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 641, LAKE WORTH BEACH, FL 33460-0641
PO BOX 642, LAKE WORTH BEACH, FL 33460-0642
PO BOX 643, LAKE WORTH BEACH, FL 33460-0643
PO BOX 644, LAKE WORTH BEACH, FL 33460-0644
PO BOX 645, LAKE WORTH BEACH, FL 33460-0645
PO BOX 646, LAKE WORTH BEACH, FL 33460-0646
PO BOX 647, LAKE WORTH BEACH, FL 33460-0647
PO BOX 648, LAKE WORTH BEACH, FL 33460-0648
PO BOX 649, LAKE WORTH BEACH, FL 33460-0649
PO BOX 650, LAKE WORTH BEACH, FL 33460-0650
PO BOX 651, LAKE WORTH BEACH, FL 33460-0651
PO BOX 652, LAKE WORTH BEACH, FL 33460-0652
PO BOX 653, LAKE WORTH BEACH, FL 33460-0653
PO BOX 654, LAKE WORTH BEACH, FL 33460-0654
PO BOX 655, LAKE WORTH BEACH, FL 33460-0655
PO BOX 656, LAKE WORTH BEACH, FL 33460-0656
PO BOX 657, LAKE WORTH BEACH, FL 33460-0657
PO BOX 658, LAKE WORTH BEACH, FL 33460-0658
PO BOX 659, LAKE WORTH BEACH, FL 33460-0659
PO BOX 660, LAKE WORTH BEACH, FL 33460-0660
PO BOX 661, LAKE WORTH BEACH, FL 33460-0661
PO BOX 662, LAKE WORTH BEACH, FL 33460-0662
PO BOX 663, LAKE WORTH BEACH, FL 33460-0663
PO BOX 664, LAKE WORTH BEACH, FL 33460-0664
PO BOX 665, LAKE WORTH BEACH, FL 33460-0665
PO BOX 666, LAKE WORTH BEACH, FL 33460-0666
PO BOX 667, LAKE WORTH BEACH, FL 33460-0667
PO BOX 668, LAKE WORTH BEACH, FL 33460-0668
PO BOX 669, LAKE WORTH BEACH, FL 33460-0669
PO BOX 670, LAKE WORTH BEACH, FL 33460-0670
PO BOX 671, LAKE WORTH BEACH, FL 33460-0671
PO BOX 672, LAKE WORTH BEACH, FL 33460-0672
PO BOX 673, LAKE WORTH BEACH, FL 33460-0673
PO BOX 674, LAKE WORTH BEACH, FL 33460-0674
PO BOX 675, LAKE WORTH BEACH, FL 33460-0675
PO BOX 676, LAKE WORTH BEACH, FL 33460-0676
PO BOX 677, LAKE WORTH BEACH, FL 33460-0677
PO BOX 678, LAKE WORTH BEACH, FL 33460-0678
PO BOX 679, LAKE WORTH BEACH, FL 33460-0679
PO BOX 680, LAKE WORTH BEACH, FL 33460-0680
PO BOX 681, LAKE WORTH BEACH, FL 33460-0681
PO BOX 682, LAKE WORTH BEACH, FL 33460-0682
PO BOX 683, LAKE WORTH BEACH, FL 33460-0683
PO BOX 684, LAKE WORTH BEACH, FL 33460-0684
PO BOX 685, LAKE WORTH BEACH, FL 33460-0685
PO BOX 686, LAKE WORTH BEACH, FL 33460-0686
PO BOX 687, LAKE WORTH BEACH, FL 33460-0687
PO BOX 688, LAKE WORTH BEACH, FL 33460-0688
PO BOX 689, LAKE WORTH BEACH, FL 33460-0689
PO BOX 690, LAKE WORTH BEACH, FL 33460-0690
PO BOX 691, LAKE WORTH BEACH, FL 33460-0691
PO BOX 692, LAKE WORTH BEACH, FL 33460-0692
PO BOX 693, LAKE WORTH BEACH, FL 33460-0693
PO BOX 694, LAKE WORTH BEACH, FL 33460-0694
PO BOX 695, LAKE WORTH BEACH, FL 33460-0695
PO BOX 696, LAKE WORTH BEACH, FL 33460-0696
PO BOX 697, LAKE WORTH BEACH, FL 33460-0697
PO BOX 698, LAKE WORTH BEACH, FL 33460-0698
PO BOX 699, LAKE WORTH BEACH, FL 33460-0699
PO BOX 700, LAKE WORTH BEACH, FL 33460-0700
PO BOX 701, LAKE WORTH BEACH, FL 33460-0701
PO BOX 702, LAKE WORTH BEACH, FL 33460-0702
PO BOX 703, LAKE WORTH BEACH, FL 33460-0703
PO BOX 704, LAKE WORTH BEACH, FL 33460-0704
PO BOX 705, LAKE WORTH BEACH, FL 33460-0705
PO BOX 706, LAKE WORTH BEACH, FL 33460-0706
PO BOX 707, LAKE WORTH BEACH, FL 33460-0707
PO BOX 708, LAKE WORTH BEACH, FL 33460-0708
PO BOX 709, LAKE WORTH BEACH, FL 33460-0709
PO BOX 710, LAKE WORTH BEACH, FL 33460-0710
PO BOX 711, LAKE WORTH BEACH, FL 33460-0711
PO BOX 712, LAKE WORTH BEACH, FL 33460-0712
PO BOX 713, LAKE WORTH BEACH, FL 33460-0713
PO BOX 714, LAKE WORTH BEACH, FL 33460-0714
PO BOX 715, LAKE WORTH BEACH, FL 33460-0715
PO BOX 716, LAKE WORTH BEACH, FL 33460-0716
PO BOX 717, LAKE WORTH BEACH, FL 33460-0717
PO BOX 718, LAKE WORTH BEACH, FL 33460-0718
PO BOX 719, LAKE WORTH BEACH, FL 33460-0719
PO BOX 720, LAKE WORTH BEACH, FL 33460-0720
PO BOX 721, LAKE WORTH BEACH, FL 33460-0721
PO BOX 722, LAKE WORTH BEACH, FL 33460-0722
PO BOX 723, LAKE WORTH BEACH, FL 33460-0723
PO BOX 724, LAKE WORTH BEACH, FL 33460-0724
PO BOX 725, LAKE WORTH BEACH, FL 33460-0725
PO BOX 726, LAKE WORTH BEACH, FL 33460-0726
PO BOX 727, LAKE WORTH BEACH, FL 33460-0727
PO BOX 728, LAKE WORTH BEACH, FL 33460-0728
PO BOX 729, LAKE WORTH BEACH, FL 33460-0729
PO BOX 730, LAKE WORTH BEACH, FL 33460-0730
PO BOX 731, LAKE WORTH BEACH, FL 33460-0731
PO BOX 732, LAKE WORTH BEACH, FL 33460-0732
PO BOX 733, LAKE WORTH BEACH, FL 33460-0733
PO BOX 734, LAKE WORTH BEACH, FL 33460-0734
PO BOX 735, LAKE WORTH BEACH, FL 33460-0735
PO BOX 736, LAKE WORTH BEACH, FL 33460-0736
PO BOX 737, LAKE WORTH BEACH, FL 33460-0737
PO BOX 738, LAKE WORTH BEACH, FL 33460-0738
PO BOX 739, LAKE WORTH BEACH, FL 33460-0739
PO BOX 740, LAKE WORTH BEACH, FL 33460-0740
PO BOX 741, LAKE WORTH BEACH, FL 33460-0741
PO BOX 742, LAKE WORTH BEACH, FL 33460-0742
PO BOX 743, LAKE WORTH BEACH, FL 33460-0743
PO BOX 744, LAKE WORTH BEACH, FL 33460-0744
PO BOX 745, LAKE WORTH BEACH, FL 33460-0745
PO BOX 746, LAKE WORTH BEACH, FL 33460-0746
PO BOX 747, LAKE WORTH BEACH, FL 33460-0747
PO BOX 748, LAKE WORTH BEACH, FL 33460-0748
PO BOX 749, LAKE WORTH BEACH, FL 33460-0749
PO BOX 750, LAKE WORTH BEACH, FL 33460-0750
PO BOX 751, LAKE WORTH BEACH, FL 33460-0751
PO BOX 752, LAKE WORTH BEACH, FL 33460-0752
PO BOX 753, LAKE WORTH BEACH, FL 33460-0753
PO BOX 754, LAKE WORTH BEACH, FL 33460-0754
PO BOX 755, LAKE WORTH BEACH, FL 33460-0755
PO BOX 756, LAKE WORTH BEACH, FL 33460-0756
PO BOX 757, LAKE WORTH BEACH, FL 33460-0757
PO BOX 758, LAKE WORTH BEACH, FL 33460-0758
PO BOX 759, LAKE WORTH BEACH, FL 33460-0759
PO BOX 760, LAKE WORTH BEACH, FL 33460-0760
PO BOX 761, LAKE WORTH BEACH, FL 33460-0761
PO BOX 762, LAKE WORTH BEACH, FL 33460-0762
PO BOX 763, LAKE WORTH BEACH, FL 33460-0763
PO BOX 764, LAKE WORTH BEACH, FL 33460-0764
PO BOX 765, LAKE WORTH BEACH, FL 33460-0765
PO BOX 766, LAKE WORTH BEACH, FL 33460-0766
PO BOX 767, LAKE WORTH BEACH, FL 33460-0767
PO BOX 768, LAKE WORTH BEACH, FL 33460-0768
PO BOX 769, LAKE WORTH BEACH, FL 33460-0769
PO BOX 770, LAKE WORTH BEACH, FL 33460-0770
PO BOX 771, LAKE WORTH BEACH, FL 33460-0771
PO BOX 772, LAKE WORTH BEACH, FL 33460-0772
PO BOX 773, LAKE WORTH BEACH, FL 33460-0773
PO BOX 774, LAKE WORTH BEACH, FL 33460-0774
PO BOX 775, LAKE WORTH BEACH, FL 33460-0775
PO BOX 776, LAKE WORTH BEACH, FL 33460-0776
PO BOX 777, LAKE WORTH BEACH, FL 33460-0777
PO BOX 778, LAKE WORTH BEACH, FL 33460-0778
PO BOX 779, LAKE WORTH BEACH, FL 33460-0779
PO BOX 780, LAKE WORTH BEACH, FL 33460-0780
PO BOX 781, LAKE WORTH BEACH, FL 33460-0781
PO BOX 782, LAKE WORTH BEACH, FL 33460-0782
PO BOX 783, LAKE WORTH BEACH, FL 33460-0783
PO BOX 784, LAKE WORTH BEACH, FL 33460-0784
PO BOX 785, LAKE WORTH BEACH, FL 33460-0785
PO BOX 786, LAKE WORTH BEACH, FL 33460-0786
PO BOX 787, LAKE WORTH BEACH, FL 33460-0787
PO BOX 788, LAKE WORTH BEACH, FL 33460-0788
PO BOX 789, LAKE WORTH BEACH, FL 33460-0789
PO BOX 790, LAKE WORTH BEACH, FL 33460-0790
PO BOX 791, LAKE WORTH BEACH, FL 33460-0791
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