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 5081, OCEANSIDE, CA 92052-5081
PO BOX 5082, OCEANSIDE, CA 92052-5082
PO BOX 5083, OCEANSIDE, CA 92052-5083
PO BOX 5084, OCEANSIDE, CA 92052-5084
PO BOX 5085, OCEANSIDE, CA 92052-5085
PO BOX 5086, OCEANSIDE, CA 92052-5086
PO BOX 5087, OCEANSIDE, CA 92052-5087
PO BOX 5088, OCEANSIDE, CA 92052-5088
PO BOX 5089, OCEANSIDE, CA 92052-5089
PO BOX 5090, OCEANSIDE, CA 92052-5090
PO BOX 5091, OCEANSIDE, CA 92052-5091
PO BOX 5092, OCEANSIDE, CA 92052-5092
PO BOX 5093, OCEANSIDE, CA 92052-5093
PO BOX 5094, OCEANSIDE, CA 92052-5094
PO BOX 5095, OCEANSIDE, CA 92052-5095
PO BOX 5096, OCEANSIDE, CA 92052-5096
PO BOX 5097, OCEANSIDE, CA 92052-5097
PO BOX 5098, OCEANSIDE, CA 92052-5098
PO BOX 5099, OCEANSIDE, CA 92052-5099
PO BOX 5100, OCEANSIDE, CA 92052-5100
PO BOX 5101, OCEANSIDE, CA 92052-5101
PO BOX 5102, OCEANSIDE, CA 92052-5102
PO BOX 5103, OCEANSIDE, CA 92052-5103
PO BOX 5104, OCEANSIDE, CA 92052-5104
PO BOX 5105, OCEANSIDE, CA 92052-5105
PO BOX 5106, OCEANSIDE, CA 92052-5106
PO BOX 5107, OCEANSIDE, CA 92052-5107
PO BOX 5108, OCEANSIDE, CA 92052-5108
PO BOX 5109, OCEANSIDE, CA 92052-5109
PO BOX 5110, OCEANSIDE, CA 92052-5110
PO BOX 5111, OCEANSIDE, CA 92052-5111
PO BOX 5112, OCEANSIDE, CA 92052-5112
PO BOX 5113, OCEANSIDE, CA 92052-5113
PO BOX 5114, OCEANSIDE, CA 92052-5114
PO BOX 5115, OCEANSIDE, CA 92052-5115
PO BOX 5116, OCEANSIDE, CA 92052-5116
PO BOX 5117, OCEANSIDE, CA 92052-5117
PO BOX 5118, OCEANSIDE, CA 92052-5118
PO BOX 5119, OCEANSIDE, CA 92052-5119
PO BOX 5120, OCEANSIDE, CA 92052-5120
PO BOX 5121, OCEANSIDE, CA 92052-5121
PO BOX 5122, OCEANSIDE, CA 92052-5122
PO BOX 5123, OCEANSIDE, CA 92052-5123
PO BOX 5124, OCEANSIDE, CA 92052-5124
PO BOX 5125, OCEANSIDE, CA 92052-5125
PO BOX 5126, OCEANSIDE, CA 92052-5126
PO BOX 5127, OCEANSIDE, CA 92052-5127
PO BOX 5128, OCEANSIDE, CA 92052-5128
PO BOX 5129, OCEANSIDE, CA 92052-5129
PO BOX 5130, OCEANSIDE, CA 92052-5130
PO BOX 5131, OCEANSIDE, CA 92052-5131
PO BOX 5132, OCEANSIDE, CA 92052-5132
PO BOX 5133, OCEANSIDE, CA 92052-5133
PO BOX 5134, OCEANSIDE, CA 92052-5134
PO BOX 5135, OCEANSIDE, CA 92052-5135
PO BOX 5136, OCEANSIDE, CA 92052-5136
PO BOX 5137, OCEANSIDE, CA 92052-5137
PO BOX 5138, OCEANSIDE, CA 92052-5138
PO BOX 5139, OCEANSIDE, CA 92052-5139
PO BOX 5140, OCEANSIDE, CA 92052-5140
PO BOX 5141, OCEANSIDE, CA 92052-5141
PO BOX 5142, OCEANSIDE, CA 92052-5142
PO BOX 5143, OCEANSIDE, CA 92052-5143
PO BOX 5144, OCEANSIDE, CA 92052-5144
PO BOX 5145, OCEANSIDE, CA 92052-5145
PO BOX 5146, OCEANSIDE, CA 92052-5146
PO BOX 5147, OCEANSIDE, CA 92052-5147
PO BOX 5148, OCEANSIDE, CA 92052-5148
PO BOX 5149, OCEANSIDE, CA 92052-5149
PO BOX 5150, OCEANSIDE, CA 92052-5150
PO BOX 5151, OCEANSIDE, CA 92052-5151
PO BOX 5152, OCEANSIDE, CA 92052-5152
PO BOX 5153, OCEANSIDE, CA 92052-5153
PO BOX 5154, OCEANSIDE, CA 92052-5154
PO BOX 5155, OCEANSIDE, CA 92052-5155
PO BOX 5156, OCEANSIDE, CA 92052-5156
PO BOX 5157, OCEANSIDE, CA 92052-5157
PO BOX 5158, OCEANSIDE, CA 92052-5158
PO BOX 5159, OCEANSIDE, CA 92052-5159
PO BOX 5160, OCEANSIDE, CA 92052-5160
PO BOX 5161, OCEANSIDE, CA 92052-5161
PO BOX 5162, OCEANSIDE, CA 92052-5162
PO BOX 5163, OCEANSIDE, CA 92052-5163
PO BOX 5164, OCEANSIDE, CA 92052-5164
PO BOX 5165, OCEANSIDE, CA 92052-5165
PO BOX 5166, OCEANSIDE, CA 92052-5166
PO BOX 5167, OCEANSIDE, CA 92052-5167
PO BOX 5168, OCEANSIDE, CA 92052-5168
PO BOX 5169, OCEANSIDE, CA 92052-5169
PO BOX 5170, OCEANSIDE, CA 92052-5170
PO BOX 5171, OCEANSIDE, CA 92052-5171
PO BOX 5172, OCEANSIDE, CA 92052-5172
PO BOX 5173, OCEANSIDE, CA 92052-5173
PO BOX 5174, OCEANSIDE, CA 92052-5174
PO BOX 5175, OCEANSIDE, CA 92052-5175
PO BOX 5176, OCEANSIDE, CA 92052-5176
PO BOX 5177, OCEANSIDE, CA 92052-5177
PO BOX 5178, OCEANSIDE, CA 92052-5178
PO BOX 5179, OCEANSIDE, CA 92052-5179
PO BOX 5180, OCEANSIDE, CA 92052-5180
PO BOX 5181, OCEANSIDE, CA 92052-5181
PO BOX 5182, OCEANSIDE, CA 92052-5182
PO BOX 5183, OCEANSIDE, CA 92052-5183
PO BOX 5184, OCEANSIDE, CA 92052-5184
PO BOX 5185, OCEANSIDE, CA 92052-5185
PO BOX 5186, OCEANSIDE, CA 92052-5186
PO BOX 5187, OCEANSIDE, CA 92052-5187
PO BOX 5188, OCEANSIDE, CA 92052-5188
PO BOX 5189, OCEANSIDE, CA 92052-5189
PO BOX 5190, OCEANSIDE, CA 92052-5190
PO BOX 5191, OCEANSIDE, CA 92052-5191
PO BOX 5192, OCEANSIDE, CA 92052-5192
PO BOX 5193, OCEANSIDE, CA 92052-5193
PO BOX 5194, OCEANSIDE, CA 92052-5194
PO BOX 5195, OCEANSIDE, CA 92052-5195
PO BOX 5196, OCEANSIDE, CA 92052-5196
PO BOX 5197, OCEANSIDE, CA 92052-5197
PO BOX 5198, OCEANSIDE, CA 92052-5198
PO BOX 5199, OCEANSIDE, CA 92052-5199
PO BOX 5200, OCEANSIDE, CA 92052-5200
PO BOX 5201, OCEANSIDE, CA 92052-5201
PO BOX 5202, OCEANSIDE, CA 92052-5202
PO BOX 5203, OCEANSIDE, CA 92052-5203
PO BOX 5204, OCEANSIDE, CA 92052-5204
PO BOX 5205, OCEANSIDE, CA 92052-5205
PO BOX 5206, OCEANSIDE, CA 92052-5206
PO BOX 5207, OCEANSIDE, CA 92052-5207
PO BOX 5208, OCEANSIDE, CA 92052-5208
PO BOX 5209, OCEANSIDE, CA 92052-5209
PO BOX 5210, OCEANSIDE, CA 92052-5210
PO BOX 5211, OCEANSIDE, CA 92052-5211
PO BOX 5212, OCEANSIDE, CA 92052-5212
PO BOX 5213, OCEANSIDE, CA 92052-5213
PO BOX 5214, OCEANSIDE, CA 92052-5214
PO BOX 5215, OCEANSIDE, CA 92052-5215
PO BOX 5216, OCEANSIDE, CA 92052-5216
PO BOX 5217, OCEANSIDE, CA 92052-5217
PO BOX 5218, OCEANSIDE, CA 92052-5218
PO BOX 5219, OCEANSIDE, CA 92052-5219
PO BOX 5220, OCEANSIDE, CA 92052-5220
PO BOX 5221, OCEANSIDE, CA 92052-5221
PO BOX 5222, OCEANSIDE, CA 92052-5222
PO BOX 5223, OCEANSIDE, CA 92052-5223
PO BOX 5224, OCEANSIDE, CA 92052-5224
PO BOX 5225, OCEANSIDE, CA 92052-5225
PO BOX 5226, OCEANSIDE, CA 92052-5226
PO BOX 5227, OCEANSIDE, CA 92052-5227
PO BOX 5228, OCEANSIDE, CA 92052-5228
PO BOX 5229, OCEANSIDE, CA 92052-5229
PO BOX 5230, OCEANSIDE, CA 92052-5230
PO BOX 5231, OCEANSIDE, CA 92052-5231
PO BOX 5232, OCEANSIDE, CA 92052-5232
PO BOX 5233, OCEANSIDE, CA 92052-5233
PO BOX 5234, OCEANSIDE, CA 92052-5234
PO BOX 5235, OCEANSIDE, CA 92052-5235
PO BOX 5236, OCEANSIDE, CA 92052-5236
PO BOX 5237, OCEANSIDE, CA 92052-5237
PO BOX 5238, OCEANSIDE, CA 92052-5238
PO BOX 5239, OCEANSIDE, CA 92052-5239
PO BOX 5240, OCEANSIDE, CA 92052-5240
PO BOX 5241, OCEANSIDE, CA 92052-5241
PO BOX 5242, OCEANSIDE, CA 92052-5242
PO BOX 5243, OCEANSIDE, CA 92052-5243
PO BOX 5244, OCEANSIDE, CA 92052-5244
PO BOX 5245, OCEANSIDE, CA 92052-5245
PO BOX 5246, OCEANSIDE, CA 92052-5246
PO BOX 5247, OCEANSIDE, CA 92052-5247
PO BOX 5248, OCEANSIDE, CA 92052-5248
PO BOX 5249, OCEANSIDE, CA 92052-5249
PO BOX 5250, OCEANSIDE, CA 92052-5250
PO BOX 5251, OCEANSIDE, CA 92052-5251
PO BOX 5252, OCEANSIDE, CA 92052-5252
PO BOX 5253, OCEANSIDE, CA 92052-5253
PO BOX 5254, OCEANSIDE, CA 92052-5254
PO BOX 5255, OCEANSIDE, CA 92052-5255
PO BOX 5256, OCEANSIDE, CA 92052-5256
PO BOX 5257, OCEANSIDE, CA 92052-5257
PO BOX 5258, OCEANSIDE, CA 92052-5258
PO BOX 5259, OCEANSIDE, CA 92052-5259
PO BOX 5260, OCEANSIDE, CA 92052-5260
PO BOX 5261, OCEANSIDE, CA 92052-5261
PO BOX 5262, OCEANSIDE, CA 92052-5262
PO BOX 5263, OCEANSIDE, CA 92052-5263
PO BOX 5264, OCEANSIDE, CA 92052-5264
PO BOX 5265, OCEANSIDE, CA 92052-5265
PO BOX 5266, OCEANSIDE, CA 92052-5266
PO BOX 5267, OCEANSIDE, CA 92052-5267
PO BOX 5268, OCEANSIDE, CA 92052-5268
PO BOX 5269, OCEANSIDE, CA 92052-5269
PO BOX 5270, OCEANSIDE, CA 92052-5270
PO BOX 5271, OCEANSIDE, CA 92052-5271
PO BOX 5272, OCEANSIDE, CA 92052-5272
PO BOX 5273, OCEANSIDE, CA 92052-5273
PO BOX 5274, OCEANSIDE, CA 92052-5274
PO BOX 5275, OCEANSIDE, CA 92052-5275
PO BOX 5276, OCEANSIDE, CA 92052-5276
PO BOX 5277, OCEANSIDE, CA 92052-5277
PO BOX 5278, OCEANSIDE, CA 92052-5278
PO BOX 5279, OCEANSIDE, CA 92052-5279
PO BOX 5280, OCEANSIDE, CA 92052-5280
PO BOX 5281, OCEANSIDE, CA 92052-5281
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