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 29, LA JOLLA, CA 92038-0029
PO BOX 30, LA JOLLA, CA 92038-0030
PO BOX 31, LA JOLLA, CA 92038-0031
PO BOX 32, LA JOLLA, CA 92038-0032
PO BOX 33, LA JOLLA, CA 92038-0033
PO BOX 34, LA JOLLA, CA 92038-0034
PO BOX 35, LA JOLLA, CA 92038-0035
PO BOX 36, LA JOLLA, CA 92038-0036
PO BOX 37, LA JOLLA, CA 92038-0037
PO BOX 38, LA JOLLA, CA 92038-0038
PO BOX 39, LA JOLLA, CA 92038-0039
PO BOX 40, LA JOLLA, CA 92038-0040
PO BOX 41, LA JOLLA, CA 92038-0041
PO BOX 42, LA JOLLA, CA 92038-0042
PO BOX 43, LA JOLLA, CA 92038-0043
PO BOX 44, LA JOLLA, CA 92038-0044
PO BOX 45, LA JOLLA, CA 92038-0045
PO BOX 46, LA JOLLA, CA 92038-0046
PO BOX 47, LA JOLLA, CA 92038-0047
PO BOX 48, LA JOLLA, CA 92038-0048
PO BOX 49, LA JOLLA, CA 92038-0049
PO BOX 50, LA JOLLA, CA 92038-0050
PO BOX 51, LA JOLLA, CA 92038-0051
PO BOX 52, LA JOLLA, CA 92038-0052
PO BOX 53, LA JOLLA, CA 92038-0053
PO BOX 54, LA JOLLA, CA 92038-0054
PO BOX 55, LA JOLLA, CA 92038-0055
PO BOX 56, LA JOLLA, CA 92038-0056
PO BOX 57, LA JOLLA, CA 92038-0057
PO BOX 58, LA JOLLA, CA 92038-0058
PO BOX 59, LA JOLLA, CA 92038-0059
PO BOX 60, LA JOLLA, CA 92038-0060
PO BOX 61, LA JOLLA, CA 92038-0061
PO BOX 62, LA JOLLA, CA 92038-0062
PO BOX 63, LA JOLLA, CA 92038-0063
PO BOX 64, LA JOLLA, CA 92038-0064
PO BOX 65, LA JOLLA, CA 92038-0065
PO BOX 66, LA JOLLA, CA 92038-0066
PO BOX 67, LA JOLLA, CA 92038-0067
PO BOX 68, LA JOLLA, CA 92038-0068
PO BOX 69, LA JOLLA, CA 92038-0069
PO BOX 70, LA JOLLA, CA 92038-0070
PO BOX 71, LA JOLLA, CA 92038-0071
PO BOX 72, LA JOLLA, CA 92038-0072
PO BOX 73, LA JOLLA, CA 92038-0073
PO BOX 74, LA JOLLA, CA 92038-0074
PO BOX 75, LA JOLLA, CA 92038-0075
PO BOX 76, LA JOLLA, CA 92038-0076
PO BOX 77, LA JOLLA, CA 92038-0077
PO BOX 78, LA JOLLA, CA 92038-0078
PO BOX 79, LA JOLLA, CA 92038-0079
PO BOX 80, LA JOLLA, CA 92038-0080
PO BOX 81, LA JOLLA, CA 92038-0081
PO BOX 82, LA JOLLA, CA 92038-0082
PO BOX 83, LA JOLLA, CA 92038-0083
PO BOX 84, LA JOLLA, CA 92038-0084
PO BOX 85, LA JOLLA, CA 92038-0085
PO BOX 86, LA JOLLA, CA 92038-0086
PO BOX 87, LA JOLLA, CA 92038-0087
PO BOX 88, LA JOLLA, CA 92038-0088
PO BOX 89, LA JOLLA, CA 92038-0089
PO BOX 90, LA JOLLA, CA 92038-0090
PO BOX 91, LA JOLLA, CA 92038-0091
PO BOX 92, LA JOLLA, CA 92038-0092
PO BOX 93, LA JOLLA, CA 92038-0093
PO BOX 94, LA JOLLA, CA 92038-0094
PO BOX 95, LA JOLLA, CA 92038-0095
PO BOX 96, LA JOLLA, CA 92038-0096
PO BOX 97, LA JOLLA, CA 92038-0097
PO BOX 98, LA JOLLA, CA 92038-0098
PO BOX 99, LA JOLLA, CA 92038-0099
PO BOX 100, LA JOLLA, CA 92038-0100
PO BOX 101, LA JOLLA, CA 92038-0101
PO BOX 102, LA JOLLA, CA 92038-0102
PO BOX 103, LA JOLLA, CA 92038-0103
PO BOX 104, LA JOLLA, CA 92038-0104
PO BOX 105, LA JOLLA, CA 92038-0105
PO BOX 106, LA JOLLA, CA 92038-0106
PO BOX 107, LA JOLLA, CA 92038-0107
PO BOX 108, LA JOLLA, CA 92038-0108
PO BOX 109, LA JOLLA, CA 92038-0109
PO BOX 110, LA JOLLA, CA 92038-0110
PO BOX 111, LA JOLLA, CA 92038-0111
PO BOX 112, LA JOLLA, CA 92038-0112
PO BOX 113, LA JOLLA, CA 92038-0113
PO BOX 114, LA JOLLA, CA 92038-0114
PO BOX 115, LA JOLLA, CA 92038-0115
PO BOX 116, LA JOLLA, CA 92038-0116
PO BOX 117, LA JOLLA, CA 92038-0117
PO BOX 118, LA JOLLA, CA 92038-0118
PO BOX 119, LA JOLLA, CA 92038-0119
PO BOX 120, LA JOLLA, CA 92038-0120
PO BOX 121, LA JOLLA, CA 92038-0121
PO BOX 122, LA JOLLA, CA 92038-0122
PO BOX 123, LA JOLLA, CA 92038-0123
PO BOX 124, LA JOLLA, CA 92038-0124
PO BOX 125, LA JOLLA, CA 92038-0125
PO BOX 126, LA JOLLA, CA 92038-0126
PO BOX 127, LA JOLLA, CA 92038-0127
PO BOX 128, LA JOLLA, CA 92038-0128
PO BOX 129, LA JOLLA, CA 92038-0129
PO BOX 130, LA JOLLA, CA 92038-0130
PO BOX 131, LA JOLLA, CA 92038-0131
PO BOX 132, LA JOLLA, CA 92038-0132
PO BOX 133, LA JOLLA, CA 92038-0133
PO BOX 134, LA JOLLA, CA 92038-0134
PO BOX 135, LA JOLLA, CA 92038-0135
PO BOX 136, LA JOLLA, CA 92038-0136
PO BOX 137, LA JOLLA, CA 92038-0137
PO BOX 138, LA JOLLA, CA 92038-0138
PO BOX 139, LA JOLLA, CA 92038-0139
PO BOX 140, LA JOLLA, CA 92038-0140
PO BOX 141, LA JOLLA, CA 92038-0141
PO BOX 142, LA JOLLA, CA 92038-0142
PO BOX 143, LA JOLLA, CA 92038-0143
PO BOX 144, LA JOLLA, CA 92038-0144
PO BOX 145, LA JOLLA, CA 92038-0145
PO BOX 146, LA JOLLA, CA 92038-0146
PO BOX 147, LA JOLLA, CA 92038-0147
PO BOX 148, LA JOLLA, CA 92038-0148
PO BOX 149, LA JOLLA, CA 92038-0149
PO BOX 150, LA JOLLA, CA 92038-0150
PO BOX 151, LA JOLLA, CA 92038-0151
PO BOX 152, LA JOLLA, CA 92038-0152
PO BOX 153, LA JOLLA, CA 92038-0153
PO BOX 154, LA JOLLA, CA 92038-0154
PO BOX 155, LA JOLLA, CA 92038-0155
PO BOX 156, LA JOLLA, CA 92038-0156
PO BOX 157, LA JOLLA, CA 92038-0157
PO BOX 158, LA JOLLA, CA 92038-0158
PO BOX 159, LA JOLLA, CA 92038-0159
PO BOX 160, LA JOLLA, CA 92038-0160
PO BOX 161, LA JOLLA, CA 92038-0161
PO BOX 162, LA JOLLA, CA 92038-0162
PO BOX 163, LA JOLLA, CA 92038-0163
PO BOX 164, LA JOLLA, CA 92038-0164
PO BOX 165, LA JOLLA, CA 92038-0165
PO BOX 166, LA JOLLA, CA 92038-0166
PO BOX 167, LA JOLLA, CA 92038-0167
PO BOX 168, LA JOLLA, CA 92038-0168
PO BOX 169, LA JOLLA, CA 92038-0169
PO BOX 170, LA JOLLA, CA 92038-0170
PO BOX 171, LA JOLLA, CA 92038-0171
PO BOX 172, LA JOLLA, CA 92038-0172
PO BOX 173, LA JOLLA, CA 92038-0173
PO BOX 174, LA JOLLA, CA 92038-0174
PO BOX 175, LA JOLLA, CA 92038-0175
PO BOX 176, LA JOLLA, CA 92038-0176
PO BOX 177, LA JOLLA, CA 92038-0177
PO BOX 178, LA JOLLA, CA 92038-0178
PO BOX 179, LA JOLLA, CA 92038-0179
PO BOX 180, LA JOLLA, CA 92038-0180
PO BOX 181, LA JOLLA, CA 92038-0181
PO BOX 182, LA JOLLA, CA 92038-0182
PO BOX 183, LA JOLLA, CA 92038-0183
PO BOX 184, LA JOLLA, CA 92038-0184
PO BOX 185, LA JOLLA, CA 92038-0185
PO BOX 186, LA JOLLA, CA 92038-0186
PO BOX 187, LA JOLLA, CA 92038-0187
PO BOX 188, LA JOLLA, CA 92038-0188
PO BOX 189, LA JOLLA, CA 92038-0189
PO BOX 190, LA JOLLA, CA 92038-0190
PO BOX 191, LA JOLLA, CA 92038-0191
PO BOX 192, LA JOLLA, CA 92038-0192
PO BOX 193, LA JOLLA, CA 92038-0193
PO BOX 194, LA JOLLA, CA 92038-0194
PO BOX 195, LA JOLLA, CA 92038-0195
PO BOX 196, LA JOLLA, CA 92038-0196
PO BOX 197, LA JOLLA, CA 92038-0197
PO BOX 198, LA JOLLA, CA 92038-0198
PO BOX 199, LA JOLLA, CA 92038-0199
PO BOX 200, LA JOLLA, CA 92038-0200
PO BOX 201, LA JOLLA, CA 92038-0201
PO BOX 202, LA JOLLA, CA 92038-0202
PO BOX 203, LA JOLLA, CA 92038-0203
PO BOX 204, LA JOLLA, CA 92038-0204
PO BOX 205, LA JOLLA, CA 92038-0205
PO BOX 206, LA JOLLA, CA 92038-0206
PO BOX 207, LA JOLLA, CA 92038-0207
PO BOX 208, LA JOLLA, CA 92038-0208
PO BOX 209, LA JOLLA, CA 92038-0209
PO BOX 210, LA JOLLA, CA 92038-0210
PO BOX 211, LA JOLLA, CA 92038-0211
PO BOX 212, LA JOLLA, CA 92038-0212
PO BOX 213, LA JOLLA, CA 92038-0213
PO BOX 214, LA JOLLA, CA 92038-0214
PO BOX 215, LA JOLLA, CA 92038-0215
PO BOX 216, LA JOLLA, CA 92038-0216
PO BOX 217, LA JOLLA, CA 92038-0217
PO BOX 218, LA JOLLA, CA 92038-0218
PO BOX 219, LA JOLLA, CA 92038-0219
PO BOX 220, LA JOLLA, CA 92038-0220
PO BOX 221, LA JOLLA, CA 92038-0221
PO BOX 222, LA JOLLA, CA 92038-0222
PO BOX 223, LA JOLLA, CA 92038-0223
PO BOX 224, LA JOLLA, CA 92038-0224
PO BOX 225, LA JOLLA, CA 92038-0225
PO BOX 226, LA JOLLA, CA 92038-0226
PO BOX 227, LA JOLLA, CA 92038-0227
PO BOX 228, LA JOLLA, CA 92038-0228
PO BOX 229, LA JOLLA, CA 92038-0229
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