091
PO BOX 92, SAINT JOHNSBURY CENTER, VT 05863-0092
PO BOX 93, SAINT JOHNSBURY CENTER, VT 05863-0093
PO BOX 94, SAINT JOHNSBURY CENTER, VT 05863-0094
PO BOX 95, SAINT JOHNSBURY CENTER, VT 05863-0095
PO BOX 96, SAINT JOHNSBURY CENTER, VT 05863-0096
PO BOX 97, SAINT JOHNSBURY CENTER, VT 05863-0097
PO BOX 98, SAINT JOHNSBURY CENTER, VT 05863-0098
PO BOX 99, SAINT JOHNSBURY CENTER, VT 05863-0099
PO BOX 100, SAINT JOHNSBURY CENTER, VT 05863-0100
PO BOX 101, SAINT JOHNSBURY CENTER, VT 05863-0101
PO BOX 102, SAINT JOHNSBURY CENTER, VT 05863-0102
PO BOX 103, SAINT JOHNSBURY CENTER, VT 05863-0103
PO BOX 104, SAINT JOHNSBURY CENTER, VT 05863-0104
PO BOX 105, SAINT JOHNSBURY CENTER, VT 05863-0105
PO BOX 106, SAINT JOHNSBURY CENTER, VT 05863-0106
PO BOX 107, SAINT JOHNSBURY CENTER, VT 05863-0107
PO BOX 108, SAINT JOHNSBURY CENTER, VT 05863-0108
PO BOX 109, SAINT JOHNSBURY CENTER, VT 05863-0109
PO BOX 110, SAINT JOHNSBURY CENTER, VT 05863-0110
PO BOX 111, SAINT JOHNSBURY CENTER, VT 05863-0111
PO BOX 112, SAINT JOHNSBURY CENTER, VT 05863-0112
PO BOX 113, SAINT JOHNSBURY CENTER, VT 05863-0113
PO BOX 114, SAINT JOHNSBURY CENTER, VT 05863-0114
PO BOX 115, SAINT JOHNSBURY CENTER, VT 05863-0115
PO BOX 116, SAINT JOHNSBURY CENTER, VT 05863-0116
PO BOX 117, SAINT JOHNSBURY CENTER, VT 05863-0117
PO BOX 118, SAINT JOHNSBURY CENTER, VT 05863-0118
PO BOX 119, SAINT JOHNSBURY CENTER, VT 05863-0119
PO BOX 120, SAINT JOHNSBURY CENTER, VT 05863-0120
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