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 5181, SPARTANBURG, SC 29304-5181
PO BOX 5182, SPARTANBURG, SC 29304-5182
PO BOX 5183, SPARTANBURG, SC 29304-5183
PO BOX 5184, SPARTANBURG, SC 29304-5184
PO BOX 5185, SPARTANBURG, SC 29304-5185
PO BOX 5186, SPARTANBURG, SC 29304-5186
PO BOX 5187, SPARTANBURG, SC 29304-5187
PO BOX 5188, SPARTANBURG, SC 29304-5188
PO BOX 5189, SPARTANBURG, SC 29304-5189
PO BOX 5190, SPARTANBURG, SC 29304-5190
PO BOX 5191, SPARTANBURG, SC 29304-5191
PO BOX 5192, SPARTANBURG, SC 29304-5192
PO BOX 5193, SPARTANBURG, SC 29304-5193
PO BOX 5194, SPARTANBURG, SC 29304-5194
PO BOX 5195, SPARTANBURG, SC 29304-5195
PO BOX 5196, SPARTANBURG, SC 29304-5196
PO BOX 5197, SPARTANBURG, SC 29304-5197
PO BOX 5198, SPARTANBURG, SC 29304-5198
PO BOX 5199, SPARTANBURG, SC 29304-5199
PO BOX 5200, SPARTANBURG, SC 29304-5200
PO BOX 5201, SPARTANBURG, SC 29304-5201
PO BOX 5202, SPARTANBURG, SC 29304-5202
PO BOX 5203, SPARTANBURG, SC 29304-5203
PO BOX 5204, SPARTANBURG, SC 29304-5204
PO BOX 5205, SPARTANBURG, SC 29304-5205
PO BOX 5206, SPARTANBURG, SC 29304-5206
PO BOX 5207, SPARTANBURG, SC 29304-5207
PO BOX 5208, SPARTANBURG, SC 29304-5208
PO BOX 5209, SPARTANBURG, SC 29304-5209
PO BOX 5210, SPARTANBURG, SC 29304-5210
PO BOX 5211, SPARTANBURG, SC 29304-5211
PO BOX 5212, SPARTANBURG, SC 29304-5212
PO BOX 5213, SPARTANBURG, SC 29304-5213
PO BOX 5214, SPARTANBURG, SC 29304-5214
PO BOX 5215, SPARTANBURG, SC 29304-5215
PO BOX 5216, SPARTANBURG, SC 29304-5216
PO BOX 5217, SPARTANBURG, SC 29304-5217
PO BOX 5218, SPARTANBURG, SC 29304-5218
PO BOX 5219, SPARTANBURG, SC 29304-5219
PO BOX 5220, SPARTANBURG, SC 29304-5220
PO BOX 5221, SPARTANBURG, SC 29304-5221
PO BOX 5222, SPARTANBURG, SC 29304-5222
PO BOX 5223, SPARTANBURG, SC 29304-5223
PO BOX 5224, SPARTANBURG, SC 29304-5224
PO BOX 5225, SPARTANBURG, SC 29304-5225
PO BOX 5226, SPARTANBURG, SC 29304-5226
PO BOX 5227, SPARTANBURG, SC 29304-5227
PO BOX 5228, SPARTANBURG, SC 29304-5228
PO BOX 5229, SPARTANBURG, SC 29304-5229
PO BOX 5230, SPARTANBURG, SC 29304-5230
PO BOX 5231, SPARTANBURG, SC 29304-5231
PO BOX 5232, SPARTANBURG, SC 29304-5232
PO BOX 5233, SPARTANBURG, SC 29304-5233
PO BOX 5234, SPARTANBURG, SC 29304-5234
PO BOX 5235, SPARTANBURG, SC 29304-5235
PO BOX 5236, SPARTANBURG, SC 29304-5236
PO BOX 5237, SPARTANBURG, SC 29304-5237
PO BOX 5238, SPARTANBURG, SC 29304-5238
PO BOX 5239, SPARTANBURG, SC 29304-5239
PO BOX 5240, SPARTANBURG, SC 29304-5240
PO BOX 5241, SPARTANBURG, SC 29304-5241
PO BOX 5242, SPARTANBURG, SC 29304-5242
PO BOX 5243, SPARTANBURG, SC 29304-5243
PO BOX 5244, SPARTANBURG, SC 29304-5244
PO BOX 5245, SPARTANBURG, SC 29304-5245
PO BOX 5246, SPARTANBURG, SC 29304-5246
PO BOX 5247, SPARTANBURG, SC 29304-5247
PO BOX 5248, SPARTANBURG, SC 29304-5248
PO BOX 5249, SPARTANBURG, SC 29304-5249
PO BOX 5250, SPARTANBURG, SC 29304-5250
PO BOX 5251, SPARTANBURG, SC 29304-5251
PO BOX 5252, SPARTANBURG, SC 29304-5252
PO BOX 5253, SPARTANBURG, SC 29304-5253
PO BOX 5254, SPARTANBURG, SC 29304-5254
PO BOX 5255, SPARTANBURG, SC 29304-5255
PO BOX 5256, SPARTANBURG, SC 29304-5256
PO BOX 5257, SPARTANBURG, SC 29304-5257
PO BOX 5258, SPARTANBURG, SC 29304-5258
PO BOX 5259, SPARTANBURG, SC 29304-5259
PO BOX 5260, SPARTANBURG, SC 29304-5260
PO BOX 5261, SPARTANBURG, SC 29304-5261
PO BOX 5262, SPARTANBURG, SC 29304-5262
PO BOX 5263, SPARTANBURG, SC 29304-5263
PO BOX 5264, SPARTANBURG, SC 29304-5264
PO BOX 5265, SPARTANBURG, SC 29304-5265
PO BOX 5266, SPARTANBURG, SC 29304-5266
PO BOX 5267, SPARTANBURG, SC 29304-5267
PO BOX 5268, SPARTANBURG, SC 29304-5268
PO BOX 5269, SPARTANBURG, SC 29304-5269
PO BOX 5270, SPARTANBURG, SC 29304-5270
PO BOX 5271, SPARTANBURG, SC 29304-5271
PO BOX 5272, SPARTANBURG, SC 29304-5272
PO BOX 5273, SPARTANBURG, SC 29304-5273
PO BOX 5274, SPARTANBURG, SC 29304-5274
PO BOX 5275, SPARTANBURG, SC 29304-5275
PO BOX 5276, SPARTANBURG, SC 29304-5276
PO BOX 5277, SPARTANBURG, SC 29304-5277
PO BOX 5278, SPARTANBURG, SC 29304-5278
PO BOX 5279, SPARTANBURG, SC 29304-5279
PO BOX 5280, SPARTANBURG, SC 29304-5280
PO BOX 5281, SPARTANBURG, SC 29304-5281
PO BOX 5282, SPARTANBURG, SC 29304-5282
PO BOX 5283, SPARTANBURG, SC 29304-5283
PO BOX 5284, SPARTANBURG, SC 29304-5284
PO BOX 5285, SPARTANBURG, SC 29304-5285
PO BOX 5286, SPARTANBURG, SC 29304-5286
PO BOX 5287, SPARTANBURG, SC 29304-5287
PO BOX 5288, SPARTANBURG, SC 29304-5288
PO BOX 5289, SPARTANBURG, SC 29304-5289
PO BOX 5290, SPARTANBURG, SC 29304-5290
PO BOX 5291, SPARTANBURG, SC 29304-5291
PO BOX 5292, SPARTANBURG, SC 29304-5292
PO BOX 5293, SPARTANBURG, SC 29304-5293
PO BOX 5294, SPARTANBURG, SC 29304-5294
PO BOX 5295, SPARTANBURG, SC 29304-5295
PO BOX 5296, SPARTANBURG, SC 29304-5296
PO BOX 5297, SPARTANBURG, SC 29304-5297
PO BOX 5298, SPARTANBURG, SC 29304-5298
PO BOX 5299, SPARTANBURG, SC 29304-5299
PO BOX 5300, SPARTANBURG, SC 29304-5300
PO BOX 5301, SPARTANBURG, SC 29304-5301
PO BOX 5302, SPARTANBURG, SC 29304-5302
PO BOX 5303, SPARTANBURG, SC 29304-5303
PO BOX 5304, SPARTANBURG, SC 29304-5304
PO BOX 5305, SPARTANBURG, SC 29304-5305
PO BOX 5306, SPARTANBURG, SC 29304-5306
PO BOX 5307, SPARTANBURG, SC 29304-5307
PO BOX 5308, SPARTANBURG, SC 29304-5308
PO BOX 5309, SPARTANBURG, SC 29304-5309
PO BOX 5310, SPARTANBURG, SC 29304-5310
PO BOX 5311, SPARTANBURG, SC 29304-5311
PO BOX 5312, SPARTANBURG, SC 29304-5312
PO BOX 5313, SPARTANBURG, SC 29304-5313
PO BOX 5314, SPARTANBURG, SC 29304-5314
PO BOX 5315, SPARTANBURG, SC 29304-5315
PO BOX 5316, SPARTANBURG, SC 29304-5316
PO BOX 5317, SPARTANBURG, SC 29304-5317
PO BOX 5318, SPARTANBURG, SC 29304-5318
PO BOX 5319, SPARTANBURG, SC 29304-5319
PO BOX 5320, SPARTANBURG, SC 29304-5320
PO BOX 5321, SPARTANBURG, SC 29304-5321
PO BOX 5322, SPARTANBURG, SC 29304-5322
PO BOX 5323, SPARTANBURG, SC 29304-5323
PO BOX 5324, SPARTANBURG, SC 29304-5324
PO BOX 5325, SPARTANBURG, SC 29304-5325
PO BOX 5326, SPARTANBURG, SC 29304-5326
PO BOX 5327, SPARTANBURG, SC 29304-5327
PO BOX 5328, SPARTANBURG, SC 29304-5328
PO BOX 5329, SPARTANBURG, SC 29304-5329
PO BOX 5330, SPARTANBURG, SC 29304-5330
PO BOX 5331, SPARTANBURG, SC 29304-5331
PO BOX 5332, SPARTANBURG, SC 29304-5332
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