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 441, PHILIPSBURG, PA 16866-0441
PO BOX 442, PHILIPSBURG, PA 16866-0442
PO BOX 443, PHILIPSBURG, PA 16866-0443
PO BOX 444, PHILIPSBURG, PA 16866-0444
PO BOX 445, PHILIPSBURG, PA 16866-0445
PO BOX 446, PHILIPSBURG, PA 16866-0446
PO BOX 447, PHILIPSBURG, PA 16866-0447
PO BOX 448, PHILIPSBURG, PA 16866-0448
PO BOX 449, PHILIPSBURG, PA 16866-0449
PO BOX 450, PHILIPSBURG, PA 16866-0450
PO BOX 451, PHILIPSBURG, PA 16866-0451
PO BOX 452, PHILIPSBURG, PA 16866-0452
PO BOX 453, PHILIPSBURG, PA 16866-0453
PO BOX 454, PHILIPSBURG, PA 16866-0454
PO BOX 455, PHILIPSBURG, PA 16866-0455
PO BOX 456, PHILIPSBURG, PA 16866-0456
PO BOX 457, PHILIPSBURG, PA 16866-0457
PO BOX 458, PHILIPSBURG, PA 16866-0458
PO BOX 459, PHILIPSBURG, PA 16866-0459
PO BOX 460, PHILIPSBURG, PA 16866-0460
PO BOX 461, PHILIPSBURG, PA 16866-0461
PO BOX 462, PHILIPSBURG, PA 16866-0462
PO BOX 463, PHILIPSBURG, PA 16866-0463
PO BOX 464, PHILIPSBURG, PA 16866-0464
PO BOX 465, PHILIPSBURG, PA 16866-0465
PO BOX 466, PHILIPSBURG, PA 16866-0466
PO BOX 467, PHILIPSBURG, PA 16866-0467
PO BOX 468, PHILIPSBURG, PA 16866-0468
PO BOX 469, PHILIPSBURG, PA 16866-0469
PO BOX 470, PHILIPSBURG, PA 16866-0470
PO BOX 471, PHILIPSBURG, PA 16866-0471
PO BOX 472, PHILIPSBURG, PA 16866-0472
PO BOX 473, PHILIPSBURG, PA 16866-0473
PO BOX 474, PHILIPSBURG, PA 16866-0474
PO BOX 475, PHILIPSBURG, PA 16866-0475
PO BOX 476, PHILIPSBURG, PA 16866-0476
PO BOX 477, PHILIPSBURG, PA 16866-0477
PO BOX 478, PHILIPSBURG, PA 16866-0478
PO BOX 479, PHILIPSBURG, PA 16866-0479
PO BOX 480, PHILIPSBURG, PA 16866-0480
PO BOX 481, PHILIPSBURG, PA 16866-0481
PO BOX 482, PHILIPSBURG, PA 16866-0482
PO BOX 483, PHILIPSBURG, PA 16866-0483
PO BOX 484, PHILIPSBURG, PA 16866-0484
PO BOX 485, PHILIPSBURG, PA 16866-0485
PO BOX 486, PHILIPSBURG, PA 16866-0486
PO BOX 487, PHILIPSBURG, PA 16866-0487
PO BOX 488, PHILIPSBURG, PA 16866-0488
PO BOX 489, PHILIPSBURG, PA 16866-0489
PO BOX 490, PHILIPSBURG, PA 16866-0490
PO BOX 491, PHILIPSBURG, PA 16866-0491
PO BOX 492, PHILIPSBURG, PA 16866-0492
PO BOX 493, PHILIPSBURG, PA 16866-0493
PO BOX 494, PHILIPSBURG, PA 16866-0494
PO BOX 495, PHILIPSBURG, PA 16866-0495
PO BOX 496, PHILIPSBURG, PA 16866-0496
PO BOX 497, PHILIPSBURG, PA 16866-0497
PO BOX 498, PHILIPSBURG, PA 16866-0498
PO BOX 499, PHILIPSBURG, PA 16866-0499
PO BOX 500, PHILIPSBURG, PA 16866-0500
PO BOX 501, PHILIPSBURG, PA 16866-0501
PO BOX 502, PHILIPSBURG, PA 16866-0502
PO BOX 503, PHILIPSBURG, PA 16866-0503
PO BOX 504, PHILIPSBURG, PA 16866-0504
PO BOX 505, PHILIPSBURG, PA 16866-0505
PO BOX 506, PHILIPSBURG, PA 16866-0506
PO BOX 507, PHILIPSBURG, PA 16866-0507
PO BOX 508, PHILIPSBURG, PA 16866-0508
PO BOX 509, PHILIPSBURG, PA 16866-0509
PO BOX 510, PHILIPSBURG, PA 16866-0510
PO BOX 511, PHILIPSBURG, PA 16866-0511
PO BOX 512, PHILIPSBURG, PA 16866-0512
PO BOX 513, PHILIPSBURG, PA 16866-0513
PO BOX 514, PHILIPSBURG, PA 16866-0514
PO BOX 515, PHILIPSBURG, PA 16866-0515
PO BOX 516, PHILIPSBURG, PA 16866-0516
PO BOX 517, PHILIPSBURG, PA 16866-0517
PO BOX 518, PHILIPSBURG, PA 16866-0518
PO BOX 519, PHILIPSBURG, PA 16866-0519
PO BOX 520, PHILIPSBURG, PA 16866-0520
PO BOX 521, PHILIPSBURG, PA 16866-0521
PO BOX 522, PHILIPSBURG, PA 16866-0522
PO BOX 523, PHILIPSBURG, PA 16866-0523
PO BOX 524, PHILIPSBURG, PA 16866-0524
PO BOX 525, PHILIPSBURG, PA 16866-0525
PO BOX 526, PHILIPSBURG, PA 16866-0526
PO BOX 527, PHILIPSBURG, PA 16866-0527
PO BOX 528, PHILIPSBURG, PA 16866-0528
PO BOX 529, PHILIPSBURG, PA 16866-0529
PO BOX 530, PHILIPSBURG, PA 16866-0530
PO BOX 531, PHILIPSBURG, PA 16866-0531
PO BOX 532, PHILIPSBURG, PA 16866-0532
PO BOX 533, PHILIPSBURG, PA 16866-0533
PO BOX 534, PHILIPSBURG, PA 16866-0534
PO BOX 535, PHILIPSBURG, PA 16866-0535
PO BOX 536, PHILIPSBURG, PA 16866-0536
PO BOX 537, PHILIPSBURG, PA 16866-0537
PO BOX 538, PHILIPSBURG, PA 16866-0538
PO BOX 539, PHILIPSBURG, PA 16866-0539
PO BOX 540, PHILIPSBURG, PA 16866-0540
PO BOX 541, PHILIPSBURG, PA 16866-0541
PO BOX 542, PHILIPSBURG, PA 16866-0542
PO BOX 543, PHILIPSBURG, PA 16866-0543
PO BOX 544, PHILIPSBURG, PA 16866-0544
PO BOX 545, PHILIPSBURG, PA 16866-0545
PO BOX 546, PHILIPSBURG, PA 16866-0546
PO BOX 547, PHILIPSBURG, PA 16866-0547
PO BOX 548, PHILIPSBURG, PA 16866-0548
PO BOX 549, PHILIPSBURG, PA 16866-0549
PO BOX 550, PHILIPSBURG, PA 16866-0550
PO BOX 551, PHILIPSBURG, PA 16866-0551
PO BOX 552, PHILIPSBURG, PA 16866-0552
PO BOX 553, PHILIPSBURG, PA 16866-0553
PO BOX 554, PHILIPSBURG, PA 16866-0554
PO BOX 555, PHILIPSBURG, PA 16866-0555
PO BOX 556, PHILIPSBURG, PA 16866-0556
PO BOX 557, PHILIPSBURG, PA 16866-0557
PO BOX 558, PHILIPSBURG, PA 16866-0558
PO BOX 559, PHILIPSBURG, PA 16866-0559
PO BOX 560, PHILIPSBURG, PA 16866-0560
PO BOX 561, PHILIPSBURG, PA 16866-0561
PO BOX 562, PHILIPSBURG, PA 16866-0562
PO BOX 563, PHILIPSBURG, PA 16866-0563
PO BOX 564, PHILIPSBURG, PA 16866-0564
PO BOX 565, PHILIPSBURG, PA 16866-0565
PO BOX 566, PHILIPSBURG, PA 16866-0566
PO BOX 567, PHILIPSBURG, PA 16866-0567
PO BOX 568, PHILIPSBURG, PA 16866-0568
PO BOX 569, PHILIPSBURG, PA 16866-0569
PO BOX 570, PHILIPSBURG, PA 16866-0570
PO BOX 571, PHILIPSBURG, PA 16866-0571
PO BOX 572, PHILIPSBURG, PA 16866-0572
PO BOX 573, PHILIPSBURG, PA 16866-0573
PO BOX 574, PHILIPSBURG, PA 16866-0574
PO BOX 575, PHILIPSBURG, PA 16866-0575
PO BOX 576, PHILIPSBURG, PA 16866-0576
PO BOX 577, PHILIPSBURG, PA 16866-0577
PO BOX 578, PHILIPSBURG, PA 16866-0578
PO BOX 579, PHILIPSBURG, PA 16866-0579
PO BOX 580, PHILIPSBURG, PA 16866-0580
PO BOX 581, PHILIPSBURG, PA 16866-0581
PO BOX 582, PHILIPSBURG, PA 16866-0582
PO BOX 583, PHILIPSBURG, PA 16866-0583
PO BOX 584, PHILIPSBURG, PA 16866-0584
PO BOX 585, PHILIPSBURG, PA 16866-0585
PO BOX 586, PHILIPSBURG, PA 16866-0586
PO BOX 587, PHILIPSBURG, PA 16866-0587
PO BOX 588, PHILIPSBURG, PA 16866-0588
PO BOX 589, PHILIPSBURG, PA 16866-0589
PO BOX 590, PHILIPSBURG, PA 16866-0590
PO BOX 591, PHILIPSBURG, PA 16866-0591
PO BOX 592, PHILIPSBURG, PA 16866-0592
PO BOX 593, PHILIPSBURG, PA 16866-0593
PO BOX 594, PHILIPSBURG, PA 16866-0594
PO BOX 595, PHILIPSBURG, PA 16866-0595
PO BOX 596, PHILIPSBURG, PA 16866-0596
PO BOX 597, PHILIPSBURG, PA 16866-0597
PO BOX 598, PHILIPSBURG, PA 16866-0598
PO BOX 599, PHILIPSBURG, PA 16866-0599
PO BOX 600, PHILIPSBURG, PA 16866-0600
PO BOX 601, PHILIPSBURG, PA 16866-0601
PO BOX 602, PHILIPSBURG, PA 16866-0602
PO BOX 603, PHILIPSBURG, PA 16866-0603
PO BOX 604, PHILIPSBURG, PA 16866-0604
PO BOX 605, PHILIPSBURG, PA 16866-0605
PO BOX 606, PHILIPSBURG, PA 16866-0606
PO BOX 607, PHILIPSBURG, PA 16866-0607
PO BOX 608, PHILIPSBURG, PA 16866-0608
PO BOX 609, PHILIPSBURG, PA 16866-0609
PO BOX 610, PHILIPSBURG, PA 16866-0610
PO BOX 611, PHILIPSBURG, PA 16866-0611
PO BOX 612, PHILIPSBURG, PA 16866-0612
PO BOX 613, PHILIPSBURG, PA 16866-0613
PO BOX 614, PHILIPSBURG, PA 16866-0614
PO BOX 615, PHILIPSBURG, PA 16866-0615
PO BOX 616, PHILIPSBURG, PA 16866-0616
PO BOX 617, PHILIPSBURG, PA 16866-0617
PO BOX 618, PHILIPSBURG, PA 16866-0618
PO BOX 619, PHILIPSBURG, PA 16866-0619
PO BOX 620, PHILIPSBURG, PA 16866-0620
PO BOX 621, PHILIPSBURG, PA 16866-0621
PO BOX 622, PHILIPSBURG, PA 16866-0622
PO BOX 623, PHILIPSBURG, PA 16866-0623
PO BOX 624, PHILIPSBURG, PA 16866-0624
PO BOX 625, PHILIPSBURG, PA 16866-0625
PO BOX 626, PHILIPSBURG, PA 16866-0626
PO BOX 627, PHILIPSBURG, PA 16866-0627
PO BOX 628, PHILIPSBURG, PA 16866-0628
PO BOX 629, PHILIPSBURG, PA 16866-0629
PO BOX 630, PHILIPSBURG, PA 16866-0630
PO BOX 631, PHILIPSBURG, PA 16866-0631
PO BOX 632, PHILIPSBURG, PA 16866-0632
PO BOX 633, PHILIPSBURG, PA 16866-0633
PO BOX 634, PHILIPSBURG, PA 16866-0634
PO BOX 635, PHILIPSBURG, PA 16866-0635
PO BOX 636, PHILIPSBURG, PA 16866-0636
PO BOX 637, PHILIPSBURG, PA 16866-0637
PO BOX 638, PHILIPSBURG, PA 16866-0638
PO BOX 639, PHILIPSBURG, PA 16866-0639
PO BOX 640, PHILIPSBURG, PA 16866-0640
PO BOX 641, PHILIPSBURG, PA 16866-0641
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