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, FALLBROOK, CA 92088-0001
PO BOX 2, FALLBROOK, CA 92088-0002
PO BOX 3, FALLBROOK, CA 92088-0003
PO BOX 4, FALLBROOK, CA 92088-0004
PO BOX 5, FALLBROOK, CA 92088-0005
PO BOX 6, FALLBROOK, CA 92088-0006
PO BOX 7, FALLBROOK, CA 92088-0007
PO BOX 8, FALLBROOK, CA 92088-0008
PO BOX 9, FALLBROOK, CA 92088-0009
PO BOX 10, FALLBROOK, CA 92088-0010
PO BOX 11, FALLBROOK, CA 92088-0011
PO BOX 12, FALLBROOK, CA 92088-0012
PO BOX 13, FALLBROOK, CA 92088-0013
PO BOX 14, FALLBROOK, CA 92088-0014
PO BOX 15, FALLBROOK, CA 92088-0015
PO BOX 16, FALLBROOK, CA 92088-0016
PO BOX 17, FALLBROOK, CA 92088-0017
PO BOX 18, FALLBROOK, CA 92088-0018
PO BOX 19, FALLBROOK, CA 92088-0019
PO BOX 20, FALLBROOK, CA 92088-0020
PO BOX 21, FALLBROOK, CA 92088-0021
PO BOX 22, FALLBROOK, CA 92088-0022
PO BOX 23, FALLBROOK, CA 92088-0023
PO BOX 24, FALLBROOK, CA 92088-0024
PO BOX 25, FALLBROOK, CA 92088-0025
PO BOX 26, FALLBROOK, CA 92088-0026
PO BOX 27, FALLBROOK, CA 92088-0027
PO BOX 28, FALLBROOK, CA 92088-0028
PO BOX 29, FALLBROOK, CA 92088-0029
PO BOX 30, FALLBROOK, CA 92088-0030
PO BOX 31, FALLBROOK, CA 92088-0031
PO BOX 32, FALLBROOK, CA 92088-0032
PO BOX 33, FALLBROOK, CA 92088-0033
PO BOX 34, FALLBROOK, CA 92088-0034
PO BOX 35, FALLBROOK, CA 92088-0035
PO BOX 36, FALLBROOK, CA 92088-0036
PO BOX 37, FALLBROOK, CA 92088-0037
PO BOX 38, FALLBROOK, CA 92088-0038
PO BOX 39, FALLBROOK, CA 92088-0039
PO BOX 40, FALLBROOK, CA 92088-0040
PO BOX 41, FALLBROOK, CA 92088-0041
PO BOX 42, FALLBROOK, CA 92088-0042
PO BOX 43, FALLBROOK, CA 92088-0043
PO BOX 44, FALLBROOK, CA 92088-0044
PO BOX 45, FALLBROOK, CA 92088-0045
PO BOX 46, FALLBROOK, CA 92088-0046
PO BOX 47, FALLBROOK, CA 92088-0047
PO BOX 48, FALLBROOK, CA 92088-0048
PO BOX 49, FALLBROOK, CA 92088-0049
PO BOX 50, FALLBROOK, CA 92088-0050
PO BOX 51, FALLBROOK, CA 92088-0051
PO BOX 52, FALLBROOK, CA 92088-0052
PO BOX 53, FALLBROOK, CA 92088-0053
PO BOX 54, FALLBROOK, CA 92088-0054
PO BOX 55, FALLBROOK, CA 92088-0055
PO BOX 56, FALLBROOK, CA 92088-0056
PO BOX 57, FALLBROOK, CA 92088-0057
PO BOX 58, FALLBROOK, CA 92088-0058
PO BOX 59, FALLBROOK, CA 92088-0059
PO BOX 60, FALLBROOK, CA 92088-0060
PO BOX 61, FALLBROOK, CA 92088-0061
PO BOX 62, FALLBROOK, CA 92088-0062
PO BOX 63, FALLBROOK, CA 92088-0063
PO BOX 64, FALLBROOK, CA 92088-0064
PO BOX 65, FALLBROOK, CA 92088-0065
PO BOX 66, FALLBROOK, CA 92088-0066
PO BOX 67, FALLBROOK, CA 92088-0067
PO BOX 68, FALLBROOK, CA 92088-0068
PO BOX 69, FALLBROOK, CA 92088-0069
PO BOX 70, FALLBROOK, CA 92088-0070
PO BOX 71, FALLBROOK, CA 92088-0071
PO BOX 72, FALLBROOK, CA 92088-0072
PO BOX 73, FALLBROOK, CA 92088-0073
PO BOX 74, FALLBROOK, CA 92088-0074
PO BOX 75, FALLBROOK, CA 92088-0075
PO BOX 76, FALLBROOK, CA 92088-0076
PO BOX 77, FALLBROOK, CA 92088-0077
PO BOX 78, FALLBROOK, CA 92088-0078
PO BOX 79, FALLBROOK, CA 92088-0079
PO BOX 80, FALLBROOK, CA 92088-0080
PO BOX 81, FALLBROOK, CA 92088-0081
PO BOX 82, FALLBROOK, CA 92088-0082
PO BOX 83, FALLBROOK, CA 92088-0083
PO BOX 84, FALLBROOK, CA 92088-0084
PO BOX 85, FALLBROOK, CA 92088-0085
PO BOX 86, FALLBROOK, CA 92088-0086
PO BOX 87, FALLBROOK, CA 92088-0087
PO BOX 88, FALLBROOK, CA 92088-0088
PO BOX 89, FALLBROOK, CA 92088-0089
PO BOX 90, FALLBROOK, CA 92088-0090
PO BOX 91, FALLBROOK, CA 92088-0091
PO BOX 92, FALLBROOK, CA 92088-0092
PO BOX 93, FALLBROOK, CA 92088-0093
PO BOX 94, FALLBROOK, CA 92088-0094
PO BOX 95, FALLBROOK, CA 92088-0095
PO BOX 96, FALLBROOK, CA 92088-0096
PO BOX 97, FALLBROOK, CA 92088-0097
PO BOX 98, FALLBROOK, CA 92088-0098
PO BOX 99, FALLBROOK, CA 92088-0099
PO BOX 100, FALLBROOK, CA 92088-0100
PO BOX 101, FALLBROOK, CA 92088-0101
PO BOX 102, FALLBROOK, CA 92088-0102
PO BOX 103, FALLBROOK, CA 92088-0103
PO BOX 104, FALLBROOK, CA 92088-0104
PO BOX 105, FALLBROOK, CA 92088-0105
PO BOX 106, FALLBROOK, CA 92088-0106
PO BOX 107, FALLBROOK, CA 92088-0107
PO BOX 108, FALLBROOK, CA 92088-0108
PO BOX 109, FALLBROOK, CA 92088-0109
PO BOX 110, FALLBROOK, CA 92088-0110
PO BOX 111, FALLBROOK, CA 92088-0111
PO BOX 112, FALLBROOK, CA 92088-0112
PO BOX 113, FALLBROOK, CA 92088-0113
PO BOX 114, FALLBROOK, CA 92088-0114
PO BOX 115, FALLBROOK, CA 92088-0115
PO BOX 116, FALLBROOK, CA 92088-0116
PO BOX 117, FALLBROOK, CA 92088-0117
PO BOX 118, FALLBROOK, CA 92088-0118
PO BOX 119, FALLBROOK, CA 92088-0119
PO BOX 120, FALLBROOK, CA 92088-0120
PO BOX 121, FALLBROOK, CA 92088-0121
PO BOX 122, FALLBROOK, CA 92088-0122
PO BOX 123, FALLBROOK, CA 92088-0123
PO BOX 124, FALLBROOK, CA 92088-0124
PO BOX 125, FALLBROOK, CA 92088-0125
PO BOX 126, FALLBROOK, CA 92088-0126
PO BOX 127, FALLBROOK, CA 92088-0127
PO BOX 128, FALLBROOK, CA 92088-0128
PO BOX 129, FALLBROOK, CA 92088-0129
PO BOX 130, FALLBROOK, CA 92088-0130
PO BOX 131, FALLBROOK, CA 92088-0131
PO BOX 132, FALLBROOK, CA 92088-0132
PO BOX 133, FALLBROOK, CA 92088-0133
PO BOX 134, FALLBROOK, CA 92088-0134
PO BOX 135, FALLBROOK, CA 92088-0135
PO BOX 136, FALLBROOK, CA 92088-0136
PO BOX 137, FALLBROOK, CA 92088-0137
PO BOX 138, FALLBROOK, CA 92088-0138
PO BOX 139, FALLBROOK, CA 92088-0139
PO BOX 140, FALLBROOK, CA 92088-0140
PO BOX 141, FALLBROOK, CA 92088-0141
PO BOX 142, FALLBROOK, CA 92088-0142
PO BOX 143, FALLBROOK, CA 92088-0143
PO BOX 144, FALLBROOK, CA 92088-0144
PO BOX 145, FALLBROOK, CA 92088-0145
PO BOX 146, FALLBROOK, CA 92088-0146
PO BOX 147, FALLBROOK, CA 92088-0147
PO BOX 148, FALLBROOK, CA 92088-0148
PO BOX 149, FALLBROOK, CA 92088-0149
PO BOX 150, FALLBROOK, CA 92088-0150
PO BOX 151, FALLBROOK, CA 92088-0151
PO BOX 152, FALLBROOK, CA 92088-0152
PO BOX 153, FALLBROOK, CA 92088-0153
PO BOX 154, FALLBROOK, CA 92088-0154
PO BOX 155, FALLBROOK, CA 92088-0155
PO BOX 156, FALLBROOK, CA 92088-0156
PO BOX 157, FALLBROOK, CA 92088-0157
PO BOX 158, FALLBROOK, CA 92088-0158
PO BOX 159, FALLBROOK, CA 92088-0159
PO BOX 160, FALLBROOK, CA 92088-0160
PO BOX 161, FALLBROOK, CA 92088-0161
PO BOX 162, FALLBROOK, CA 92088-0162
PO BOX 163, FALLBROOK, CA 92088-0163
PO BOX 164, FALLBROOK, CA 92088-0164
PO BOX 165, FALLBROOK, CA 92088-0165
PO BOX 166, FALLBROOK, CA 92088-0166
PO BOX 167, FALLBROOK, CA 92088-0167
PO BOX 168, FALLBROOK, CA 92088-0168
PO BOX 169, FALLBROOK, CA 92088-0169
PO BOX 170, FALLBROOK, CA 92088-0170
PO BOX 171, FALLBROOK, CA 92088-0171
PO BOX 172, FALLBROOK, CA 92088-0172
PO BOX 173, FALLBROOK, CA 92088-0173
PO BOX 174, FALLBROOK, CA 92088-0174
PO BOX 175, FALLBROOK, CA 92088-0175
PO BOX 176, FALLBROOK, CA 92088-0176
PO BOX 177, FALLBROOK, CA 92088-0177
PO BOX 178, FALLBROOK, CA 92088-0178
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