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 341, SPARTANBURG, SC 29304-0341
PO BOX 342, SPARTANBURG, SC 29304-0342
PO BOX 343, SPARTANBURG, SC 29304-0343
PO BOX 344, SPARTANBURG, SC 29304-0344
PO BOX 345, SPARTANBURG, SC 29304-0345
PO BOX 346, SPARTANBURG, SC 29304-0346
PO BOX 347, SPARTANBURG, SC 29304-0347
PO BOX 348, SPARTANBURG, SC 29304-0348
PO BOX 349, SPARTANBURG, SC 29304-0349
PO BOX 350, SPARTANBURG, SC 29304-0350
PO BOX 351, SPARTANBURG, SC 29304-0351
PO BOX 352, SPARTANBURG, SC 29304-0352
PO BOX 353, SPARTANBURG, SC 29304-0353
PO BOX 354, SPARTANBURG, SC 29304-0354
PO BOX 355, SPARTANBURG, SC 29304-0355
PO BOX 356, SPARTANBURG, SC 29304-0356
PO BOX 357, SPARTANBURG, SC 29304-0357
PO BOX 358, SPARTANBURG, SC 29304-0358
PO BOX 359, SPARTANBURG, SC 29304-0359
PO BOX 360, SPARTANBURG, SC 29304-0360
PO BOX 361, SPARTANBURG, SC 29304-0361
PO BOX 362, SPARTANBURG, SC 29304-0362
PO BOX 363, SPARTANBURG, SC 29304-0363
PO BOX 364, SPARTANBURG, SC 29304-0364
PO BOX 365, SPARTANBURG, SC 29304-0365
PO BOX 366, SPARTANBURG, SC 29304-0366
PO BOX 367, SPARTANBURG, SC 29304-0367
PO BOX 368, SPARTANBURG, SC 29304-0368
PO BOX 369, SPARTANBURG, SC 29304-0369
PO BOX 370, SPARTANBURG, SC 29304-0370
PO BOX 371, SPARTANBURG, SC 29304-0371
PO BOX 372, SPARTANBURG, SC 29304-0372
PO BOX 373, SPARTANBURG, SC 29304-0373
PO BOX 374, SPARTANBURG, SC 29304-0374
PO BOX 375, SPARTANBURG, SC 29304-0375
PO BOX 376, SPARTANBURG, SC 29304-0376
PO BOX 377, SPARTANBURG, SC 29304-0377
PO BOX 378, SPARTANBURG, SC 29304-0378
PO BOX 379, SPARTANBURG, SC 29304-0379
PO BOX 380, SPARTANBURG, SC 29304-0380
PO BOX 381, SPARTANBURG, SC 29304-0381
PO BOX 382, SPARTANBURG, SC 29304-0382
PO BOX 383, SPARTANBURG, SC 29304-0383
PO BOX 384, SPARTANBURG, SC 29304-0384
PO BOX 385, SPARTANBURG, SC 29304-0385
PO BOX 386, SPARTANBURG, SC 29304-0386
PO BOX 387, SPARTANBURG, SC 29304-0387
PO BOX 388, SPARTANBURG, SC 29304-0388
PO BOX 389, SPARTANBURG, SC 29304-0389
PO BOX 390, SPARTANBURG, SC 29304-0390
PO BOX 391, SPARTANBURG, SC 29304-0391
PO BOX 392, SPARTANBURG, SC 29304-0392
PO BOX 393, SPARTANBURG, SC 29304-0393
PO BOX 394, SPARTANBURG, SC 29304-0394
PO BOX 395, SPARTANBURG, SC 29304-0395
PO BOX 396, SPARTANBURG, SC 29304-0396
PO BOX 397, SPARTANBURG, SC 29304-0397
PO BOX 398, SPARTANBURG, SC 29304-0398
PO BOX 399, SPARTANBURG, SC 29304-0399
PO BOX 400, SPARTANBURG, SC 29304-0400
PO BOX 401, SPARTANBURG, SC 29304-0401
PO BOX 402, SPARTANBURG, SC 29304-0402
PO BOX 403, SPARTANBURG, SC 29304-0403
PO BOX 404, SPARTANBURG, SC 29304-0404
PO BOX 405, SPARTANBURG, SC 29304-0405
PO BOX 406, SPARTANBURG, SC 29304-0406
PO BOX 407, SPARTANBURG, SC 29304-0407
PO BOX 408, SPARTANBURG, SC 29304-0408
PO BOX 409, SPARTANBURG, SC 29304-0409
PO BOX 410, SPARTANBURG, SC 29304-0410
PO BOX 411, SPARTANBURG, SC 29304-0411
PO BOX 412, SPARTANBURG, SC 29304-0412
PO BOX 413, SPARTANBURG, SC 29304-0413
PO BOX 414, SPARTANBURG, SC 29304-0414
PO BOX 415, SPARTANBURG, SC 29304-0415
PO BOX 416, SPARTANBURG, SC 29304-0416
PO BOX 417, SPARTANBURG, SC 29304-0417
PO BOX 418, SPARTANBURG, SC 29304-0418
PO BOX 419, SPARTANBURG, SC 29304-0419
PO BOX 420, SPARTANBURG, SC 29304-0420
PO BOX 421, SPARTANBURG, SC 29304-0421
PO BOX 422, SPARTANBURG, SC 29304-0422
PO BOX 423, SPARTANBURG, SC 29304-0423
PO BOX 424, SPARTANBURG, SC 29304-0424
PO BOX 425, SPARTANBURG, SC 29304-0425
PO BOX 426, SPARTANBURG, SC 29304-0426
PO BOX 427, SPARTANBURG, SC 29304-0427
PO BOX 428, SPARTANBURG, SC 29304-0428
PO BOX 429, SPARTANBURG, SC 29304-0429
PO BOX 430, SPARTANBURG, SC 29304-0430
PO BOX 431, SPARTANBURG, SC 29304-0431
PO BOX 432, SPARTANBURG, SC 29304-0432
PO BOX 433, SPARTANBURG, SC 29304-0433
PO BOX 434, SPARTANBURG, SC 29304-0434
PO BOX 435, SPARTANBURG, SC 29304-0435
PO BOX 436, SPARTANBURG, SC 29304-0436
PO BOX 437, SPARTANBURG, SC 29304-0437
PO BOX 438, SPARTANBURG, SC 29304-0438
PO BOX 439, SPARTANBURG, SC 29304-0439
PO BOX 440, SPARTANBURG, SC 29304-0440
PO BOX 441, SPARTANBURG, SC 29304-0441
PO BOX 442, SPARTANBURG, SC 29304-0442
PO BOX 443, SPARTANBURG, SC 29304-0443
PO BOX 444, SPARTANBURG, SC 29304-0444
PO BOX 445, SPARTANBURG, SC 29304-0445
PO BOX 446, SPARTANBURG, SC 29304-0446
PO BOX 447, SPARTANBURG, SC 29304-0447
PO BOX 448, SPARTANBURG, SC 29304-0448
PO BOX 449, SPARTANBURG, SC 29304-0449
PO BOX 450, SPARTANBURG, SC 29304-0450
PO BOX 451, SPARTANBURG, SC 29304-0451
PO BOX 452, SPARTANBURG, SC 29304-0452
PO BOX 453, SPARTANBURG, SC 29304-0453
PO BOX 454, SPARTANBURG, SC 29304-0454
PO BOX 455, SPARTANBURG, SC 29304-0455
PO BOX 456, SPARTANBURG, SC 29304-0456
PO BOX 457, SPARTANBURG, SC 29304-0457
PO BOX 458, SPARTANBURG, SC 29304-0458
PO BOX 459, SPARTANBURG, SC 29304-0459
PO BOX 460, SPARTANBURG, SC 29304-0460
PO BOX 461, SPARTANBURG, SC 29304-0461
PO BOX 462, SPARTANBURG, SC 29304-0462
PO BOX 463, SPARTANBURG, SC 29304-0463
PO BOX 464, SPARTANBURG, SC 29304-0464
PO BOX 465, SPARTANBURG, SC 29304-0465
PO BOX 466, SPARTANBURG, SC 29304-0466
PO BOX 467, SPARTANBURG, SC 29304-0467
PO BOX 468, SPARTANBURG, SC 29304-0468
PO BOX 469, SPARTANBURG, SC 29304-0469
PO BOX 470, SPARTANBURG, SC 29304-0470
PO BOX 471, SPARTANBURG, SC 29304-0471
PO BOX 472, SPARTANBURG, SC 29304-0472
PO BOX 473, SPARTANBURG, SC 29304-0473
PO BOX 474, SPARTANBURG, SC 29304-0474
PO BOX 475, SPARTANBURG, SC 29304-0475
PO BOX 476, SPARTANBURG, SC 29304-0476
PO BOX 477, SPARTANBURG, SC 29304-0477
PO BOX 478, SPARTANBURG, SC 29304-0478
PO BOX 479, SPARTANBURG, SC 29304-0479
PO BOX 480, SPARTANBURG, SC 29304-0480
PO BOX 481, SPARTANBURG, SC 29304-0481
PO BOX 482, SPARTANBURG, SC 29304-0482
PO BOX 483, SPARTANBURG, SC 29304-0483
PO BOX 484, SPARTANBURG, SC 29304-0484
PO BOX 485, SPARTANBURG, SC 29304-0485
PO BOX 486, SPARTANBURG, SC 29304-0486
PO BOX 487, SPARTANBURG, SC 29304-0487
PO BOX 488, SPARTANBURG, SC 29304-0488
PO BOX 489, SPARTANBURG, SC 29304-0489
PO BOX 490, SPARTANBURG, SC 29304-0490
PO BOX 491, SPARTANBURG, SC 29304-0491
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