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, POMFRET CENTER, CT 06259-0001
PO BOX 2, POMFRET CENTER, CT 06259-0002
PO BOX 3, POMFRET CENTER, CT 06259-0003
PO BOX 4, POMFRET CENTER, CT 06259-0004
PO BOX 5, POMFRET CENTER, CT 06259-0005
PO BOX 6, POMFRET CENTER, CT 06259-0006
PO BOX 7, POMFRET CENTER, CT 06259-0007
PO BOX 8, POMFRET CENTER, CT 06259-0008
PO BOX 9, POMFRET CENTER, CT 06259-0009
PO BOX 10, POMFRET CENTER, CT 06259-0010
PO BOX 11, POMFRET CENTER, CT 06259-0011
PO BOX 12, POMFRET CENTER, CT 06259-0012
PO BOX 13, POMFRET CENTER, CT 06259-0013
PO BOX 14, POMFRET CENTER, CT 06259-0014
PO BOX 15, POMFRET CENTER, CT 06259-0015
PO BOX 16, POMFRET CENTER, CT 06259-0016
PO BOX 17, POMFRET CENTER, CT 06259-0017
PO BOX 18, POMFRET CENTER, CT 06259-0018
PO BOX 19, POMFRET CENTER, CT 06259-0019
PO BOX 20, POMFRET CENTER, CT 06259-0020
PO BOX 21, POMFRET CENTER, CT 06259-0021
PO BOX 22, POMFRET CENTER, CT 06259-0022
PO BOX 23, POMFRET CENTER, CT 06259-0023
PO BOX 24, POMFRET CENTER, CT 06259-0024
PO BOX 25, POMFRET CENTER, CT 06259-0025
PO BOX 26, POMFRET CENTER, CT 06259-0026
PO BOX 27, POMFRET CENTER, CT 06259-0027
PO BOX 28, POMFRET CENTER, CT 06259-0028
PO BOX 29, POMFRET CENTER, CT 06259-0029
PO BOX 30, POMFRET CENTER, CT 06259-0030
PO BOX 31, POMFRET CENTER, CT 06259-0031
PO BOX 32, POMFRET CENTER, CT 06259-0032
PO BOX 33, POMFRET CENTER, CT 06259-0033
PO BOX 34, POMFRET CENTER, CT 06259-0034
PO BOX 35, POMFRET CENTER, CT 06259-0035
PO BOX 36, POMFRET CENTER, CT 06259-0036
PO BOX 37, POMFRET CENTER, CT 06259-0037
PO BOX 38, POMFRET CENTER, CT 06259-0038
PO BOX 39, POMFRET CENTER, CT 06259-0039
PO BOX 40, POMFRET CENTER, CT 06259-0040
PO BOX 41, POMFRET CENTER, CT 06259-0041
PO BOX 42, POMFRET CENTER, CT 06259-0042
PO BOX 43, POMFRET CENTER, CT 06259-0043
PO BOX 44, POMFRET CENTER, CT 06259-0044
PO BOX 45, POMFRET CENTER, CT 06259-0045
PO BOX 46, POMFRET CENTER, CT 06259-0046
PO BOX 47, POMFRET CENTER, CT 06259-0047
PO BOX 48, POMFRET CENTER, CT 06259-0048
PO BOX 49, POMFRET CENTER, CT 06259-0049
PO BOX 50, POMFRET CENTER, CT 06259-0050
PO BOX 51, POMFRET CENTER, CT 06259-0051
PO BOX 52, POMFRET CENTER, CT 06259-0052
PO BOX 53, POMFRET CENTER, CT 06259-0053
PO BOX 54, POMFRET CENTER, CT 06259-0054
PO BOX 55, POMFRET CENTER, CT 06259-0055
PO BOX 56, POMFRET CENTER, CT 06259-0056
PO BOX 57, POMFRET CENTER, CT 06259-0057
PO BOX 58, POMFRET CENTER, CT 06259-0058
PO BOX 59, POMFRET CENTER, CT 06259-0059
PO BOX 60, POMFRET CENTER, CT 06259-0060
PO BOX 61, POMFRET CENTER, CT 06259-0061
PO BOX 62, POMFRET CENTER, CT 06259-0062
PO BOX 63, POMFRET CENTER, CT 06259-0063
PO BOX 64, POMFRET CENTER, CT 06259-0064
PO BOX 65, POMFRET CENTER, CT 06259-0065
PO BOX 66, POMFRET CENTER, CT 06259-0066
PO BOX 67, POMFRET CENTER, CT 06259-0067
PO BOX 68, POMFRET CENTER, CT 06259-0068
PO BOX 69, POMFRET CENTER, CT 06259-0069
PO BOX 70, POMFRET CENTER, CT 06259-0070
PO BOX 71, POMFRET CENTER, CT 06259-0071
PO BOX 72, POMFRET CENTER, CT 06259-0072
PO BOX 73, POMFRET CENTER, CT 06259-0073
PO BOX 74, POMFRET CENTER, CT 06259-0074
PO BOX 75, POMFRET CENTER, CT 06259-0075
PO BOX 76, POMFRET CENTER, CT 06259-0076
PO BOX 77, POMFRET CENTER, CT 06259-0077
PO BOX 78, POMFRET CENTER, CT 06259-0078
PO BOX 79, POMFRET CENTER, CT 06259-0079
PO BOX 80, POMFRET CENTER, CT 06259-0080
PO BOX 81, POMFRET CENTER, CT 06259-0081
PO BOX 82, POMFRET CENTER, CT 06259-0082
PO BOX 83, POMFRET CENTER, CT 06259-0083
PO BOX 84, POMFRET CENTER, CT 06259-0084
PO BOX 85, POMFRET CENTER, CT 06259-0085
PO BOX 86, POMFRET CENTER, CT 06259-0086
PO BOX 87, POMFRET CENTER, CT 06259-0087
PO BOX 88, POMFRET CENTER, CT 06259-0088
PO BOX 89, POMFRET CENTER, CT 06259-0089
PO BOX 90, POMFRET CENTER, CT 06259-0090
PO BOX 91, POMFRET CENTER, CT 06259-0091
PO BOX 92, POMFRET CENTER, CT 06259-0092
PO BOX 93, POMFRET CENTER, CT 06259-0093
PO BOX 94, POMFRET CENTER, CT 06259-0094
PO BOX 95, POMFRET CENTER, CT 06259-0095
PO BOX 96, POMFRET CENTER, CT 06259-0096
PO BOX 97, POMFRET CENTER, CT 06259-0097
PO BOX 98, POMFRET CENTER, CT 06259-0098
PO BOX 99, POMFRET CENTER, CT 06259-0099
PO BOX 100, POMFRET CENTER, CT 06259-0100
PO BOX 101, POMFRET CENTER, CT 06259-0101
PO BOX 102, POMFRET CENTER, CT 06259-0102
PO BOX 103, POMFRET CENTER, CT 06259-0103
PO BOX 104, POMFRET CENTER, CT 06259-0104
PO BOX 105, POMFRET CENTER, CT 06259-0105
PO BOX 106, POMFRET CENTER, CT 06259-0106
PO BOX 107, POMFRET CENTER, CT 06259-0107
PO BOX 108, POMFRET CENTER, CT 06259-0108
PO BOX 109, POMFRET CENTER, CT 06259-0109
PO BOX 110, POMFRET CENTER, CT 06259-0110
PO BOX 111, POMFRET CENTER, CT 06259-0111
PO BOX 112, POMFRET CENTER, CT 06259-0112
PO BOX 113, POMFRET CENTER, CT 06259-0113
PO BOX 114, POMFRET CENTER, CT 06259-0114
PO BOX 115, POMFRET CENTER, CT 06259-0115
PO BOX 116, POMFRET CENTER, CT 06259-0116
PO BOX 117, POMFRET CENTER, CT 06259-0117
PO BOX 118, POMFRET CENTER, CT 06259-0118
PO BOX 119, POMFRET CENTER, CT 06259-0119
PO BOX 120, POMFRET CENTER, CT 06259-0120
PO BOX 121, POMFRET CENTER, CT 06259-0121
PO BOX 122, POMFRET CENTER, CT 06259-0122
PO BOX 123, POMFRET CENTER, CT 06259-0123
PO BOX 124, POMFRET CENTER, CT 06259-0124
PO BOX 125, POMFRET CENTER, CT 06259-0125
PO BOX 126, POMFRET CENTER, CT 06259-0126
PO BOX 127, POMFRET CENTER, CT 06259-0127
PO BOX 128, POMFRET CENTER, CT 06259-0128
PO BOX 129, POMFRET CENTER, CT 06259-0129
PO BOX 130, POMFRET CENTER, CT 06259-0130
PO BOX 131, POMFRET CENTER, CT 06259-0131
PO BOX 132, POMFRET CENTER, CT 06259-0132
PO BOX 133, POMFRET CENTER, CT 06259-0133
PO BOX 134, POMFRET CENTER, CT 06259-0134
PO BOX 135, POMFRET CENTER, CT 06259-0135
PO BOX 136, POMFRET CENTER, CT 06259-0136
PO BOX 137, POMFRET CENTER, CT 06259-0137
PO BOX 138, POMFRET CENTER, CT 06259-0138
PO BOX 139, POMFRET CENTER, CT 06259-0139
PO BOX 140, POMFRET CENTER, CT 06259-0140
PO BOX 141, POMFRET CENTER, CT 06259-0141
PO BOX 142, POMFRET CENTER, CT 06259-0142
PO BOX 143, POMFRET CENTER, CT 06259-0143
PO BOX 144, POMFRET CENTER, CT 06259-0144
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