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, WOODLAND PARK, CO 80866-0001
PO BOX 2, WOODLAND PARK, CO 80866-0002
PO BOX 3, WOODLAND PARK, CO 80866-0003
PO BOX 4, WOODLAND PARK, CO 80866-0004
PO BOX 5, WOODLAND PARK, CO 80866-0005
PO BOX 6, WOODLAND PARK, CO 80866-0006
PO BOX 7, WOODLAND PARK, CO 80866-0007
PO BOX 8, WOODLAND PARK, CO 80866-0008
PO BOX 9, WOODLAND PARK, CO 80866-0009
PO BOX 10, WOODLAND PARK, CO 80866-0010
PO BOX 11, WOODLAND PARK, CO 80866-0011
PO BOX 12, WOODLAND PARK, CO 80866-0012
PO BOX 13, WOODLAND PARK, CO 80866-0013
PO BOX 14, WOODLAND PARK, CO 80866-0014
PO BOX 15, WOODLAND PARK, CO 80866-0015
PO BOX 16, WOODLAND PARK, CO 80866-0016
PO BOX 17, WOODLAND PARK, CO 80866-0017
PO BOX 18, WOODLAND PARK, CO 80866-0018
PO BOX 19, WOODLAND PARK, CO 80866-0019
PO BOX 20, WOODLAND PARK, CO 80866-0020
PO BOX 21, WOODLAND PARK, CO 80866-0021
PO BOX 22, WOODLAND PARK, CO 80866-0022
PO BOX 23, WOODLAND PARK, CO 80866-0023
PO BOX 24, WOODLAND PARK, CO 80866-0024
PO BOX 25, WOODLAND PARK, CO 80866-0025
PO BOX 26, WOODLAND PARK, CO 80866-0026
PO BOX 27, WOODLAND PARK, CO 80866-0027
PO BOX 28, WOODLAND PARK, CO 80866-0028
PO BOX 29, WOODLAND PARK, CO 80866-0029
PO BOX 30, WOODLAND PARK, CO 80866-0030
PO BOX 31, WOODLAND PARK, CO 80866-0031
PO BOX 32, WOODLAND PARK, CO 80866-0032
PO BOX 33, WOODLAND PARK, CO 80866-0033
PO BOX 34, WOODLAND PARK, CO 80866-0034
PO BOX 35, WOODLAND PARK, CO 80866-0035
PO BOX 36, WOODLAND PARK, CO 80866-0036
PO BOX 37, WOODLAND PARK, CO 80866-0037
PO BOX 38, WOODLAND PARK, CO 80866-0038
PO BOX 39, WOODLAND PARK, CO 80866-0039
PO BOX 40, WOODLAND PARK, CO 80866-0040
PO BOX 41, WOODLAND PARK, CO 80866-0041
PO BOX 42, WOODLAND PARK, CO 80866-0042
PO BOX 43, WOODLAND PARK, CO 80866-0043
PO BOX 44, WOODLAND PARK, CO 80866-0044
PO BOX 45, WOODLAND PARK, CO 80866-0045
PO BOX 46, WOODLAND PARK, CO 80866-0046
PO BOX 47, WOODLAND PARK, CO 80866-0047
PO BOX 48, WOODLAND PARK, CO 80866-0048
PO BOX 49, WOODLAND PARK, CO 80866-0049
PO BOX 50, WOODLAND PARK, CO 80866-0050
PO BOX 51, WOODLAND PARK, CO 80866-0051
PO BOX 52, WOODLAND PARK, CO 80866-0052
PO BOX 53, WOODLAND PARK, CO 80866-0053
PO BOX 54, WOODLAND PARK, CO 80866-0054
PO BOX 55, WOODLAND PARK, CO 80866-0055
PO BOX 56, WOODLAND PARK, CO 80866-0056
PO BOX 57, WOODLAND PARK, CO 80866-0057
PO BOX 58, WOODLAND PARK, CO 80866-0058
PO BOX 59, WOODLAND PARK, CO 80866-0059
PO BOX 60, WOODLAND PARK, CO 80866-0060
PO BOX 61, WOODLAND PARK, CO 80866-0061
PO BOX 62, WOODLAND PARK, CO 80866-0062
PO BOX 63, WOODLAND PARK, CO 80866-0063
PO BOX 64, WOODLAND PARK, CO 80866-0064
PO BOX 65, WOODLAND PARK, CO 80866-0065
PO BOX 66, WOODLAND PARK, CO 80866-0066
PO BOX 67, WOODLAND PARK, CO 80866-0067
PO BOX 68, WOODLAND PARK, CO 80866-0068
PO BOX 69, WOODLAND PARK, CO 80866-0069
PO BOX 70, WOODLAND PARK, CO 80866-0070
PO BOX 71, WOODLAND PARK, CO 80866-0071
PO BOX 72, WOODLAND PARK, CO 80866-0072
PO BOX 73, WOODLAND PARK, CO 80866-0073
PO BOX 74, WOODLAND PARK, CO 80866-0074
PO BOX 75, WOODLAND PARK, CO 80866-0075
PO BOX 76, WOODLAND PARK, CO 80866-0076
PO BOX 77, WOODLAND PARK, CO 80866-0077
PO BOX 78, WOODLAND PARK, CO 80866-0078
PO BOX 79, WOODLAND PARK, CO 80866-0079
PO BOX 80, WOODLAND PARK, CO 80866-0080
PO BOX 81, WOODLAND PARK, CO 80866-0081
PO BOX 82, WOODLAND PARK, CO 80866-0082
PO BOX 83, WOODLAND PARK, CO 80866-0083
PO BOX 84, WOODLAND PARK, CO 80866-0084
PO BOX 85, WOODLAND PARK, CO 80866-0085
PO BOX 86, WOODLAND PARK, CO 80866-0086
PO BOX 87, WOODLAND PARK, CO 80866-0087
PO BOX 88, WOODLAND PARK, CO 80866-0088
PO BOX 89, WOODLAND PARK, CO 80866-0089
PO BOX 90, WOODLAND PARK, CO 80866-0090
PO BOX 91, WOODLAND PARK, CO 80866-0091
PO BOX 92, WOODLAND PARK, CO 80866-0092
PO BOX 93, WOODLAND PARK, CO 80866-0093
PO BOX 94, WOODLAND PARK, CO 80866-0094
PO BOX 95, WOODLAND PARK, CO 80866-0095
PO BOX 96, WOODLAND PARK, CO 80866-0096
PO BOX 97, WOODLAND PARK, CO 80866-0097
PO BOX 98, WOODLAND PARK, CO 80866-0098
PO BOX 99, WOODLAND PARK, CO 80866-0099
PO BOX 100, WOODLAND PARK, CO 80866-0100
PO BOX 101, WOODLAND PARK, CO 80866-0101
PO BOX 102, WOODLAND PARK, CO 80866-0102
PO BOX 103, WOODLAND PARK, CO 80866-0103
PO BOX 104, WOODLAND PARK, CO 80866-0104
PO BOX 105, WOODLAND PARK, CO 80866-0105
PO BOX 106, WOODLAND PARK, CO 80866-0106
PO BOX 107, WOODLAND PARK, CO 80866-0107
PO BOX 108, WOODLAND PARK, CO 80866-0108
PO BOX 109, WOODLAND PARK, CO 80866-0109
PO BOX 110, WOODLAND PARK, CO 80866-0110
PO BOX 111, WOODLAND PARK, CO 80866-0111
PO BOX 112, WOODLAND PARK, CO 80866-0112
PO BOX 113, WOODLAND PARK, CO 80866-0113
PO BOX 114, WOODLAND PARK, CO 80866-0114
PO BOX 115, WOODLAND PARK, CO 80866-0115
PO BOX 116, WOODLAND PARK, CO 80866-0116
PO BOX 117, WOODLAND PARK, CO 80866-0117
PO BOX 118, WOODLAND PARK, CO 80866-0118
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