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, WHITE SANDS MISSILE RANGE, NM 88002-0001
PO BOX 2, WHITE SANDS MISSILE RANGE, NM 88002-0002
PO BOX 3, WHITE SANDS MISSILE RANGE, NM 88002-0003
PO BOX 4, WHITE SANDS MISSILE RANGE, NM 88002-0004
PO BOX 5, WHITE SANDS MISSILE RANGE, NM 88002-0005
PO BOX 6, WHITE SANDS MISSILE RANGE, NM 88002-0006
PO BOX 7, WHITE SANDS MISSILE RANGE, NM 88002-0007
PO BOX 8, WHITE SANDS MISSILE RANGE, NM 88002-0008
PO BOX 9, WHITE SANDS MISSILE RANGE, NM 88002-0009
PO BOX 10, WHITE SANDS MISSILE RANGE, NM 88002-0010
PO BOX 11, WHITE SANDS MISSILE RANGE, NM 88002-0011
PO BOX 12, WHITE SANDS MISSILE RANGE, NM 88002-0012
PO BOX 13, WHITE SANDS MISSILE RANGE, NM 88002-0013
PO BOX 14, WHITE SANDS MISSILE RANGE, NM 88002-0014
PO BOX 15, WHITE SANDS MISSILE RANGE, NM 88002-0015
PO BOX 16, WHITE SANDS MISSILE RANGE, NM 88002-0016
PO BOX 17, WHITE SANDS MISSILE RANGE, NM 88002-0017
PO BOX 18, WHITE SANDS MISSILE RANGE, NM 88002-0018
PO BOX 19, WHITE SANDS MISSILE RANGE, NM 88002-0019
PO BOX 20, WHITE SANDS MISSILE RANGE, NM 88002-0020
PO BOX 21, WHITE SANDS MISSILE RANGE, NM 88002-0021
PO BOX 22, WHITE SANDS MISSILE RANGE, NM 88002-0022
PO BOX 23, WHITE SANDS MISSILE RANGE, NM 88002-0023
PO BOX 24, WHITE SANDS MISSILE RANGE, NM 88002-0024
PO BOX 25, WHITE SANDS MISSILE RANGE, NM 88002-0025
PO BOX 26, WHITE SANDS MISSILE RANGE, NM 88002-0026
PO BOX 27, WHITE SANDS MISSILE RANGE, NM 88002-0027
PO BOX 28, WHITE SANDS MISSILE RANGE, NM 88002-0028
PO BOX 29, WHITE SANDS MISSILE RANGE, NM 88002-0029
PO BOX 30, WHITE SANDS MISSILE RANGE, NM 88002-0030
PO BOX 31, WHITE SANDS MISSILE RANGE, NM 88002-0031
PO BOX 32, WHITE SANDS MISSILE RANGE, NM 88002-0032
PO BOX 33, WHITE SANDS MISSILE RANGE, NM 88002-0033
PO BOX 34, WHITE SANDS MISSILE RANGE, NM 88002-0034
PO BOX 35, WHITE SANDS MISSILE RANGE, NM 88002-0035
PO BOX 36, WHITE SANDS MISSILE RANGE, NM 88002-0036
PO BOX 37, WHITE SANDS MISSILE RANGE, NM 88002-0037
PO BOX 38, WHITE SANDS MISSILE RANGE, NM 88002-0038
PO BOX 39, WHITE SANDS MISSILE RANGE, NM 88002-0039
PO BOX 40, WHITE SANDS MISSILE RANGE, NM 88002-0040
PO BOX 41, WHITE SANDS MISSILE RANGE, NM 88002-0041
PO BOX 42, WHITE SANDS MISSILE RANGE, NM 88002-0042
PO BOX 43, WHITE SANDS MISSILE RANGE, NM 88002-0043
PO BOX 44, WHITE SANDS MISSILE RANGE, NM 88002-0044
PO BOX 45, WHITE SANDS MISSILE RANGE, NM 88002-0045
PO BOX 46, WHITE SANDS MISSILE RANGE, NM 88002-0046
PO BOX 47, WHITE SANDS MISSILE RANGE, NM 88002-0047
PO BOX 48, WHITE SANDS MISSILE RANGE, NM 88002-0048
PO BOX 49, WHITE SANDS MISSILE RANGE, NM 88002-0049
PO BOX 50, WHITE SANDS MISSILE RANGE, NM 88002-0050
PO BOX 51, WHITE SANDS MISSILE RANGE, NM 88002-0051
PO BOX 52, WHITE SANDS MISSILE RANGE, NM 88002-0052
PO BOX 53, WHITE SANDS MISSILE RANGE, NM 88002-0053
PO BOX 54, WHITE SANDS MISSILE RANGE, NM 88002-0054
PO BOX 55, WHITE SANDS MISSILE RANGE, NM 88002-0055
PO BOX 56, WHITE SANDS MISSILE RANGE, NM 88002-0056
PO BOX 57, WHITE SANDS MISSILE RANGE, NM 88002-0057
PO BOX 58, WHITE SANDS MISSILE RANGE, NM 88002-0058
PO BOX 59, WHITE SANDS MISSILE RANGE, NM 88002-0059
PO BOX 60, WHITE SANDS MISSILE RANGE, NM 88002-0060
PO BOX 61, WHITE SANDS MISSILE RANGE, NM 88002-0061
PO BOX 62, WHITE SANDS MISSILE RANGE, NM 88002-0062
PO BOX 63, WHITE SANDS MISSILE RANGE, NM 88002-0063
PO BOX 64, WHITE SANDS MISSILE RANGE, NM 88002-0064
PO BOX 65, WHITE SANDS MISSILE RANGE, NM 88002-0065
PO BOX 66, WHITE SANDS MISSILE RANGE, NM 88002-0066
PO BOX 67, WHITE SANDS MISSILE RANGE, NM 88002-0067
PO BOX 68, WHITE SANDS MISSILE RANGE, NM 88002-0068
PO BOX 69, WHITE SANDS MISSILE RANGE, NM 88002-0069
PO BOX 70, WHITE SANDS MISSILE RANGE, NM 88002-0070
PO BOX 71, WHITE SANDS MISSILE RANGE, NM 88002-0071
PO BOX 72, WHITE SANDS MISSILE RANGE, NM 88002-0072
PO BOX 73, WHITE SANDS MISSILE RANGE, NM 88002-0073
PO BOX 74, WHITE SANDS MISSILE RANGE, NM 88002-0074
PO BOX 75, WHITE SANDS MISSILE RANGE, NM 88002-0075
PO BOX 76, WHITE SANDS MISSILE RANGE, NM 88002-0076
PO BOX 77, WHITE SANDS MISSILE RANGE, NM 88002-0077
PO BOX 78, WHITE SANDS MISSILE RANGE, NM 88002-0078
PO BOX 79, WHITE SANDS MISSILE RANGE, NM 88002-0079
PO BOX 80, WHITE SANDS MISSILE RANGE, NM 88002-0080
PO BOX 81, WHITE SANDS MISSILE RANGE, NM 88002-0081
PO BOX 82, WHITE SANDS MISSILE RANGE, NM 88002-0082
PO BOX 83, WHITE SANDS MISSILE RANGE, NM 88002-0083
PO BOX 84, WHITE SANDS MISSILE RANGE, NM 88002-0084
PO BOX 85, WHITE SANDS MISSILE RANGE, NM 88002-0085
PO BOX 86, WHITE SANDS MISSILE RANGE, NM 88002-0086
PO BOX 87, WHITE SANDS MISSILE RANGE, NM 88002-0087
PO BOX 88, WHITE SANDS MISSILE RANGE, NM 88002-0088
PO BOX 89, WHITE SANDS MISSILE RANGE, NM 88002-0089
PO BOX 90, WHITE SANDS MISSILE RANGE, NM 88002-0090
PO BOX 91, WHITE SANDS MISSILE RANGE, NM 88002-0091
PO BOX 92, WHITE SANDS MISSILE RANGE, NM 88002-0092
PO BOX 93, WHITE SANDS MISSILE RANGE, NM 88002-0093
PO BOX 94, WHITE SANDS MISSILE RANGE, NM 88002-0094
PO BOX 95, WHITE SANDS MISSILE RANGE, NM 88002-0095
PO BOX 96, WHITE SANDS MISSILE RANGE, NM 88002-0096
PO BOX 97, WHITE SANDS MISSILE RANGE, NM 88002-0097
PO BOX 98, WHITE SANDS MISSILE RANGE, NM 88002-0098
PO BOX 99, WHITE SANDS MISSILE RANGE, NM 88002-0099
PO BOX 100, WHITE SANDS MISSILE RANGE, NM 88002-0100
PO BOX 101, WHITE SANDS MISSILE RANGE, NM 88002-0101
PO BOX 102, WHITE SANDS MISSILE RANGE, NM 88002-0102
PO BOX 103, WHITE SANDS MISSILE RANGE, NM 88002-0103
PO BOX 104, WHITE SANDS MISSILE RANGE, NM 88002-0104
PO BOX 105, WHITE SANDS MISSILE RANGE, NM 88002-0105
PO BOX 106, WHITE SANDS MISSILE RANGE, NM 88002-0106
PO BOX 107, WHITE SANDS MISSILE RANGE, NM 88002-0107
PO BOX 108, WHITE SANDS MISSILE RANGE, NM 88002-0108
PO BOX 109, WHITE SANDS MISSILE RANGE, NM 88002-0109
PO BOX 110, WHITE SANDS MISSILE RANGE, NM 88002-0110
PO BOX 111, WHITE SANDS MISSILE RANGE, NM 88002-0111
PO BOX 112, WHITE SANDS MISSILE RANGE, NM 88002-0112
PO BOX 113, WHITE SANDS MISSILE RANGE, NM 88002-0113
PO BOX 114, WHITE SANDS MISSILE RANGE, NM 88002-0114
PO BOX 115, WHITE SANDS MISSILE RANGE, NM 88002-0115
PO BOX 116, WHITE SANDS MISSILE RANGE, NM 88002-0116
PO BOX 117, WHITE SANDS MISSILE RANGE, NM 88002-0117
PO BOX 118, WHITE SANDS MISSILE RANGE, NM 88002-0118
PO BOX 119, WHITE SANDS MISSILE RANGE, NM 88002-0119
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