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, NICOLAUS, CA 95659-0001
PO BOX 2, NICOLAUS, CA 95659-0002
PO BOX 3, NICOLAUS, CA 95659-0003
PO BOX 4, NICOLAUS, CA 95659-0004
PO BOX 5, NICOLAUS, CA 95659-0005
PO BOX 6, NICOLAUS, CA 95659-0006
PO BOX 7, NICOLAUS, CA 95659-0007
PO BOX 8, NICOLAUS, CA 95659-0008
PO BOX 9, NICOLAUS, CA 95659-0009
PO BOX 10, NICOLAUS, CA 95659-0010
PO BOX 11, NICOLAUS, CA 95659-0011
PO BOX 12, NICOLAUS, CA 95659-0012
PO BOX 13, NICOLAUS, CA 95659-0013
PO BOX 14, NICOLAUS, CA 95659-0014
PO BOX 15, NICOLAUS, CA 95659-0015
PO BOX 16, NICOLAUS, CA 95659-0016
PO BOX 17, NICOLAUS, CA 95659-0017
PO BOX 18, NICOLAUS, CA 95659-0018
PO BOX 19, NICOLAUS, CA 95659-0019
PO BOX 20, NICOLAUS, CA 95659-0020
PO BOX 21, NICOLAUS, CA 95659-0021
PO BOX 22, NICOLAUS, CA 95659-0022
PO BOX 23, NICOLAUS, CA 95659-0023
PO BOX 24, NICOLAUS, CA 95659-0024
PO BOX 25, NICOLAUS, CA 95659-0025
PO BOX 26, NICOLAUS, CA 95659-0026
PO BOX 27, NICOLAUS, CA 95659-0027
PO BOX 28, NICOLAUS, CA 95659-0028
PO BOX 29, NICOLAUS, CA 95659-0029
PO BOX 30, NICOLAUS, CA 95659-0030
PO BOX 31, NICOLAUS, CA 95659-0031
PO BOX 32, NICOLAUS, CA 95659-0032
PO BOX 33, NICOLAUS, CA 95659-0033
PO BOX 34, NICOLAUS, CA 95659-0034
PO BOX 35, NICOLAUS, CA 95659-0035
PO BOX 36, NICOLAUS, CA 95659-0036
PO BOX 37, NICOLAUS, CA 95659-0037
PO BOX 38, NICOLAUS, CA 95659-0038
PO BOX 39, NICOLAUS, CA 95659-0039
PO BOX 40, NICOLAUS, CA 95659-0040
PO BOX 41, NICOLAUS, CA 95659-0041
PO BOX 42, NICOLAUS, CA 95659-0042
PO BOX 43, NICOLAUS, CA 95659-0043
PO BOX 44, NICOLAUS, CA 95659-0044
PO BOX 45, NICOLAUS, CA 95659-0045
PO BOX 46, NICOLAUS, CA 95659-0046
PO BOX 47, NICOLAUS, CA 95659-0047
PO BOX 48, NICOLAUS, CA 95659-0048
PO BOX 49, NICOLAUS, CA 95659-0049
PO BOX 50, NICOLAUS, CA 95659-0050
PO BOX 51, NICOLAUS, CA 95659-0051
PO BOX 52, NICOLAUS, CA 95659-0052
PO BOX 53, NICOLAUS, CA 95659-0053
PO BOX 54, NICOLAUS, CA 95659-0054
PO BOX 55, NICOLAUS, CA 95659-0055
PO BOX 56, NICOLAUS, CA 95659-0056
PO BOX 57, NICOLAUS, CA 95659-0057
PO BOX 58, NICOLAUS, CA 95659-0058
PO BOX 59, NICOLAUS, CA 95659-0059
PO BOX 60, NICOLAUS, CA 95659-0060
PO BOX 61, NICOLAUS, CA 95659-0061
PO BOX 62, NICOLAUS, CA 95659-0062
PO BOX 63, NICOLAUS, CA 95659-0063
PO BOX 64, NICOLAUS, CA 95659-0064
PO BOX 65, NICOLAUS, CA 95659-0065
PO BOX 66, NICOLAUS, CA 95659-0066
PO BOX 67, NICOLAUS, CA 95659-0067
PO BOX 68, NICOLAUS, CA 95659-0068
PO BOX 69, NICOLAUS, CA 95659-0069
PO BOX 70, NICOLAUS, CA 95659-0070
PO BOX 71, NICOLAUS, CA 95659-0071
PO BOX 72, NICOLAUS, CA 95659-0072
PO BOX 73, NICOLAUS, CA 95659-0073
PO BOX 74, NICOLAUS, CA 95659-0074
PO BOX 75, NICOLAUS, CA 95659-0075
PO BOX 76, NICOLAUS, CA 95659-0076
PO BOX 77, NICOLAUS, CA 95659-0077
PO BOX 78, NICOLAUS, CA 95659-0078
PO BOX 79, NICOLAUS, CA 95659-0079
PO BOX 80, NICOLAUS, CA 95659-0080
PO BOX 81, NICOLAUS, CA 95659-0081
PO BOX 82, NICOLAUS, CA 95659-0082
PO BOX 83, NICOLAUS, CA 95659-0083
PO BOX 84, NICOLAUS, CA 95659-0084
PO BOX 85, NICOLAUS, CA 95659-0085
PO BOX 86, NICOLAUS, CA 95659-0086
PO BOX 87, NICOLAUS, CA 95659-0087
PO BOX 88, NICOLAUS, CA 95659-0088
PO BOX 89, NICOLAUS, CA 95659-0089
PO BOX 90, NICOLAUS, CA 95659-0090
PO BOX 91, NICOLAUS, CA 95659-0091
PO BOX 92, NICOLAUS, CA 95659-0092
PO BOX 93, NICOLAUS, CA 95659-0093
PO BOX 94, NICOLAUS, CA 95659-0094
PO BOX 95, NICOLAUS, CA 95659-0095
PO BOX 96, NICOLAUS, CA 95659-0096
PO BOX 97, NICOLAUS, CA 95659-0097
PO BOX 98, NICOLAUS, CA 95659-0098
PO BOX 99, NICOLAUS, CA 95659-0099
PO BOX 100, NICOLAUS, CA 95659-0100
PO BOX 101, NICOLAUS, CA 95659-0101
PO BOX 102, NICOLAUS, CA 95659-0102
PO BOX 103, NICOLAUS, CA 95659-0103
PO BOX 104, NICOLAUS, CA 95659-0104
PO BOX 105, NICOLAUS, CA 95659-0105
PO BOX 106, NICOLAUS, CA 95659-0106
PO BOX 107, NICOLAUS, CA 95659-0107
PO BOX 108, NICOLAUS, CA 95659-0108
PO BOX 109, NICOLAUS, CA 95659-0109
PO BOX 110, NICOLAUS, CA 95659-0110
PO BOX 111, NICOLAUS, CA 95659-0111
PO BOX 112, NICOLAUS, CA 95659-0112
PO BOX 113, NICOLAUS, CA 95659-0113
PO BOX 114, NICOLAUS, CA 95659-0114
PO BOX 115, NICOLAUS, CA 95659-0115
PO BOX 116, NICOLAUS, CA 95659-0116
PO BOX 117, NICOLAUS, CA 95659-0117
PO BOX 118, NICOLAUS, CA 95659-0118
PO BOX 119, NICOLAUS, CA 95659-0119
PO BOX 120, NICOLAUS, CA 95659-0120
PO BOX 121, NICOLAUS, CA 95659-0121
PO BOX 122, NICOLAUS, CA 95659-0122
PO BOX 123, NICOLAUS, CA 95659-0123
PO BOX 124, NICOLAUS, CA 95659-0124
PO BOX 125, NICOLAUS, CA 95659-0125
PO BOX 126, NICOLAUS, CA 95659-0126
PO BOX 127, NICOLAUS, CA 95659-0127
PO BOX 128, NICOLAUS, CA 95659-0128
PO BOX 129, NICOLAUS, CA 95659-0129
PO BOX 130, NICOLAUS, CA 95659-0130
PO BOX 131, NICOLAUS, CA 95659-0131
PO BOX 132, NICOLAUS, CA 95659-0132
PO BOX 133, NICOLAUS, CA 95659-0133
PO BOX 134, NICOLAUS, CA 95659-0134
PO BOX 135, NICOLAUS, CA 95659-0135
PO BOX 136, NICOLAUS, CA 95659-0136
PO BOX 137, NICOLAUS, CA 95659-0137
PO BOX 138, NICOLAUS, CA 95659-0138
PO BOX 139, NICOLAUS, CA 95659-0139
PO BOX 140, NICOLAUS, CA 95659-0140
PO BOX 141, NICOLAUS, CA 95659-0141
PO BOX 142, NICOLAUS, CA 95659-0142
PO BOX 143, NICOLAUS, CA 95659-0143
PO BOX 144, NICOLAUS, CA 95659-0144
PO BOX 145, NICOLAUS, CA 95659-0145
PO BOX 146, NICOLAUS, CA 95659-0146
PO BOX 147, NICOLAUS, CA 95659-0147
PO BOX 148, NICOLAUS, CA 95659-0148
PO BOX 149, NICOLAUS, CA 95659-0149
PO BOX 150, NICOLAUS, CA 95659-0150
PO BOX 151, NICOLAUS, CA 95659-0151
PO BOX 152, NICOLAUS, CA 95659-0152
PO BOX 153, NICOLAUS, CA 95659-0153
PO BOX 154, NICOLAUS, CA 95659-0154
PO BOX 155, NICOLAUS, CA 95659-0155
PO BOX 156, NICOLAUS, CA 95659-0156
PO BOX 157, NICOLAUS, CA 95659-0157
PO BOX 158, NICOLAUS, CA 95659-0158
PO BOX 159, NICOLAUS, CA 95659-0159
PO BOX 160, NICOLAUS, CA 95659-0160
PO BOX 161, NICOLAUS, CA 95659-0161
PO BOX 162, NICOLAUS, CA 95659-0162
PO BOX 163, NICOLAUS, CA 95659-0163
PO BOX 164, NICOLAUS, CA 95659-0164
PO BOX 165, NICOLAUS, CA 95659-0165
PO BOX 166, NICOLAUS, CA 95659-0166
PO BOX 167, NICOLAUS, CA 95659-0167
PO BOX 168, NICOLAUS, CA 95659-0168
PO BOX 169, NICOLAUS, CA 95659-0169
PO BOX 170, NICOLAUS, CA 95659-0170
PO BOX 171, NICOLAUS, CA 95659-0171
PO BOX 172, NICOLAUS, CA 95659-0172
PO BOX 173, NICOLAUS, CA 95659-0173
PO BOX 174, NICOLAUS, CA 95659-0174
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