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, CITRUS HEIGHTS, CA 95611-0001
PO BOX 2, CITRUS HEIGHTS, CA 95611-0002
PO BOX 3, CITRUS HEIGHTS, CA 95611-0003
PO BOX 4, CITRUS HEIGHTS, CA 95611-0004
PO BOX 5, CITRUS HEIGHTS, CA 95611-0005
PO BOX 6, CITRUS HEIGHTS, CA 95611-0006
PO BOX 7, CITRUS HEIGHTS, CA 95611-0007
PO BOX 8, CITRUS HEIGHTS, CA 95611-0008
PO BOX 9, CITRUS HEIGHTS, CA 95611-0009
PO BOX 10, CITRUS HEIGHTS, CA 95611-0010
PO BOX 11, CITRUS HEIGHTS, CA 95611-0011
PO BOX 12, CITRUS HEIGHTS, CA 95611-0012
PO BOX 13, CITRUS HEIGHTS, CA 95611-0013
PO BOX 14, CITRUS HEIGHTS, CA 95611-0014
PO BOX 15, CITRUS HEIGHTS, CA 95611-0015
PO BOX 16, CITRUS HEIGHTS, CA 95611-0016
PO BOX 17, CITRUS HEIGHTS, CA 95611-0017
PO BOX 18, CITRUS HEIGHTS, CA 95611-0018
PO BOX 19, CITRUS HEIGHTS, CA 95611-0019
PO BOX 20, CITRUS HEIGHTS, CA 95611-0020
PO BOX 21, CITRUS HEIGHTS, CA 95611-0021
PO BOX 22, CITRUS HEIGHTS, CA 95611-0022
PO BOX 23, CITRUS HEIGHTS, CA 95611-0023
PO BOX 24, CITRUS HEIGHTS, CA 95611-0024
PO BOX 25, CITRUS HEIGHTS, CA 95611-0025
PO BOX 26, CITRUS HEIGHTS, CA 95611-0026
PO BOX 27, CITRUS HEIGHTS, CA 95611-0027
PO BOX 28, CITRUS HEIGHTS, CA 95611-0028
PO BOX 29, CITRUS HEIGHTS, CA 95611-0029
PO BOX 30, CITRUS HEIGHTS, CA 95611-0030
PO BOX 31, CITRUS HEIGHTS, CA 95611-0031
PO BOX 32, CITRUS HEIGHTS, CA 95611-0032
PO BOX 33, CITRUS HEIGHTS, CA 95611-0033
PO BOX 34, CITRUS HEIGHTS, CA 95611-0034
PO BOX 35, CITRUS HEIGHTS, CA 95611-0035
PO BOX 36, CITRUS HEIGHTS, CA 95611-0036
PO BOX 37, CITRUS HEIGHTS, CA 95611-0037
PO BOX 38, CITRUS HEIGHTS, CA 95611-0038
PO BOX 39, CITRUS HEIGHTS, CA 95611-0039
PO BOX 40, CITRUS HEIGHTS, CA 95611-0040
PO BOX 41, CITRUS HEIGHTS, CA 95611-0041
PO BOX 42, CITRUS HEIGHTS, CA 95611-0042
PO BOX 43, CITRUS HEIGHTS, CA 95611-0043
PO BOX 44, CITRUS HEIGHTS, CA 95611-0044
PO BOX 45, CITRUS HEIGHTS, CA 95611-0045
PO BOX 46, CITRUS HEIGHTS, CA 95611-0046
PO BOX 47, CITRUS HEIGHTS, CA 95611-0047
PO BOX 48, CITRUS HEIGHTS, CA 95611-0048
PO BOX 49, CITRUS HEIGHTS, CA 95611-0049
PO BOX 50, CITRUS HEIGHTS, CA 95611-0050
PO BOX 51, CITRUS HEIGHTS, CA 95611-0051
PO BOX 52, CITRUS HEIGHTS, CA 95611-0052
PO BOX 53, CITRUS HEIGHTS, CA 95611-0053
PO BOX 54, CITRUS HEIGHTS, CA 95611-0054
PO BOX 55, CITRUS HEIGHTS, CA 95611-0055
PO BOX 56, CITRUS HEIGHTS, CA 95611-0056
PO BOX 57, CITRUS HEIGHTS, CA 95611-0057
PO BOX 58, CITRUS HEIGHTS, CA 95611-0058
PO BOX 59, CITRUS HEIGHTS, CA 95611-0059
PO BOX 60, CITRUS HEIGHTS, CA 95611-0060
PO BOX 61, CITRUS HEIGHTS, CA 95611-0061
PO BOX 62, CITRUS HEIGHTS, CA 95611-0062
PO BOX 63, CITRUS HEIGHTS, CA 95611-0063
PO BOX 64, CITRUS HEIGHTS, CA 95611-0064
PO BOX 65, CITRUS HEIGHTS, CA 95611-0065
PO BOX 66, CITRUS HEIGHTS, CA 95611-0066
PO BOX 67, CITRUS HEIGHTS, CA 95611-0067
PO BOX 68, CITRUS HEIGHTS, CA 95611-0068
PO BOX 69, CITRUS HEIGHTS, CA 95611-0069
PO BOX 70, CITRUS HEIGHTS, CA 95611-0070
PO BOX 71, CITRUS HEIGHTS, CA 95611-0071
PO BOX 72, CITRUS HEIGHTS, CA 95611-0072
PO BOX 73, CITRUS HEIGHTS, CA 95611-0073
PO BOX 74, CITRUS HEIGHTS, CA 95611-0074
PO BOX 75, CITRUS HEIGHTS, CA 95611-0075
PO BOX 76, CITRUS HEIGHTS, CA 95611-0076
PO BOX 77, CITRUS HEIGHTS, CA 95611-0077
PO BOX 78, CITRUS HEIGHTS, CA 95611-0078
PO BOX 79, CITRUS HEIGHTS, CA 95611-0079
PO BOX 80, CITRUS HEIGHTS, CA 95611-0080
PO BOX 81, CITRUS HEIGHTS, CA 95611-0081
PO BOX 82, CITRUS HEIGHTS, CA 95611-0082
PO BOX 83, CITRUS HEIGHTS, CA 95611-0083
PO BOX 84, CITRUS HEIGHTS, CA 95611-0084
PO BOX 85, CITRUS HEIGHTS, CA 95611-0085
PO BOX 86, CITRUS HEIGHTS, CA 95611-0086
PO BOX 87, CITRUS HEIGHTS, CA 95611-0087
PO BOX 88, CITRUS HEIGHTS, CA 95611-0088
PO BOX 89, CITRUS HEIGHTS, CA 95611-0089
PO BOX 90, CITRUS HEIGHTS, CA 95611-0090
PO BOX 91, CITRUS HEIGHTS, CA 95611-0091
PO BOX 92, CITRUS HEIGHTS, CA 95611-0092
PO BOX 93, CITRUS HEIGHTS, CA 95611-0093
PO BOX 94, CITRUS HEIGHTS, CA 95611-0094
PO BOX 95, CITRUS HEIGHTS, CA 95611-0095
PO BOX 96, CITRUS HEIGHTS, CA 95611-0096
PO BOX 97, CITRUS HEIGHTS, CA 95611-0097
PO BOX 98, CITRUS HEIGHTS, CA 95611-0098
PO BOX 99, CITRUS HEIGHTS, CA 95611-0099
PO BOX 100, CITRUS HEIGHTS, CA 95611-0100
PO BOX 101, CITRUS HEIGHTS, CA 95611-0101
PO BOX 102, CITRUS HEIGHTS, CA 95611-0102
PO BOX 103, CITRUS HEIGHTS, CA 95611-0103
PO BOX 104, CITRUS HEIGHTS, CA 95611-0104
PO BOX 105, CITRUS HEIGHTS, CA 95611-0105
PO BOX 106, CITRUS HEIGHTS, CA 95611-0106
PO BOX 107, CITRUS HEIGHTS, CA 95611-0107
PO BOX 108, CITRUS HEIGHTS, CA 95611-0108
PO BOX 109, CITRUS HEIGHTS, CA 95611-0109
PO BOX 110, CITRUS HEIGHTS, CA 95611-0110
PO BOX 111, CITRUS HEIGHTS, CA 95611-0111
PO BOX 112, CITRUS HEIGHTS, CA 95611-0112
PO BOX 113, CITRUS HEIGHTS, CA 95611-0113
PO BOX 114, CITRUS HEIGHTS, CA 95611-0114
PO BOX 115, CITRUS HEIGHTS, CA 95611-0115
PO BOX 116, CITRUS HEIGHTS, CA 95611-0116
PO BOX 117, CITRUS HEIGHTS, CA 95611-0117
PO BOX 118, CITRUS HEIGHTS, CA 95611-0118
PO BOX 119, CITRUS HEIGHTS, CA 95611-0119
PO BOX 120, CITRUS HEIGHTS, CA 95611-0120
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