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 301, GREENWOOD, SC 29648-0301
PO BOX 302, GREENWOOD, SC 29648-0302
PO BOX 303, GREENWOOD, SC 29648-0303
PO BOX 304, GREENWOOD, SC 29648-0304
PO BOX 305, GREENWOOD, SC 29648-0305
PO BOX 306, GREENWOOD, SC 29648-0306
PO BOX 307, GREENWOOD, SC 29648-0307
PO BOX 308, GREENWOOD, SC 29648-0308
PO BOX 309, GREENWOOD, SC 29648-0309
PO BOX 310, GREENWOOD, SC 29648-0310
PO BOX 311, GREENWOOD, SC 29648-0311
PO BOX 312, GREENWOOD, SC 29648-0312
PO BOX 313, GREENWOOD, SC 29648-0313
PO BOX 314, GREENWOOD, SC 29648-0314
PO BOX 315, GREENWOOD, SC 29648-0315
PO BOX 316, GREENWOOD, SC 29648-0316
PO BOX 317, GREENWOOD, SC 29648-0317
PO BOX 318, GREENWOOD, SC 29648-0318
PO BOX 319, GREENWOOD, SC 29648-0319
PO BOX 320, GREENWOOD, SC 29648-0320
PO BOX 321, GREENWOOD, SC 29648-0321
PO BOX 322, GREENWOOD, SC 29648-0322
PO BOX 323, GREENWOOD, SC 29648-0323
PO BOX 324, GREENWOOD, SC 29648-0324
PO BOX 325, GREENWOOD, SC 29648-0325
PO BOX 326, GREENWOOD, SC 29648-0326
PO BOX 327, GREENWOOD, SC 29648-0327
PO BOX 328, GREENWOOD, SC 29648-0328
PO BOX 329, GREENWOOD, SC 29648-0329
PO BOX 330, GREENWOOD, SC 29648-0330
PO BOX 331, GREENWOOD, SC 29648-0331
PO BOX 332, GREENWOOD, SC 29648-0332
PO BOX 333, GREENWOOD, SC 29648-0333
PO BOX 334, GREENWOOD, SC 29648-0334
PO BOX 335, GREENWOOD, SC 29648-0335
PO BOX 336, GREENWOOD, SC 29648-0336
PO BOX 337, GREENWOOD, SC 29648-0337
PO BOX 338, GREENWOOD, SC 29648-0338
PO BOX 339, GREENWOOD, SC 29648-0339
PO BOX 340, GREENWOOD, SC 29648-0340
PO BOX 341, GREENWOOD, SC 29648-0341
PO BOX 342, GREENWOOD, SC 29648-0342
PO BOX 343, GREENWOOD, SC 29648-0343
PO BOX 344, GREENWOOD, SC 29648-0344
PO BOX 345, GREENWOOD, SC 29648-0345
PO BOX 346, GREENWOOD, SC 29648-0346
PO BOX 347, GREENWOOD, SC 29648-0347
PO BOX 348, GREENWOOD, SC 29648-0348
PO BOX 349, GREENWOOD, SC 29648-0349
PO BOX 350, GREENWOOD, SC 29648-0350
PO BOX 351, GREENWOOD, SC 29648-0351
PO BOX 352, GREENWOOD, SC 29648-0352
PO BOX 353, GREENWOOD, SC 29648-0353
PO BOX 354, GREENWOOD, SC 29648-0354
PO BOX 355, GREENWOOD, SC 29648-0355
PO BOX 356, GREENWOOD, SC 29648-0356
PO BOX 357, GREENWOOD, SC 29648-0357
PO BOX 358, GREENWOOD, SC 29648-0358
PO BOX 359, GREENWOOD, SC 29648-0359
PO BOX 360, GREENWOOD, SC 29648-0360
PO BOX 361, GREENWOOD, SC 29648-0361
PO BOX 362, GREENWOOD, SC 29648-0362
PO BOX 363, GREENWOOD, SC 29648-0363
PO BOX 364, GREENWOOD, SC 29648-0364
PO BOX 365, GREENWOOD, SC 29648-0365
PO BOX 366, GREENWOOD, SC 29648-0366
PO BOX 367, GREENWOOD, SC 29648-0367
PO BOX 368, GREENWOOD, SC 29648-0368
PO BOX 369, GREENWOOD, SC 29648-0369
PO BOX 370, GREENWOOD, SC 29648-0370
PO BOX 371, GREENWOOD, SC 29648-0371
PO BOX 372, GREENWOOD, SC 29648-0372
PO BOX 373, GREENWOOD, SC 29648-0373
PO BOX 374, GREENWOOD, SC 29648-0374
PO BOX 375, GREENWOOD, SC 29648-0375
PO BOX 376, GREENWOOD, SC 29648-0376
PO BOX 377, GREENWOOD, SC 29648-0377
PO BOX 378, GREENWOOD, SC 29648-0378
PO BOX 379, GREENWOOD, SC 29648-0379
PO BOX 380, GREENWOOD, SC 29648-0380
PO BOX 381, GREENWOOD, SC 29648-0381
PO BOX 382, GREENWOOD, SC 29648-0382
PO BOX 383, GREENWOOD, SC 29648-0383
PO BOX 384, GREENWOOD, SC 29648-0384
PO BOX 385, GREENWOOD, SC 29648-0385
PO BOX 386, GREENWOOD, SC 29648-0386
PO BOX 387, GREENWOOD, SC 29648-0387
PO BOX 388, GREENWOOD, SC 29648-0388
PO BOX 389, GREENWOOD, SC 29648-0389
PO BOX 390, GREENWOOD, SC 29648-0390
PO BOX 391, GREENWOOD, SC 29648-0391
PO BOX 392, GREENWOOD, SC 29648-0392
PO BOX 393, GREENWOOD, SC 29648-0393
PO BOX 394, GREENWOOD, SC 29648-0394
PO BOX 395, GREENWOOD, SC 29648-0395
PO BOX 396, GREENWOOD, SC 29648-0396
PO BOX 397, GREENWOOD, SC 29648-0397
PO BOX 398, GREENWOOD, SC 29648-0398
PO BOX 399, GREENWOOD, SC 29648-0399
PO BOX 400, GREENWOOD, SC 29648-0400
PO BOX 401, GREENWOOD, SC 29648-0401
PO BOX 402, GREENWOOD, SC 29648-0402
PO BOX 403, GREENWOOD, SC 29648-0403
PO BOX 404, GREENWOOD, SC 29648-0404
PO BOX 405, GREENWOOD, SC 29648-0405
PO BOX 406, GREENWOOD, SC 29648-0406
PO BOX 407, GREENWOOD, SC 29648-0407
PO BOX 408, GREENWOOD, SC 29648-0408
PO BOX 409, GREENWOOD, SC 29648-0409
PO BOX 410, GREENWOOD, SC 29648-0410
PO BOX 411, GREENWOOD, SC 29648-0411
PO BOX 412, GREENWOOD, SC 29648-0412
PO BOX 413, GREENWOOD, SC 29648-0413
PO BOX 414, GREENWOOD, SC 29648-0414
PO BOX 415, GREENWOOD, SC 29648-0415
PO BOX 416, GREENWOOD, SC 29648-0416
PO BOX 417, GREENWOOD, SC 29648-0417
PO BOX 418, GREENWOOD, SC 29648-0418
PO BOX 419, GREENWOOD, SC 29648-0419
PO BOX 420, GREENWOOD, SC 29648-0420
PO BOX 421, GREENWOOD, SC 29648-0421
PO BOX 422, GREENWOOD, SC 29648-0422
PO BOX 423, GREENWOOD, SC 29648-0423
PO BOX 424, GREENWOOD, SC 29648-0424
PO BOX 425, GREENWOOD, SC 29648-0425
PO BOX 426, GREENWOOD, SC 29648-0426
PO BOX 427, GREENWOOD, SC 29648-0427
PO BOX 428, GREENWOOD, SC 29648-0428
PO BOX 429, GREENWOOD, SC 29648-0429
PO BOX 430, GREENWOOD, SC 29648-0430
PO BOX 431, GREENWOOD, SC 29648-0431
PO BOX 432, GREENWOOD, SC 29648-0432
PO BOX 433, GREENWOOD, SC 29648-0433
PO BOX 434, GREENWOOD, SC 29648-0434
PO BOX 435, GREENWOOD, SC 29648-0435
PO BOX 436, GREENWOOD, SC 29648-0436
PO BOX 437, GREENWOOD, SC 29648-0437
PO BOX 438, GREENWOOD, SC 29648-0438
PO BOX 439, GREENWOOD, SC 29648-0439
PO BOX 440, GREENWOOD, SC 29648-0440
PO BOX 441, GREENWOOD, SC 29648-0441
PO BOX 442, GREENWOOD, SC 29648-0442
PO BOX 443, GREENWOOD, SC 29648-0443
PO BOX 444, GREENWOOD, SC 29648-0444
PO BOX 445, GREENWOOD, SC 29648-0445
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