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, FERNANDINA BEACH, FL 32035-0001
PO BOX 2, FERNANDINA BEACH, FL 32035-0002
PO BOX 3, FERNANDINA BEACH, FL 32035-0003
PO BOX 4, FERNANDINA BEACH, FL 32035-0004
PO BOX 5, FERNANDINA BEACH, FL 32035-0005
PO BOX 6, FERNANDINA BEACH, FL 32035-0006
PO BOX 7, FERNANDINA BEACH, FL 32035-0007
PO BOX 8, FERNANDINA BEACH, FL 32035-0008
PO BOX 9, FERNANDINA BEACH, FL 32035-0009
PO BOX 10, FERNANDINA BEACH, FL 32035-0010
PO BOX 11, FERNANDINA BEACH, FL 32035-0011
PO BOX 12, FERNANDINA BEACH, FL 32035-0012
PO BOX 13, FERNANDINA BEACH, FL 32035-0013
PO BOX 14, FERNANDINA BEACH, FL 32035-0014
PO BOX 15, FERNANDINA BEACH, FL 32035-0015
PO BOX 16, FERNANDINA BEACH, FL 32035-0016
PO BOX 17, FERNANDINA BEACH, FL 32035-0017
PO BOX 18, FERNANDINA BEACH, FL 32035-0018
PO BOX 19, FERNANDINA BEACH, FL 32035-0019
PO BOX 20, FERNANDINA BEACH, FL 32035-0020
PO BOX 21, FERNANDINA BEACH, FL 32035-0021
PO BOX 22, FERNANDINA BEACH, FL 32035-0022
PO BOX 23, FERNANDINA BEACH, FL 32035-0023
PO BOX 24, FERNANDINA BEACH, FL 32035-0024
PO BOX 25, FERNANDINA BEACH, FL 32035-0025
PO BOX 26, FERNANDINA BEACH, FL 32035-0026
PO BOX 27, FERNANDINA BEACH, FL 32035-0027
PO BOX 28, FERNANDINA BEACH, FL 32035-0028
PO BOX 29, FERNANDINA BEACH, FL 32035-0029
PO BOX 30, FERNANDINA BEACH, FL 32035-0030
PO BOX 31, FERNANDINA BEACH, FL 32035-0031
PO BOX 32, FERNANDINA BEACH, FL 32035-0032
PO BOX 33, FERNANDINA BEACH, FL 32035-0033
PO BOX 34, FERNANDINA BEACH, FL 32035-0034
PO BOX 35, FERNANDINA BEACH, FL 32035-0035
PO BOX 36, FERNANDINA BEACH, FL 32035-0036
PO BOX 37, FERNANDINA BEACH, FL 32035-0037
PO BOX 38, FERNANDINA BEACH, FL 32035-0038
PO BOX 39, FERNANDINA BEACH, FL 32035-0039
PO BOX 40, FERNANDINA BEACH, FL 32035-0040
PO BOX 41, FERNANDINA BEACH, FL 32035-0041
PO BOX 42, FERNANDINA BEACH, FL 32035-0042
PO BOX 43, FERNANDINA BEACH, FL 32035-0043
PO BOX 44, FERNANDINA BEACH, FL 32035-0044
PO BOX 45, FERNANDINA BEACH, FL 32035-0045
PO BOX 46, FERNANDINA BEACH, FL 32035-0046
PO BOX 47, FERNANDINA BEACH, FL 32035-0047
PO BOX 48, FERNANDINA BEACH, FL 32035-0048
PO BOX 49, FERNANDINA BEACH, FL 32035-0049
PO BOX 50, FERNANDINA BEACH, FL 32035-0050
PO BOX 51, FERNANDINA BEACH, FL 32035-0051
PO BOX 52, FERNANDINA BEACH, FL 32035-0052
PO BOX 53, FERNANDINA BEACH, FL 32035-0053
PO BOX 54, FERNANDINA BEACH, FL 32035-0054
PO BOX 55, FERNANDINA BEACH, FL 32035-0055
PO BOX 56, FERNANDINA BEACH, FL 32035-0056
PO BOX 57, FERNANDINA BEACH, FL 32035-0057
PO BOX 58, FERNANDINA BEACH, FL 32035-0058
PO BOX 59, FERNANDINA BEACH, FL 32035-0059
PO BOX 60, FERNANDINA BEACH, FL 32035-0060
PO BOX 61, FERNANDINA BEACH, FL 32035-0061
PO BOX 62, FERNANDINA BEACH, FL 32035-0062
PO BOX 63, FERNANDINA BEACH, FL 32035-0063
PO BOX 64, FERNANDINA BEACH, FL 32035-0064
PO BOX 65, FERNANDINA BEACH, FL 32035-0065
PO BOX 66, FERNANDINA BEACH, FL 32035-0066
PO BOX 67, FERNANDINA BEACH, FL 32035-0067
PO BOX 68, FERNANDINA BEACH, FL 32035-0068
PO BOX 69, FERNANDINA BEACH, FL 32035-0069
PO BOX 70, FERNANDINA BEACH, FL 32035-0070
PO BOX 71, FERNANDINA BEACH, FL 32035-0071
PO BOX 72, FERNANDINA BEACH, FL 32035-0072
PO BOX 73, FERNANDINA BEACH, FL 32035-0073
PO BOX 74, FERNANDINA BEACH, FL 32035-0074
PO BOX 75, FERNANDINA BEACH, FL 32035-0075
PO BOX 76, FERNANDINA BEACH, FL 32035-0076
PO BOX 77, FERNANDINA BEACH, FL 32035-0077
PO BOX 78, FERNANDINA BEACH, FL 32035-0078
PO BOX 79, FERNANDINA BEACH, FL 32035-0079
PO BOX 80, FERNANDINA BEACH, FL 32035-0080
PO BOX 81, FERNANDINA BEACH, FL 32035-0081
PO BOX 82, FERNANDINA BEACH, FL 32035-0082
PO BOX 83, FERNANDINA BEACH, FL 32035-0083
PO BOX 84, FERNANDINA BEACH, FL 32035-0084
PO BOX 85, FERNANDINA BEACH, FL 32035-0085
PO BOX 86, FERNANDINA BEACH, FL 32035-0086
PO BOX 87, FERNANDINA BEACH, FL 32035-0087
PO BOX 88, FERNANDINA BEACH, FL 32035-0088
PO BOX 89, FERNANDINA BEACH, FL 32035-0089
PO BOX 90, FERNANDINA BEACH, FL 32035-0090
PO BOX 91, FERNANDINA BEACH, FL 32035-0091
PO BOX 92, FERNANDINA BEACH, FL 32035-0092
PO BOX 93, FERNANDINA BEACH, FL 32035-0093
PO BOX 94, FERNANDINA BEACH, FL 32035-0094
PO BOX 95, FERNANDINA BEACH, FL 32035-0095
PO BOX 96, FERNANDINA BEACH, FL 32035-0096
PO BOX 97, FERNANDINA BEACH, FL 32035-0097
PO BOX 98, FERNANDINA BEACH, FL 32035-0098
PO BOX 99, FERNANDINA BEACH, FL 32035-0099
PO BOX 100, FERNANDINA BEACH, FL 32035-0100
PO BOX 101, FERNANDINA BEACH, FL 32035-0101
PO BOX 102, FERNANDINA BEACH, FL 32035-0102
PO BOX 103, FERNANDINA BEACH, FL 32035-0103
PO BOX 104, FERNANDINA BEACH, FL 32035-0104
PO BOX 105, FERNANDINA BEACH, FL 32035-0105
PO BOX 106, FERNANDINA BEACH, FL 32035-0106
PO BOX 107, FERNANDINA BEACH, FL 32035-0107
PO BOX 108, FERNANDINA BEACH, FL 32035-0108
PO BOX 109, FERNANDINA BEACH, FL 32035-0109
PO BOX 110, FERNANDINA BEACH, FL 32035-0110
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