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 331, CLANTON, AL 35046-0331
PO BOX 332, CLANTON, AL 35046-0332
PO BOX 333, CLANTON, AL 35046-0333
PO BOX 334, CLANTON, AL 35046-0334
PO BOX 335, CLANTON, AL 35046-0335
PO BOX 336, CLANTON, AL 35046-0336
PO BOX 337, CLANTON, AL 35046-0337
PO BOX 338, CLANTON, AL 35046-0338
PO BOX 339, CLANTON, AL 35046-0339
PO BOX 340, CLANTON, AL 35046-0340
PO BOX 341, CLANTON, AL 35046-0341
PO BOX 342, CLANTON, AL 35046-0342
PO BOX 343, CLANTON, AL 35046-0343
PO BOX 344, CLANTON, AL 35046-0344
PO BOX 345, CLANTON, AL 35046-0345
PO BOX 346, CLANTON, AL 35046-0346
PO BOX 347, CLANTON, AL 35046-0347
PO BOX 348, CLANTON, AL 35046-0348
PO BOX 349, CLANTON, AL 35046-0349
PO BOX 350, CLANTON, AL 35046-0350
PO BOX 351, CLANTON, AL 35046-0351
PO BOX 352, CLANTON, AL 35046-0352
PO BOX 353, CLANTON, AL 35046-0353
PO BOX 354, CLANTON, AL 35046-0354
PO BOX 355, CLANTON, AL 35046-0355
PO BOX 356, CLANTON, AL 35046-0356
PO BOX 357, CLANTON, AL 35046-0357
PO BOX 358, CLANTON, AL 35046-0358
PO BOX 359, CLANTON, AL 35046-0359
PO BOX 360, CLANTON, AL 35046-0360
PO BOX 361, CLANTON, AL 35046-0361
PO BOX 362, CLANTON, AL 35046-0362
PO BOX 363, CLANTON, AL 35046-0363
PO BOX 364, CLANTON, AL 35046-0364
PO BOX 365, CLANTON, AL 35046-0365
PO BOX 366, CLANTON, AL 35046-0366
PO BOX 367, CLANTON, AL 35046-0367
PO BOX 368, CLANTON, AL 35046-0368
PO BOX 369, CLANTON, AL 35046-0369
PO BOX 370, CLANTON, AL 35046-0370
PO BOX 371, CLANTON, AL 35046-0371
PO BOX 372, CLANTON, AL 35046-0372
PO BOX 373, CLANTON, AL 35046-0373
PO BOX 374, CLANTON, AL 35046-0374
PO BOX 375, CLANTON, AL 35046-0375
PO BOX 376, CLANTON, AL 35046-0376
PO BOX 377, CLANTON, AL 35046-0377
PO BOX 378, CLANTON, AL 35046-0378
PO BOX 379, CLANTON, AL 35046-0379
PO BOX 380, CLANTON, AL 35046-0380
PO BOX 381, CLANTON, AL 35046-0381
PO BOX 382, CLANTON, AL 35046-0382
PO BOX 383, CLANTON, AL 35046-0383
PO BOX 384, CLANTON, AL 35046-0384
PO BOX 385, CLANTON, AL 35046-0385
PO BOX 386, CLANTON, AL 35046-0386
PO BOX 387, CLANTON, AL 35046-0387
PO BOX 388, CLANTON, AL 35046-0388
PO BOX 389, CLANTON, AL 35046-0389
PO BOX 390, CLANTON, AL 35046-0390
PO BOX 391, CLANTON, AL 35046-0391
PO BOX 392, CLANTON, AL 35046-0392
PO BOX 393, CLANTON, AL 35046-0393
PO BOX 394, CLANTON, AL 35046-0394
PO BOX 395, CLANTON, AL 35046-0395
PO BOX 396, CLANTON, AL 35046-0396
PO BOX 397, CLANTON, AL 35046-0397
PO BOX 398, CLANTON, AL 35046-0398
PO BOX 399, CLANTON, AL 35046-0399
PO BOX 400, CLANTON, AL 35046-0400
PO BOX 401, CLANTON, AL 35046-0401
PO BOX 402, CLANTON, AL 35046-0402
PO BOX 403, CLANTON, AL 35046-0403
PO BOX 404, CLANTON, AL 35046-0404
PO BOX 405, CLANTON, AL 35046-0405
PO BOX 406, CLANTON, AL 35046-0406
PO BOX 407, CLANTON, AL 35046-0407
PO BOX 408, CLANTON, AL 35046-0408
PO BOX 409, CLANTON, AL 35046-0409
PO BOX 410, CLANTON, AL 35046-0410
PO BOX 411, CLANTON, AL 35046-0411
PO BOX 412, CLANTON, AL 35046-0412
PO BOX 413, CLANTON, AL 35046-0413
PO BOX 414, CLANTON, AL 35046-0414
PO BOX 415, CLANTON, AL 35046-0415
PO BOX 416, CLANTON, AL 35046-0416
PO BOX 417, CLANTON, AL 35046-0417
PO BOX 418, CLANTON, AL 35046-0418
PO BOX 419, CLANTON, AL 35046-0419
PO BOX 420, CLANTON, AL 35046-0420
PO BOX 421, CLANTON, AL 35046-0421
PO BOX 422, CLANTON, AL 35046-0422
PO BOX 423, CLANTON, AL 35046-0423
PO BOX 424, CLANTON, AL 35046-0424
PO BOX 425, CLANTON, AL 35046-0425
PO BOX 426, CLANTON, AL 35046-0426
PO BOX 427, CLANTON, AL 35046-0427
PO BOX 428, CLANTON, AL 35046-0428
PO BOX 429, CLANTON, AL 35046-0429
PO BOX 430, CLANTON, AL 35046-0430
PO BOX 431, CLANTON, AL 35046-0431
PO BOX 432, CLANTON, AL 35046-0432
PO BOX 433, CLANTON, AL 35046-0433
PO BOX 434, CLANTON, AL 35046-0434
PO BOX 435, CLANTON, AL 35046-0435
PO BOX 436, CLANTON, AL 35046-0436
PO BOX 437, CLANTON, AL 35046-0437
PO BOX 438, CLANTON, AL 35046-0438
PO BOX 439, CLANTON, AL 35046-0439
PO BOX 440, CLANTON, AL 35046-0440
PO BOX 441, CLANTON, AL 35046-0441
PO BOX 442, CLANTON, AL 35046-0442
PO BOX 443, CLANTON, AL 35046-0443
PO BOX 444, CLANTON, AL 35046-0444
PO BOX 445, CLANTON, AL 35046-0445
PO BOX 446, CLANTON, AL 35046-0446
PO BOX 447, CLANTON, AL 35046-0447
PO BOX 448, CLANTON, AL 35046-0448
PO BOX 449, CLANTON, AL 35046-0449
PO BOX 450, CLANTON, AL 35046-0450
PO BOX 451, CLANTON, AL 35046-0451
PO BOX 452, CLANTON, AL 35046-0452
PO BOX 453, CLANTON, AL 35046-0453
PO BOX 454, CLANTON, AL 35046-0454
PO BOX 455, CLANTON, AL 35046-0455
PO BOX 456, CLANTON, AL 35046-0456
PO BOX 457, CLANTON, AL 35046-0457
PO BOX 458, CLANTON, AL 35046-0458
PO BOX 459, CLANTON, AL 35046-0459
PO BOX 460, CLANTON, AL 35046-0460
PO BOX 461, CLANTON, AL 35046-0461
PO BOX 462, CLANTON, AL 35046-0462
PO BOX 463, CLANTON, AL 35046-0463
PO BOX 464, CLANTON, AL 35046-0464
PO BOX 465, CLANTON, AL 35046-0465
PO BOX 466, CLANTON, AL 35046-0466
PO BOX 467, CLANTON, AL 35046-0467
PO BOX 468, CLANTON, AL 35046-0468
PO BOX 469, CLANTON, AL 35046-0469
PO BOX 470, CLANTON, AL 35046-0470
PO BOX 471, CLANTON, AL 35046-0471
PO BOX 472, CLANTON, AL 35046-0472
PO BOX 473, CLANTON, AL 35046-0473
PO BOX 474, CLANTON, AL 35046-0474
PO BOX 475, CLANTON, AL 35046-0475
PO BOX 476, CLANTON, AL 35046-0476
PO BOX 477, CLANTON, AL 35046-0477
PO BOX 478, CLANTON, AL 35046-0478
PO BOX 479, CLANTON, AL 35046-0479
PO BOX 480, CLANTON, AL 35046-0480
PO BOX 481, CLANTON, AL 35046-0481
PO BOX 482, CLANTON, AL 35046-0482
PO BOX 483, CLANTON, AL 35046-0483
PO BOX 484, CLANTON, AL 35046-0484
PO BOX 485, CLANTON, AL 35046-0485
PO BOX 486, CLANTON, AL 35046-0486
PO BOX 487, CLANTON, AL 35046-0487
PO BOX 488, CLANTON, AL 35046-0488
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