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, NEW PORT RICHEY, FL 34656-0001
PO BOX 2, NEW PORT RICHEY, FL 34656-0002
PO BOX 3, NEW PORT RICHEY, FL 34656-0003
PO BOX 4, NEW PORT RICHEY, FL 34656-0004
PO BOX 5, NEW PORT RICHEY, FL 34656-0005
PO BOX 6, NEW PORT RICHEY, FL 34656-0006
PO BOX 7, NEW PORT RICHEY, FL 34656-0007
PO BOX 8, NEW PORT RICHEY, FL 34656-0008
PO BOX 9, NEW PORT RICHEY, FL 34656-0009
PO BOX 10, NEW PORT RICHEY, FL 34656-0010
PO BOX 11, NEW PORT RICHEY, FL 34656-0011
PO BOX 12, NEW PORT RICHEY, FL 34656-0012
PO BOX 13, NEW PORT RICHEY, FL 34656-0013
PO BOX 14, NEW PORT RICHEY, FL 34656-0014
PO BOX 15, NEW PORT RICHEY, FL 34656-0015
PO BOX 16, NEW PORT RICHEY, FL 34656-0016
PO BOX 17, NEW PORT RICHEY, FL 34656-0017
PO BOX 18, NEW PORT RICHEY, FL 34656-0018
PO BOX 19, NEW PORT RICHEY, FL 34656-0019
PO BOX 20, NEW PORT RICHEY, FL 34656-0020
PO BOX 21, NEW PORT RICHEY, FL 34656-0021
PO BOX 22, NEW PORT RICHEY, FL 34656-0022
PO BOX 23, NEW PORT RICHEY, FL 34656-0023
PO BOX 24, NEW PORT RICHEY, FL 34656-0024
PO BOX 25, NEW PORT RICHEY, FL 34656-0025
PO BOX 26, NEW PORT RICHEY, FL 34656-0026
PO BOX 27, NEW PORT RICHEY, FL 34656-0027
PO BOX 28, NEW PORT RICHEY, FL 34656-0028
PO BOX 29, NEW PORT RICHEY, FL 34656-0029
PO BOX 30, NEW PORT RICHEY, FL 34656-0030
PO BOX 31, NEW PORT RICHEY, FL 34656-0031
PO BOX 32, NEW PORT RICHEY, FL 34656-0032
PO BOX 33, NEW PORT RICHEY, FL 34656-0033
PO BOX 34, NEW PORT RICHEY, FL 34656-0034
PO BOX 35, NEW PORT RICHEY, FL 34656-0035
PO BOX 36, NEW PORT RICHEY, FL 34656-0036
PO BOX 37, NEW PORT RICHEY, FL 34656-0037
PO BOX 38, NEW PORT RICHEY, FL 34656-0038
PO BOX 39, NEW PORT RICHEY, FL 34656-0039
PO BOX 40, NEW PORT RICHEY, FL 34656-0040
PO BOX 41, NEW PORT RICHEY, FL 34656-0041
PO BOX 42, NEW PORT RICHEY, FL 34656-0042
PO BOX 43, NEW PORT RICHEY, FL 34656-0043
PO BOX 44, NEW PORT RICHEY, FL 34656-0044
PO BOX 45, NEW PORT RICHEY, FL 34656-0045
PO BOX 46, NEW PORT RICHEY, FL 34656-0046
PO BOX 47, NEW PORT RICHEY, FL 34656-0047
PO BOX 48, NEW PORT RICHEY, FL 34656-0048
PO BOX 49, NEW PORT RICHEY, FL 34656-0049
PO BOX 50, NEW PORT RICHEY, FL 34656-0050
PO BOX 51, NEW PORT RICHEY, FL 34656-0051
PO BOX 52, NEW PORT RICHEY, FL 34656-0052
PO BOX 53, NEW PORT RICHEY, FL 34656-0053
PO BOX 54, NEW PORT RICHEY, FL 34656-0054
PO BOX 55, NEW PORT RICHEY, FL 34656-0055
PO BOX 56, NEW PORT RICHEY, FL 34656-0056
PO BOX 57, NEW PORT RICHEY, FL 34656-0057
PO BOX 58, NEW PORT RICHEY, FL 34656-0058
PO BOX 59, NEW PORT RICHEY, FL 34656-0059
PO BOX 60, NEW PORT RICHEY, FL 34656-0060
PO BOX 61, NEW PORT RICHEY, FL 34656-0061
PO BOX 62, NEW PORT RICHEY, FL 34656-0062
PO BOX 63, NEW PORT RICHEY, FL 34656-0063
PO BOX 64, NEW PORT RICHEY, FL 34656-0064
PO BOX 65, NEW PORT RICHEY, FL 34656-0065
PO BOX 66, NEW PORT RICHEY, FL 34656-0066
PO BOX 67, NEW PORT RICHEY, FL 34656-0067
PO BOX 68, NEW PORT RICHEY, FL 34656-0068
PO BOX 69, NEW PORT RICHEY, FL 34656-0069
PO BOX 70, NEW PORT RICHEY, FL 34656-0070
PO BOX 71, NEW PORT RICHEY, FL 34656-0071
PO BOX 72, NEW PORT RICHEY, FL 34656-0072
PO BOX 73, NEW PORT RICHEY, FL 34656-0073
PO BOX 74, NEW PORT RICHEY, FL 34656-0074
PO BOX 75, NEW PORT RICHEY, FL 34656-0075
PO BOX 76, NEW PORT RICHEY, FL 34656-0076
PO BOX 77, NEW PORT RICHEY, FL 34656-0077
PO BOX 78, NEW PORT RICHEY, FL 34656-0078
PO BOX 79, NEW PORT RICHEY, FL 34656-0079
PO BOX 80, NEW PORT RICHEY, FL 34656-0080
PO BOX 81, NEW PORT RICHEY, FL 34656-0081
PO BOX 82, NEW PORT RICHEY, FL 34656-0082
PO BOX 83, NEW PORT RICHEY, FL 34656-0083
PO BOX 84, NEW PORT RICHEY, FL 34656-0084
PO BOX 85, NEW PORT RICHEY, FL 34656-0085
PO BOX 86, NEW PORT RICHEY, FL 34656-0086
PO BOX 87, NEW PORT RICHEY, FL 34656-0087
PO BOX 88, NEW PORT RICHEY, FL 34656-0088
PO BOX 89, NEW PORT RICHEY, FL 34656-0089
PO BOX 90, NEW PORT RICHEY, FL 34656-0090
PO BOX 91, NEW PORT RICHEY, FL 34656-0091
PO BOX 92, NEW PORT RICHEY, FL 34656-0092
PO BOX 93, NEW PORT RICHEY, FL 34656-0093
PO BOX 94, NEW PORT RICHEY, FL 34656-0094
PO BOX 95, NEW PORT RICHEY, FL 34656-0095
PO BOX 96, NEW PORT RICHEY, FL 34656-0096
PO BOX 97, NEW PORT RICHEY, FL 34656-0097
PO BOX 98, NEW PORT RICHEY, FL 34656-0098
PO BOX 99, NEW PORT RICHEY, FL 34656-0099
PO BOX 100, NEW PORT RICHEY, FL 34656-0100
PO BOX 101, NEW PORT RICHEY, FL 34656-0101
PO BOX 102, NEW PORT RICHEY, FL 34656-0102
PO BOX 103, NEW PORT RICHEY, FL 34656-0103
PO BOX 104, NEW PORT RICHEY, FL 34656-0104
PO BOX 105, NEW PORT RICHEY, FL 34656-0105
PO BOX 106, NEW PORT RICHEY, FL 34656-0106
PO BOX 107, NEW PORT RICHEY, FL 34656-0107
PO BOX 108, NEW PORT RICHEY, FL 34656-0108
PO BOX 109, NEW PORT RICHEY, FL 34656-0109
PO BOX 110, NEW PORT RICHEY, FL 34656-0110
PO BOX 111, NEW PORT RICHEY, FL 34656-0111
PO BOX 112, NEW PORT RICHEY, FL 34656-0112
PO BOX 113, NEW PORT RICHEY, FL 34656-0113
PO BOX 114, NEW PORT RICHEY, FL 34656-0114
PO BOX 115, NEW PORT RICHEY, FL 34656-0115
PO BOX 116, NEW PORT RICHEY, FL 34656-0116
PO BOX 117, NEW PORT RICHEY, FL 34656-0117
PO BOX 118, NEW PORT RICHEY, FL 34656-0118
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