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, NORTH SCITUATE, MA 02060-0001
PO BOX 2, NORTH SCITUATE, MA 02060-0002
PO BOX 3, NORTH SCITUATE, MA 02060-0003
PO BOX 4, NORTH SCITUATE, MA 02060-0004
PO BOX 5, NORTH SCITUATE, MA 02060-0005
PO BOX 6, NORTH SCITUATE, MA 02060-0006
PO BOX 7, NORTH SCITUATE, MA 02060-0007
PO BOX 8, NORTH SCITUATE, MA 02060-0008
PO BOX 9, NORTH SCITUATE, MA 02060-0009
PO BOX 10, NORTH SCITUATE, MA 02060-0010
PO BOX 11, NORTH SCITUATE, MA 02060-0011
PO BOX 12, NORTH SCITUATE, MA 02060-0012
PO BOX 13, NORTH SCITUATE, MA 02060-0013
PO BOX 14, NORTH SCITUATE, MA 02060-0014
PO BOX 15, NORTH SCITUATE, MA 02060-0015
PO BOX 16, NORTH SCITUATE, MA 02060-0016
PO BOX 17, NORTH SCITUATE, MA 02060-0017
PO BOX 18, NORTH SCITUATE, MA 02060-0018
PO BOX 19, NORTH SCITUATE, MA 02060-0019
PO BOX 20, NORTH SCITUATE, MA 02060-0020
PO BOX 21, NORTH SCITUATE, MA 02060-0021
PO BOX 22, NORTH SCITUATE, MA 02060-0022
PO BOX 23, NORTH SCITUATE, MA 02060-0023
PO BOX 24, NORTH SCITUATE, MA 02060-0024
PO BOX 25, NORTH SCITUATE, MA 02060-0025
PO BOX 26, NORTH SCITUATE, MA 02060-0026
PO BOX 27, NORTH SCITUATE, MA 02060-0027
PO BOX 28, NORTH SCITUATE, MA 02060-0028
PO BOX 29, NORTH SCITUATE, MA 02060-0029
PO BOX 30, NORTH SCITUATE, MA 02060-0030
PO BOX 31, NORTH SCITUATE, MA 02060-0031
PO BOX 32, NORTH SCITUATE, MA 02060-0032
PO BOX 33, NORTH SCITUATE, MA 02060-0033
PO BOX 34, NORTH SCITUATE, MA 02060-0034
PO BOX 35, NORTH SCITUATE, MA 02060-0035
PO BOX 36, NORTH SCITUATE, MA 02060-0036
PO BOX 37, NORTH SCITUATE, MA 02060-0037
PO BOX 38, NORTH SCITUATE, MA 02060-0038
PO BOX 39, NORTH SCITUATE, MA 02060-0039
PO BOX 40, NORTH SCITUATE, MA 02060-0040
PO BOX 41, NORTH SCITUATE, MA 02060-0041
PO BOX 42, NORTH SCITUATE, MA 02060-0042
PO BOX 43, NORTH SCITUATE, MA 02060-0043
PO BOX 44, NORTH SCITUATE, MA 02060-0044
PO BOX 45, NORTH SCITUATE, MA 02060-0045
PO BOX 46, NORTH SCITUATE, MA 02060-0046
PO BOX 47, NORTH SCITUATE, MA 02060-0047
PO BOX 48, NORTH SCITUATE, MA 02060-0048
PO BOX 49, NORTH SCITUATE, MA 02060-0049
PO BOX 50, NORTH SCITUATE, MA 02060-0050
PO BOX 51, NORTH SCITUATE, MA 02060-0051
PO BOX 52, NORTH SCITUATE, MA 02060-0052
PO BOX 53, NORTH SCITUATE, MA 02060-0053
PO BOX 54, NORTH SCITUATE, MA 02060-0054
PO BOX 55, NORTH SCITUATE, MA 02060-0055
PO BOX 56, NORTH SCITUATE, MA 02060-0056
PO BOX 57, NORTH SCITUATE, MA 02060-0057
PO BOX 58, NORTH SCITUATE, MA 02060-0058
PO BOX 59, NORTH SCITUATE, MA 02060-0059
PO BOX 60, NORTH SCITUATE, MA 02060-0060
PO BOX 61, NORTH SCITUATE, MA 02060-0061
PO BOX 62, NORTH SCITUATE, MA 02060-0062
PO BOX 63, NORTH SCITUATE, MA 02060-0063
PO BOX 64, NORTH SCITUATE, MA 02060-0064
PO BOX 65, NORTH SCITUATE, MA 02060-0065
PO BOX 66, NORTH SCITUATE, MA 02060-0066
PO BOX 67, NORTH SCITUATE, MA 02060-0067
PO BOX 68, NORTH SCITUATE, MA 02060-0068
PO BOX 69, NORTH SCITUATE, MA 02060-0069
PO BOX 70, NORTH SCITUATE, MA 02060-0070
PO BOX 71, NORTH SCITUATE, MA 02060-0071
PO BOX 72, NORTH SCITUATE, MA 02060-0072
PO BOX 73, NORTH SCITUATE, MA 02060-0073
PO BOX 74, NORTH SCITUATE, MA 02060-0074
PO BOX 75, NORTH SCITUATE, MA 02060-0075
PO BOX 76, NORTH SCITUATE, MA 02060-0076
PO BOX 77, NORTH SCITUATE, MA 02060-0077
PO BOX 78, NORTH SCITUATE, MA 02060-0078
PO BOX 79, NORTH SCITUATE, MA 02060-0079
PO BOX 80, NORTH SCITUATE, MA 02060-0080
PO BOX 81, NORTH SCITUATE, MA 02060-0081
PO BOX 82, NORTH SCITUATE, MA 02060-0082
PO BOX 83, NORTH SCITUATE, MA 02060-0083
PO BOX 84, NORTH SCITUATE, MA 02060-0084
PO BOX 85, NORTH SCITUATE, MA 02060-0085
PO BOX 86, NORTH SCITUATE, MA 02060-0086
PO BOX 87, NORTH SCITUATE, MA 02060-0087
PO BOX 88, NORTH SCITUATE, MA 02060-0088
PO BOX 89, NORTH SCITUATE, MA 02060-0089
PO BOX 90, NORTH SCITUATE, MA 02060-0090
PO BOX 91, NORTH SCITUATE, MA 02060-0091
PO BOX 92, NORTH SCITUATE, MA 02060-0092
PO BOX 93, NORTH SCITUATE, MA 02060-0093
PO BOX 94, NORTH SCITUATE, MA 02060-0094
PO BOX 95, NORTH SCITUATE, MA 02060-0095
PO BOX 96, NORTH SCITUATE, MA 02060-0096
PO BOX 97, NORTH SCITUATE, MA 02060-0097
PO BOX 98, NORTH SCITUATE, MA 02060-0098
PO BOX 99, NORTH SCITUATE, MA 02060-0099
PO BOX 100, NORTH SCITUATE, MA 02060-0100
PO BOX 101, NORTH SCITUATE, MA 02060-0101
PO BOX 102, NORTH SCITUATE, MA 02060-0102
PO BOX 103, NORTH SCITUATE, MA 02060-0103
PO BOX 104, NORTH SCITUATE, MA 02060-0104
PO BOX 105, NORTH SCITUATE, MA 02060-0105
PO BOX 106, NORTH SCITUATE, MA 02060-0106
PO BOX 107, NORTH SCITUATE, MA 02060-0107
PO BOX 108, NORTH SCITUATE, MA 02060-0108
PO BOX 109, NORTH SCITUATE, MA 02060-0109
PO BOX 110, NORTH SCITUATE, MA 02060-0110
PO BOX 111, NORTH SCITUATE, MA 02060-0111
PO BOX 112, NORTH SCITUATE, MA 02060-0112
PO BOX 113, NORTH SCITUATE, MA 02060-0113
PO BOX 114, NORTH SCITUATE, MA 02060-0114
PO BOX 115, NORTH SCITUATE, MA 02060-0115
PO BOX 116, NORTH SCITUATE, MA 02060-0116
PO BOX 117, NORTH SCITUATE, MA 02060-0117
PO BOX 118, NORTH SCITUATE, MA 02060-0118
PO BOX 119, NORTH SCITUATE, MA 02060-0119
PO BOX 120, NORTH SCITUATE, MA 02060-0120
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