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 541, SUPPLY, NC 28462-0541
PO BOX 542, SUPPLY, NC 28462-0542
PO BOX 543, SUPPLY, NC 28462-0543
PO BOX 544, SUPPLY, NC 28462-0544
PO BOX 545, SUPPLY, NC 28462-0545
PO BOX 546, SUPPLY, NC 28462-0546
PO BOX 547, SUPPLY, NC 28462-0547
PO BOX 548, SUPPLY, NC 28462-0548
PO BOX 549, SUPPLY, NC 28462-0549
PO BOX 550, SUPPLY, NC 28462-0550
PO BOX 551, SUPPLY, NC 28462-0551
PO BOX 552, SUPPLY, NC 28462-0552
PO BOX 553, SUPPLY, NC 28462-0553
PO BOX 554, SUPPLY, NC 28462-0554
PO BOX 555, SUPPLY, NC 28462-0555
PO BOX 556, SUPPLY, NC 28462-0556
PO BOX 557, SUPPLY, NC 28462-0557
PO BOX 558, SUPPLY, NC 28462-0558
PO BOX 559, SUPPLY, NC 28462-0559
PO BOX 560, SUPPLY, NC 28462-0560
PO BOX 561, SUPPLY, NC 28462-0561
PO BOX 562, SUPPLY, NC 28462-0562
PO BOX 563, SUPPLY, NC 28462-0563
PO BOX 564, SUPPLY, NC 28462-0564
PO BOX 565, SUPPLY, NC 28462-0565
PO BOX 566, SUPPLY, NC 28462-0566
PO BOX 567, SUPPLY, NC 28462-0567
PO BOX 568, SUPPLY, NC 28462-0568
PO BOX 569, SUPPLY, NC 28462-0569
PO BOX 570, SUPPLY, NC 28462-0570
PO BOX 571, SUPPLY, NC 28462-0571
PO BOX 572, SUPPLY, NC 28462-0572
PO BOX 573, SUPPLY, NC 28462-0573
PO BOX 574, SUPPLY, NC 28462-0574
PO BOX 575, SUPPLY, NC 28462-0575
PO BOX 576, SUPPLY, NC 28462-0576
PO BOX 577, SUPPLY, NC 28462-0577
PO BOX 578, SUPPLY, NC 28462-0578
PO BOX 579, SUPPLY, NC 28462-0579
PO BOX 580, SUPPLY, NC 28462-0580
PO BOX 581, SUPPLY, NC 28462-0581
PO BOX 582, SUPPLY, NC 28462-0582
PO BOX 583, SUPPLY, NC 28462-0583
PO BOX 584, SUPPLY, NC 28462-0584
PO BOX 585, SUPPLY, NC 28462-0585
PO BOX 586, SUPPLY, NC 28462-0586
PO BOX 587, SUPPLY, NC 28462-0587
PO BOX 588, SUPPLY, NC 28462-0588
PO BOX 589, SUPPLY, NC 28462-0589
PO BOX 590, SUPPLY, NC 28462-0590
PO BOX 591, SUPPLY, NC 28462-0591
PO BOX 592, SUPPLY, NC 28462-0592
PO BOX 593, SUPPLY, NC 28462-0593
PO BOX 594, SUPPLY, NC 28462-0594
PO BOX 595, SUPPLY, NC 28462-0595
PO BOX 596, SUPPLY, NC 28462-0596
PO BOX 597, SUPPLY, NC 28462-0597
PO BOX 598, SUPPLY, NC 28462-0598
PO BOX 599, SUPPLY, NC 28462-0599
PO BOX 600, SUPPLY, NC 28462-0600
PO BOX 601, SUPPLY, NC 28462-0601
PO BOX 602, SUPPLY, NC 28462-0602
PO BOX 603, SUPPLY, NC 28462-0603
PO BOX 604, SUPPLY, NC 28462-0604
PO BOX 605, SUPPLY, NC 28462-0605
PO BOX 606, SUPPLY, NC 28462-0606
PO BOX 607, SUPPLY, NC 28462-0607
PO BOX 608, SUPPLY, NC 28462-0608
PO BOX 609, SUPPLY, NC 28462-0609
PO BOX 610, SUPPLY, NC 28462-0610
PO BOX 611, SUPPLY, NC 28462-0611
PO BOX 612, SUPPLY, NC 28462-0612
PO BOX 613, SUPPLY, NC 28462-0613
PO BOX 614, SUPPLY, NC 28462-0614
PO BOX 615, SUPPLY, NC 28462-0615
PO BOX 616, SUPPLY, NC 28462-0616
PO BOX 617, SUPPLY, NC 28462-0617
PO BOX 618, SUPPLY, NC 28462-0618
PO BOX 619, SUPPLY, NC 28462-0619
PO BOX 620, SUPPLY, NC 28462-0620
PO BOX 621, SUPPLY, NC 28462-0621
PO BOX 622, SUPPLY, NC 28462-0622
PO BOX 623, SUPPLY, NC 28462-0623
PO BOX 624, SUPPLY, NC 28462-0624
PO BOX 625, SUPPLY, NC 28462-0625
PO BOX 626, SUPPLY, NC 28462-0626
PO BOX 627, SUPPLY, NC 28462-0627
PO BOX 628, SUPPLY, NC 28462-0628
PO BOX 629, SUPPLY, NC 28462-0629
PO BOX 630, SUPPLY, NC 28462-0630
PO BOX 631, SUPPLY, NC 28462-0631
PO BOX 632, SUPPLY, NC 28462-0632
PO BOX 633, SUPPLY, NC 28462-0633
PO BOX 634, SUPPLY, NC 28462-0634
PO BOX 635, SUPPLY, NC 28462-0635
PO BOX 636, SUPPLY, NC 28462-0636
PO BOX 637, SUPPLY, NC 28462-0637
PO BOX 638, SUPPLY, NC 28462-0638
PO BOX 639, SUPPLY, NC 28462-0639
PO BOX 640, SUPPLY, NC 28462-0640
PO BOX 641, SUPPLY, NC 28462-0641
PO BOX 642, SUPPLY, NC 28462-0642
PO BOX 643, SUPPLY, NC 28462-0643
PO BOX 644, SUPPLY, NC 28462-0644
PO BOX 645, SUPPLY, NC 28462-0645
PO BOX 646, SUPPLY, NC 28462-0646
PO BOX 647, SUPPLY, NC 28462-0647
PO BOX 648, SUPPLY, NC 28462-0648
PO BOX 649, SUPPLY, NC 28462-0649
PO BOX 650, SUPPLY, NC 28462-0650
PO BOX 651, SUPPLY, NC 28462-0651
PO BOX 652, SUPPLY, NC 28462-0652
PO BOX 653, SUPPLY, NC 28462-0653
PO BOX 654, SUPPLY, NC 28462-0654
PO BOX 655, SUPPLY, NC 28462-0655
PO BOX 656, SUPPLY, NC 28462-0656
PO BOX 657, SUPPLY, NC 28462-0657
PO BOX 658, SUPPLY, NC 28462-0658
PO BOX 659, SUPPLY, NC 28462-0659
PO BOX 660, SUPPLY, NC 28462-0660
PO BOX 661, SUPPLY, NC 28462-0661
PO BOX 662, SUPPLY, NC 28462-0662
PO BOX 663, SUPPLY, NC 28462-0663
PO BOX 664, SUPPLY, NC 28462-0664
PO BOX 665, SUPPLY, NC 28462-0665
PO BOX 666, SUPPLY, NC 28462-0666
PO BOX 667, SUPPLY, NC 28462-0667
PO BOX 668, SUPPLY, NC 28462-0668
PO BOX 669, SUPPLY, NC 28462-0669
PO BOX 670, SUPPLY, NC 28462-0670
PO BOX 671, SUPPLY, NC 28462-0671
PO BOX 672, SUPPLY, NC 28462-0672
PO BOX 673, SUPPLY, NC 28462-0673
PO BOX 674, SUPPLY, NC 28462-0674
PO BOX 675, SUPPLY, NC 28462-0675
PO BOX 676, SUPPLY, NC 28462-0676
PO BOX 677, SUPPLY, NC 28462-0677
PO BOX 678, SUPPLY, NC 28462-0678
PO BOX 679, SUPPLY, NC 28462-0679
PO BOX 680, SUPPLY, NC 28462-0680
PO BOX 681, SUPPLY, NC 28462-0681
PO BOX 682, SUPPLY, NC 28462-0682
PO BOX 683, SUPPLY, NC 28462-0683
PO BOX 684, SUPPLY, NC 28462-0684
PO BOX 685, SUPPLY, NC 28462-0685
PO BOX 686, SUPPLY, NC 28462-0686
PO BOX 687, SUPPLY, NC 28462-0687
PO BOX 688, SUPPLY, NC 28462-0688
PO BOX 689, SUPPLY, NC 28462-0689
PO BOX 690, SUPPLY, NC 28462-0690
PO BOX 691, SUPPLY, NC 28462-0691
PO BOX 692, SUPPLY, NC 28462-0692
PO BOX 693, SUPPLY, NC 28462-0693
PO BOX 694, SUPPLY, NC 28462-0694
PO BOX 695, SUPPLY, NC 28462-0695
PO BOX 696, SUPPLY, NC 28462-0696
PO BOX 697, SUPPLY, NC 28462-0697
PO BOX 698, SUPPLY, NC 28462-0698
PO BOX 699, SUPPLY, NC 28462-0699
PO BOX 700, SUPPLY, NC 28462-0700
PO BOX 701, SUPPLY, NC 28462-0701
PO BOX 702, SUPPLY, NC 28462-0702
PO BOX 703, SUPPLY, NC 28462-0703
PO BOX 704, SUPPLY, NC 28462-0704
PO BOX 705, SUPPLY, NC 28462-0705
PO BOX 706, SUPPLY, NC 28462-0706
PO BOX 707, SUPPLY, NC 28462-0707
PO BOX 708, SUPPLY, NC 28462-0708
PO BOX 709, SUPPLY, NC 28462-0709
PO BOX 710, SUPPLY, NC 28462-0710
PO BOX 711, SUPPLY, NC 28462-0711
PO BOX 712, SUPPLY, NC 28462-0712
PO BOX 713, SUPPLY, NC 28462-0713
PO BOX 714, SUPPLY, NC 28462-0714
PO BOX 715, SUPPLY, NC 28462-0715
PO BOX 716, SUPPLY, NC 28462-0716
PO BOX 717, SUPPLY, NC 28462-0717
PO BOX 718, SUPPLY, NC 28462-0718
PO BOX 719, SUPPLY, NC 28462-0719
PO BOX 720, SUPPLY, NC 28462-0720
PO BOX 721, SUPPLY, NC 28462-0721
PO BOX 722, SUPPLY, NC 28462-0722
PO BOX 723, SUPPLY, NC 28462-0723
PO BOX 724, SUPPLY, NC 28462-0724
PO BOX 725, SUPPLY, NC 28462-0725
PO BOX 726, SUPPLY, NC 28462-0726
PO BOX 727, SUPPLY, NC 28462-0727
PO BOX 728, SUPPLY, NC 28462-0728
PO BOX 729, SUPPLY, NC 28462-0729
PO BOX 730, SUPPLY, NC 28462-0730
PO BOX 731, SUPPLY, NC 28462-0731
PO BOX 732, SUPPLY, NC 28462-0732
PO BOX 733, SUPPLY, NC 28462-0733
PO BOX 734, SUPPLY, NC 28462-0734
PO BOX 735, SUPPLY, NC 28462-0735
PO BOX 736, SUPPLY, NC 28462-0736
PO BOX 737, SUPPLY, NC 28462-0737
PO BOX 738, SUPPLY, NC 28462-0738
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