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 361, JOHNSONVILLE, SC 29555-0361
PO BOX 362, JOHNSONVILLE, SC 29555-0362
PO BOX 363, JOHNSONVILLE, SC 29555-0363
PO BOX 364, JOHNSONVILLE, SC 29555-0364
PO BOX 365, JOHNSONVILLE, SC 29555-0365
PO BOX 366, JOHNSONVILLE, SC 29555-0366
PO BOX 367, JOHNSONVILLE, SC 29555-0367
PO BOX 368, JOHNSONVILLE, SC 29555-0368
PO BOX 369, JOHNSONVILLE, SC 29555-0369
PO BOX 370, JOHNSONVILLE, SC 29555-0370
PO BOX 371, JOHNSONVILLE, SC 29555-0371
PO BOX 372, JOHNSONVILLE, SC 29555-0372
PO BOX 373, JOHNSONVILLE, SC 29555-0373
PO BOX 374, JOHNSONVILLE, SC 29555-0374
PO BOX 375, JOHNSONVILLE, SC 29555-0375
PO BOX 376, JOHNSONVILLE, SC 29555-0376
PO BOX 377, JOHNSONVILLE, SC 29555-0377
PO BOX 378, JOHNSONVILLE, SC 29555-0378
PO BOX 379, JOHNSONVILLE, SC 29555-0379
PO BOX 380, JOHNSONVILLE, SC 29555-0380
PO BOX 381, JOHNSONVILLE, SC 29555-0381
PO BOX 382, JOHNSONVILLE, SC 29555-0382
PO BOX 383, JOHNSONVILLE, SC 29555-0383
PO BOX 384, JOHNSONVILLE, SC 29555-0384
PO BOX 385, JOHNSONVILLE, SC 29555-0385
PO BOX 386, JOHNSONVILLE, SC 29555-0386
PO BOX 387, JOHNSONVILLE, SC 29555-0387
PO BOX 388, JOHNSONVILLE, SC 29555-0388
PO BOX 389, JOHNSONVILLE, SC 29555-0389
PO BOX 390, JOHNSONVILLE, SC 29555-0390
PO BOX 391, JOHNSONVILLE, SC 29555-0391
PO BOX 392, JOHNSONVILLE, SC 29555-0392
PO BOX 393, JOHNSONVILLE, SC 29555-0393
PO BOX 394, JOHNSONVILLE, SC 29555-0394
PO BOX 395, JOHNSONVILLE, SC 29555-0395
PO BOX 396, JOHNSONVILLE, SC 29555-0396
PO BOX 397, JOHNSONVILLE, SC 29555-0397
PO BOX 398, JOHNSONVILLE, SC 29555-0398
PO BOX 399, JOHNSONVILLE, SC 29555-0399
PO BOX 400, JOHNSONVILLE, SC 29555-0400
PO BOX 401, JOHNSONVILLE, SC 29555-0401
PO BOX 402, JOHNSONVILLE, SC 29555-0402
PO BOX 403, JOHNSONVILLE, SC 29555-0403
PO BOX 404, JOHNSONVILLE, SC 29555-0404
PO BOX 405, JOHNSONVILLE, SC 29555-0405
PO BOX 406, JOHNSONVILLE, SC 29555-0406
PO BOX 407, JOHNSONVILLE, SC 29555-0407
PO BOX 408, JOHNSONVILLE, SC 29555-0408
PO BOX 409, JOHNSONVILLE, SC 29555-0409
PO BOX 410, JOHNSONVILLE, SC 29555-0410
PO BOX 411, JOHNSONVILLE, SC 29555-0411
PO BOX 412, JOHNSONVILLE, SC 29555-0412
PO BOX 413, JOHNSONVILLE, SC 29555-0413
PO BOX 414, JOHNSONVILLE, SC 29555-0414
PO BOX 415, JOHNSONVILLE, SC 29555-0415
PO BOX 416, JOHNSONVILLE, SC 29555-0416
PO BOX 417, JOHNSONVILLE, SC 29555-0417
PO BOX 418, JOHNSONVILLE, SC 29555-0418
PO BOX 419, JOHNSONVILLE, SC 29555-0419
PO BOX 420, JOHNSONVILLE, SC 29555-0420
PO BOX 421, JOHNSONVILLE, SC 29555-0421
PO BOX 422, JOHNSONVILLE, SC 29555-0422
PO BOX 423, JOHNSONVILLE, SC 29555-0423
PO BOX 424, JOHNSONVILLE, SC 29555-0424
PO BOX 425, JOHNSONVILLE, SC 29555-0425
PO BOX 426, JOHNSONVILLE, SC 29555-0426
PO BOX 427, JOHNSONVILLE, SC 29555-0427
PO BOX 428, JOHNSONVILLE, SC 29555-0428
PO BOX 429, JOHNSONVILLE, SC 29555-0429
PO BOX 430, JOHNSONVILLE, SC 29555-0430
PO BOX 431, JOHNSONVILLE, SC 29555-0431
PO BOX 432, JOHNSONVILLE, SC 29555-0432
PO BOX 433, JOHNSONVILLE, SC 29555-0433
PO BOX 434, JOHNSONVILLE, SC 29555-0434
PO BOX 435, JOHNSONVILLE, SC 29555-0435
PO BOX 436, JOHNSONVILLE, SC 29555-0436
PO BOX 437, JOHNSONVILLE, SC 29555-0437
PO BOX 438, JOHNSONVILLE, SC 29555-0438
PO BOX 439, JOHNSONVILLE, SC 29555-0439
PO BOX 440, JOHNSONVILLE, SC 29555-0440
PO BOX 441, JOHNSONVILLE, SC 29555-0441
PO BOX 442, JOHNSONVILLE, SC 29555-0442
PO BOX 443, JOHNSONVILLE, SC 29555-0443
PO BOX 444, JOHNSONVILLE, SC 29555-0444
PO BOX 445, JOHNSONVILLE, SC 29555-0445
PO BOX 446, JOHNSONVILLE, SC 29555-0446
PO BOX 447, JOHNSONVILLE, SC 29555-0447
PO BOX 448, JOHNSONVILLE, SC 29555-0448
PO BOX 449, JOHNSONVILLE, SC 29555-0449
PO BOX 450, JOHNSONVILLE, SC 29555-0450
PO BOX 451, JOHNSONVILLE, SC 29555-0451
PO BOX 452, JOHNSONVILLE, SC 29555-0452
PO BOX 453, JOHNSONVILLE, SC 29555-0453
PO BOX 454, JOHNSONVILLE, SC 29555-0454
PO BOX 455, JOHNSONVILLE, SC 29555-0455
PO BOX 456, JOHNSONVILLE, SC 29555-0456
PO BOX 457, JOHNSONVILLE, SC 29555-0457
PO BOX 458, JOHNSONVILLE, SC 29555-0458
PO BOX 459, JOHNSONVILLE, SC 29555-0459
PO BOX 460, JOHNSONVILLE, SC 29555-0460
PO BOX 461, JOHNSONVILLE, SC 29555-0461
PO BOX 462, JOHNSONVILLE, SC 29555-0462
PO BOX 463, JOHNSONVILLE, SC 29555-0463
PO BOX 464, JOHNSONVILLE, SC 29555-0464
PO BOX 465, JOHNSONVILLE, SC 29555-0465
PO BOX 466, JOHNSONVILLE, SC 29555-0466
PO BOX 467, JOHNSONVILLE, SC 29555-0467
PO BOX 468, JOHNSONVILLE, SC 29555-0468
PO BOX 469, JOHNSONVILLE, SC 29555-0469
PO BOX 470, JOHNSONVILLE, SC 29555-0470
PO BOX 471, JOHNSONVILLE, SC 29555-0471
PO BOX 472, JOHNSONVILLE, SC 29555-0472
PO BOX 473, JOHNSONVILLE, SC 29555-0473
PO BOX 474, JOHNSONVILLE, SC 29555-0474
PO BOX 475, JOHNSONVILLE, SC 29555-0475
PO BOX 476, JOHNSONVILLE, SC 29555-0476
PO BOX 477, JOHNSONVILLE, SC 29555-0477
PO BOX 478, JOHNSONVILLE, SC 29555-0478
PO BOX 479, JOHNSONVILLE, SC 29555-0479
PO BOX 480, JOHNSONVILLE, SC 29555-0480
PO BOX 481, JOHNSONVILLE, SC 29555-0481
PO BOX 482, JOHNSONVILLE, SC 29555-0482
PO BOX 483, JOHNSONVILLE, SC 29555-0483
PO BOX 484, JOHNSONVILLE, SC 29555-0484
PO BOX 485, JOHNSONVILLE, SC 29555-0485
PO BOX 486, JOHNSONVILLE, SC 29555-0486
PO BOX 487, JOHNSONVILLE, SC 29555-0487
PO BOX 488, JOHNSONVILLE, SC 29555-0488
PO BOX 489, JOHNSONVILLE, SC 29555-0489
PO BOX 490, JOHNSONVILLE, SC 29555-0490
PO BOX 491, JOHNSONVILLE, SC 29555-0491
PO BOX 492, JOHNSONVILLE, SC 29555-0492
PO BOX 493, JOHNSONVILLE, SC 29555-0493
PO BOX 494, JOHNSONVILLE, SC 29555-0494
PO BOX 495, JOHNSONVILLE, SC 29555-0495
PO BOX 496, JOHNSONVILLE, SC 29555-0496
PO BOX 497, JOHNSONVILLE, SC 29555-0497
PO BOX 498, JOHNSONVILLE, SC 29555-0498
PO BOX 499, JOHNSONVILLE, SC 29555-0499
PO BOX 500, JOHNSONVILLE, SC 29555-0500
PO BOX 501, JOHNSONVILLE, SC 29555-0501
PO BOX 502, JOHNSONVILLE, SC 29555-0502
PO BOX 503, JOHNSONVILLE, SC 29555-0503
PO BOX 504, JOHNSONVILLE, SC 29555-0504
PO BOX 505, JOHNSONVILLE, SC 29555-0505
PO BOX 506, JOHNSONVILLE, SC 29555-0506
PO BOX 507, JOHNSONVILLE, SC 29555-0507
PO BOX 508, JOHNSONVILLE, SC 29555-0508
PO BOX 509, JOHNSONVILLE, SC 29555-0509
PO BOX 510, JOHNSONVILLE, SC 29555-0510
PO BOX 511, JOHNSONVILLE, SC 29555-0511
PO BOX 512, JOHNSONVILLE, SC 29555-0512
PO BOX 513, JOHNSONVILLE, SC 29555-0513
PO BOX 514, JOHNSONVILLE, SC 29555-0514
PO BOX 515, JOHNSONVILLE, SC 29555-0515
PO BOX 516, JOHNSONVILLE, SC 29555-0516
PO BOX 517, JOHNSONVILLE, SC 29555-0517
PO BOX 518, JOHNSONVILLE, SC 29555-0518
PO BOX 519, JOHNSONVILLE, SC 29555-0519
PO BOX 520, JOHNSONVILLE, SC 29555-0520
PO BOX 521, JOHNSONVILLE, SC 29555-0521
PO BOX 522, JOHNSONVILLE, SC 29555-0522
PO BOX 523, JOHNSONVILLE, SC 29555-0523
PO BOX 524, JOHNSONVILLE, SC 29555-0524
PO BOX 525, JOHNSONVILLE, SC 29555-0525
PO BOX 526, JOHNSONVILLE, SC 29555-0526
PO BOX 527, JOHNSONVILLE, SC 29555-0527
PO BOX 528, JOHNSONVILLE, SC 29555-0528
PO BOX 529, JOHNSONVILLE, SC 29555-0529
PO BOX 530, JOHNSONVILLE, SC 29555-0530
PO BOX 531, JOHNSONVILLE, SC 29555-0531
PO BOX 532, JOHNSONVILLE, SC 29555-0532
PO BOX 533, JOHNSONVILLE, SC 29555-0533
PO BOX 534, JOHNSONVILLE, SC 29555-0534
PO BOX 535, JOHNSONVILLE, SC 29555-0535
PO BOX 536, JOHNSONVILLE, SC 29555-0536
PO BOX 537, JOHNSONVILLE, SC 29555-0537
PO BOX 538, JOHNSONVILLE, SC 29555-0538
PO BOX 539, JOHNSONVILLE, SC 29555-0539
PO BOX 540, JOHNSONVILLE, SC 29555-0540
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