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 421, WEST PALM BEACH, FL 33402-0421
PO BOX 422, WEST PALM BEACH, FL 33402-0422
PO BOX 423, WEST PALM BEACH, FL 33402-0423
PO BOX 424, WEST PALM BEACH, FL 33402-0424
PO BOX 425, WEST PALM BEACH, FL 33402-0425
PO BOX 426, WEST PALM BEACH, FL 33402-0426
PO BOX 427, WEST PALM BEACH, FL 33402-0427
PO BOX 428, WEST PALM BEACH, FL 33402-0428
PO BOX 429, WEST PALM BEACH, FL 33402-0429
PO BOX 430, WEST PALM BEACH, FL 33402-0430
PO BOX 431, WEST PALM BEACH, FL 33402-0431
PO BOX 432, WEST PALM BEACH, FL 33402-0432
PO BOX 433, WEST PALM BEACH, FL 33402-0433
PO BOX 434, WEST PALM BEACH, FL 33402-0434
PO BOX 435, WEST PALM BEACH, FL 33402-0435
PO BOX 436, WEST PALM BEACH, FL 33402-0436
PO BOX 437, WEST PALM BEACH, FL 33402-0437
PO BOX 438, WEST PALM BEACH, FL 33402-0438
PO BOX 439, WEST PALM BEACH, FL 33402-0439
PO BOX 440, WEST PALM BEACH, FL 33402-0440
PO BOX 441, WEST PALM BEACH, FL 33402-0441
PO BOX 442, WEST PALM BEACH, FL 33402-0442
PO BOX 443, WEST PALM BEACH, FL 33402-0443
PO BOX 444, WEST PALM BEACH, FL 33402-0444
PO BOX 445, WEST PALM BEACH, FL 33402-0445
PO BOX 446, WEST PALM BEACH, FL 33402-0446
PO BOX 447, WEST PALM BEACH, FL 33402-0447
PO BOX 448, WEST PALM BEACH, FL 33402-0448
PO BOX 449, WEST PALM BEACH, FL 33402-0449
PO BOX 450, WEST PALM BEACH, FL 33402-0450
PO BOX 451, WEST PALM BEACH, FL 33402-0451
PO BOX 452, WEST PALM BEACH, FL 33402-0452
PO BOX 453, WEST PALM BEACH, FL 33402-0453
PO BOX 454, WEST PALM BEACH, FL 33402-0454
PO BOX 455, WEST PALM BEACH, FL 33402-0455
PO BOX 456, WEST PALM BEACH, FL 33402-0456
PO BOX 457, WEST PALM BEACH, FL 33402-0457
PO BOX 458, WEST PALM BEACH, FL 33402-0458
PO BOX 459, WEST PALM BEACH, FL 33402-0459
PO BOX 460, WEST PALM BEACH, FL 33402-0460
PO BOX 461, WEST PALM BEACH, FL 33402-0461
PO BOX 462, WEST PALM BEACH, FL 33402-0462
PO BOX 463, WEST PALM BEACH, FL 33402-0463
PO BOX 464, WEST PALM BEACH, FL 33402-0464
PO BOX 465, WEST PALM BEACH, FL 33402-0465
PO BOX 466, WEST PALM BEACH, FL 33402-0466
PO BOX 467, WEST PALM BEACH, FL 33402-0467
PO BOX 468, WEST PALM BEACH, FL 33402-0468
PO BOX 469, WEST PALM BEACH, FL 33402-0469
PO BOX 470, WEST PALM BEACH, FL 33402-0470
PO BOX 471, WEST PALM BEACH, FL 33402-0471
PO BOX 472, WEST PALM BEACH, FL 33402-0472
PO BOX 473, WEST PALM BEACH, FL 33402-0473
PO BOX 474, WEST PALM BEACH, FL 33402-0474
PO BOX 475, WEST PALM BEACH, FL 33402-0475
PO BOX 476, WEST PALM BEACH, FL 33402-0476
PO BOX 477, WEST PALM BEACH, FL 33402-0477
PO BOX 478, WEST PALM BEACH, FL 33402-0478
PO BOX 479, WEST PALM BEACH, FL 33402-0479
PO BOX 480, WEST PALM BEACH, FL 33402-0480
PO BOX 481, WEST PALM BEACH, FL 33402-0481
PO BOX 482, WEST PALM BEACH, FL 33402-0482
PO BOX 483, WEST PALM BEACH, FL 33402-0483
PO BOX 484, WEST PALM BEACH, FL 33402-0484
PO BOX 485, WEST PALM BEACH, FL 33402-0485
PO BOX 486, WEST PALM BEACH, FL 33402-0486
PO BOX 487, WEST PALM BEACH, FL 33402-0487
PO BOX 488, WEST PALM BEACH, FL 33402-0488
PO BOX 489, WEST PALM BEACH, FL 33402-0489
PO BOX 490, WEST PALM BEACH, FL 33402-0490
PO BOX 491, WEST PALM BEACH, FL 33402-0491
PO BOX 492, WEST PALM BEACH, FL 33402-0492
PO BOX 493, WEST PALM BEACH, FL 33402-0493
PO BOX 494, WEST PALM BEACH, FL 33402-0494
PO BOX 495, WEST PALM BEACH, FL 33402-0495
PO BOX 496, WEST PALM BEACH, FL 33402-0496
PO BOX 497, WEST PALM BEACH, FL 33402-0497
PO BOX 498, WEST PALM BEACH, FL 33402-0498
PO BOX 499, WEST PALM BEACH, FL 33402-0499
PO BOX 500, WEST PALM BEACH, FL 33402-0500
PO BOX 501, WEST PALM BEACH, FL 33402-0501
PO BOX 502, WEST PALM BEACH, FL 33402-0502
PO BOX 503, WEST PALM BEACH, FL 33402-0503
PO BOX 504, WEST PALM BEACH, FL 33402-0504
PO BOX 505, WEST PALM BEACH, FL 33402-0505
PO BOX 506, WEST PALM BEACH, FL 33402-0506
PO BOX 507, WEST PALM BEACH, FL 33402-0507
PO BOX 508, WEST PALM BEACH, FL 33402-0508
PO BOX 509, WEST PALM BEACH, FL 33402-0509
PO BOX 510, WEST PALM BEACH, FL 33402-0510
PO BOX 511, WEST PALM BEACH, FL 33402-0511
PO BOX 512, WEST PALM BEACH, FL 33402-0512
PO BOX 513, WEST PALM BEACH, FL 33402-0513
PO BOX 514, WEST PALM BEACH, FL 33402-0514
PO BOX 515, WEST PALM BEACH, FL 33402-0515
PO BOX 516, WEST PALM BEACH, FL 33402-0516
PO BOX 517, WEST PALM BEACH, FL 33402-0517
PO BOX 518, WEST PALM BEACH, FL 33402-0518
PO BOX 519, WEST PALM BEACH, FL 33402-0519
PO BOX 520, WEST PALM BEACH, FL 33402-0520
PO BOX 521, WEST PALM BEACH, FL 33402-0521
PO BOX 522, WEST PALM BEACH, FL 33402-0522
PO BOX 523, WEST PALM BEACH, FL 33402-0523
PO BOX 524, WEST PALM BEACH, FL 33402-0524
PO BOX 525, WEST PALM BEACH, FL 33402-0525
PO BOX 526, WEST PALM BEACH, FL 33402-0526
PO BOX 527, WEST PALM BEACH, FL 33402-0527
PO BOX 528, WEST PALM BEACH, FL 33402-0528
PO BOX 529, WEST PALM BEACH, FL 33402-0529
PO BOX 530, WEST PALM BEACH, FL 33402-0530
PO BOX 531, WEST PALM BEACH, FL 33402-0531
PO BOX 532, WEST PALM BEACH, FL 33402-0532
PO BOX 533, WEST PALM BEACH, FL 33402-0533
PO BOX 534, WEST PALM BEACH, FL 33402-0534
PO BOX 535, WEST PALM BEACH, FL 33402-0535
PO BOX 536, WEST PALM BEACH, FL 33402-0536
Add new comment