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, COLUMBIA, MS 39429-0641
PO BOX 642, COLUMBIA, MS 39429-0642
PO BOX 643, COLUMBIA, MS 39429-0643
PO BOX 644, COLUMBIA, MS 39429-0644
PO BOX 645, COLUMBIA, MS 39429-0645
PO BOX 646, COLUMBIA, MS 39429-0646
PO BOX 647, COLUMBIA, MS 39429-0647
PO BOX 648, COLUMBIA, MS 39429-0648
PO BOX 649, COLUMBIA, MS 39429-0649
PO BOX 650, COLUMBIA, MS 39429-0650
PO BOX 651, COLUMBIA, MS 39429-0651
PO BOX 652, COLUMBIA, MS 39429-0652
PO BOX 653, COLUMBIA, MS 39429-0653
PO BOX 654, COLUMBIA, MS 39429-0654
PO BOX 655, COLUMBIA, MS 39429-0655
PO BOX 656, COLUMBIA, MS 39429-0656
PO BOX 657, COLUMBIA, MS 39429-0657
PO BOX 658, COLUMBIA, MS 39429-0658
PO BOX 659, COLUMBIA, MS 39429-0659
PO BOX 660, COLUMBIA, MS 39429-0660
PO BOX 661, COLUMBIA, MS 39429-0661
PO BOX 662, COLUMBIA, MS 39429-0662
PO BOX 663, COLUMBIA, MS 39429-0663
PO BOX 664, COLUMBIA, MS 39429-0664
PO BOX 665, COLUMBIA, MS 39429-0665
PO BOX 666, COLUMBIA, MS 39429-0666
PO BOX 667, COLUMBIA, MS 39429-0667
PO BOX 668, COLUMBIA, MS 39429-0668
PO BOX 669, COLUMBIA, MS 39429-0669
PO BOX 670, COLUMBIA, MS 39429-0670
PO BOX 671, COLUMBIA, MS 39429-0671
PO BOX 672, COLUMBIA, MS 39429-0672
PO BOX 673, COLUMBIA, MS 39429-0673
PO BOX 674, COLUMBIA, MS 39429-0674
PO BOX 675, COLUMBIA, MS 39429-0675
PO BOX 676, COLUMBIA, MS 39429-0676
PO BOX 677, COLUMBIA, MS 39429-0677
PO BOX 678, COLUMBIA, MS 39429-0678
PO BOX 679, COLUMBIA, MS 39429-0679
PO BOX 680, COLUMBIA, MS 39429-0680
PO BOX 681, COLUMBIA, MS 39429-0681
PO BOX 682, COLUMBIA, MS 39429-0682
PO BOX 683, COLUMBIA, MS 39429-0683
PO BOX 684, COLUMBIA, MS 39429-0684
PO BOX 685, COLUMBIA, MS 39429-0685
PO BOX 686, COLUMBIA, MS 39429-0686
PO BOX 687, COLUMBIA, MS 39429-0687
PO BOX 688, COLUMBIA, MS 39429-0688
PO BOX 689, COLUMBIA, MS 39429-0689
PO BOX 690, COLUMBIA, MS 39429-0690
PO BOX 691, COLUMBIA, MS 39429-0691
PO BOX 692, COLUMBIA, MS 39429-0692
PO BOX 693, COLUMBIA, MS 39429-0693
PO BOX 694, COLUMBIA, MS 39429-0694
PO BOX 695, COLUMBIA, MS 39429-0695
PO BOX 696, COLUMBIA, MS 39429-0696
PO BOX 697, COLUMBIA, MS 39429-0697
PO BOX 698, COLUMBIA, MS 39429-0698
PO BOX 699, COLUMBIA, MS 39429-0699
PO BOX 700, COLUMBIA, MS 39429-0700
PO BOX 701, COLUMBIA, MS 39429-0701
PO BOX 702, COLUMBIA, MS 39429-0702
PO BOX 703, COLUMBIA, MS 39429-0703
PO BOX 704, COLUMBIA, MS 39429-0704
PO BOX 705, COLUMBIA, MS 39429-0705
PO BOX 706, COLUMBIA, MS 39429-0706
PO BOX 707, COLUMBIA, MS 39429-0707
PO BOX 708, COLUMBIA, MS 39429-0708
PO BOX 709, COLUMBIA, MS 39429-0709
PO BOX 710, COLUMBIA, MS 39429-0710
PO BOX 711, COLUMBIA, MS 39429-0711
PO BOX 712, COLUMBIA, MS 39429-0712
PO BOX 713, COLUMBIA, MS 39429-0713
PO BOX 714, COLUMBIA, MS 39429-0714
PO BOX 715, COLUMBIA, MS 39429-0715
PO BOX 716, COLUMBIA, MS 39429-0716
PO BOX 717, COLUMBIA, MS 39429-0717
PO BOX 718, COLUMBIA, MS 39429-0718
PO BOX 719, COLUMBIA, MS 39429-0719
PO BOX 720, COLUMBIA, MS 39429-0720
PO BOX 721, COLUMBIA, MS 39429-0721
PO BOX 722, COLUMBIA, MS 39429-0722
PO BOX 723, COLUMBIA, MS 39429-0723
PO BOX 724, COLUMBIA, MS 39429-0724
PO BOX 725, COLUMBIA, MS 39429-0725
PO BOX 726, COLUMBIA, MS 39429-0726
PO BOX 727, COLUMBIA, MS 39429-0727
PO BOX 728, COLUMBIA, MS 39429-0728
PO BOX 729, COLUMBIA, MS 39429-0729
PO BOX 730, COLUMBIA, MS 39429-0730
PO BOX 731, COLUMBIA, MS 39429-0731
PO BOX 732, COLUMBIA, MS 39429-0732
PO BOX 733, COLUMBIA, MS 39429-0733
PO BOX 734, COLUMBIA, MS 39429-0734
PO BOX 735, COLUMBIA, MS 39429-0735
PO BOX 736, COLUMBIA, MS 39429-0736
PO BOX 737, COLUMBIA, MS 39429-0737
PO BOX 738, COLUMBIA, MS 39429-0738
PO BOX 739, COLUMBIA, MS 39429-0739
PO BOX 740, COLUMBIA, MS 39429-0740
PO BOX 741, COLUMBIA, MS 39429-0741
PO BOX 742, COLUMBIA, MS 39429-0742
PO BOX 743, COLUMBIA, MS 39429-0743
PO BOX 744, COLUMBIA, MS 39429-0744
PO BOX 745, COLUMBIA, MS 39429-0745
PO BOX 746, COLUMBIA, MS 39429-0746
PO BOX 747, COLUMBIA, MS 39429-0747
PO BOX 748, COLUMBIA, MS 39429-0748
PO BOX 749, COLUMBIA, MS 39429-0749
PO BOX 750, COLUMBIA, MS 39429-0750
PO BOX 751, COLUMBIA, MS 39429-0751
PO BOX 752, COLUMBIA, MS 39429-0752
PO BOX 753, COLUMBIA, MS 39429-0753
PO BOX 754, COLUMBIA, MS 39429-0754
PO BOX 755, COLUMBIA, MS 39429-0755
PO BOX 756, COLUMBIA, MS 39429-0756
PO BOX 757, COLUMBIA, MS 39429-0757
PO BOX 758, COLUMBIA, MS 39429-0758
PO BOX 759, COLUMBIA, MS 39429-0759
PO BOX 760, COLUMBIA, MS 39429-0760
PO BOX 761, COLUMBIA, MS 39429-0761
PO BOX 762, COLUMBIA, MS 39429-0762
PO BOX 763, COLUMBIA, MS 39429-0763
PO BOX 764, COLUMBIA, MS 39429-0764
PO BOX 765, COLUMBIA, MS 39429-0765
PO BOX 766, COLUMBIA, MS 39429-0766
PO BOX 767, COLUMBIA, MS 39429-0767
PO BOX 768, COLUMBIA, MS 39429-0768
PO BOX 769, COLUMBIA, MS 39429-0769
PO BOX 770, COLUMBIA, MS 39429-0770
PO BOX 771, COLUMBIA, MS 39429-0771
PO BOX 772, COLUMBIA, MS 39429-0772
PO BOX 773, COLUMBIA, MS 39429-0773
PO BOX 774, COLUMBIA, MS 39429-0774
PO BOX 775, COLUMBIA, MS 39429-0775
PO BOX 776, COLUMBIA, MS 39429-0776
PO BOX 777, COLUMBIA, MS 39429-0777
PO BOX 778, COLUMBIA, MS 39429-0778
PO BOX 779, COLUMBIA, MS 39429-0779
PO BOX 780, COLUMBIA, MS 39429-0780
PO BOX 781, COLUMBIA, MS 39429-0781
PO BOX 782, COLUMBIA, MS 39429-0782
PO BOX 783, COLUMBIA, MS 39429-0783
PO BOX 784, COLUMBIA, MS 39429-0784
PO BOX 785, COLUMBIA, MS 39429-0785
PO BOX 786, COLUMBIA, MS 39429-0786
PO BOX 787, COLUMBIA, MS 39429-0787
PO BOX 788, COLUMBIA, MS 39429-0788
PO BOX 789, COLUMBIA, MS 39429-0789
PO BOX 790, COLUMBIA, MS 39429-0790
PO BOX 791, COLUMBIA, MS 39429-0791
PO BOX 792, COLUMBIA, MS 39429-0792
PO BOX 793, COLUMBIA, MS 39429-0793
PO BOX 794, COLUMBIA, MS 39429-0794
PO BOX 795, COLUMBIA, MS 39429-0795
PO BOX 796, COLUMBIA, MS 39429-0796
PO BOX 797, COLUMBIA, MS 39429-0797
PO BOX 798, COLUMBIA, MS 39429-0798
PO BOX 799, COLUMBIA, MS 39429-0799
PO BOX 800, COLUMBIA, MS 39429-0800
PO BOX 801, COLUMBIA, MS 39429-0801
PO BOX 802, COLUMBIA, MS 39429-0802
PO BOX 803, COLUMBIA, MS 39429-0803
PO BOX 804, COLUMBIA, MS 39429-0804
PO BOX 805, COLUMBIA, MS 39429-0805
PO BOX 806, COLUMBIA, MS 39429-0806
PO BOX 807, COLUMBIA, MS 39429-0807
PO BOX 808, COLUMBIA, MS 39429-0808
PO BOX 809, COLUMBIA, MS 39429-0809
PO BOX 810, COLUMBIA, MS 39429-0810
PO BOX 811, COLUMBIA, MS 39429-0811
PO BOX 812, COLUMBIA, MS 39429-0812
PO BOX 813, COLUMBIA, MS 39429-0813
PO BOX 814, COLUMBIA, MS 39429-0814
PO BOX 815, COLUMBIA, MS 39429-0815
PO BOX 816, COLUMBIA, MS 39429-0816
PO BOX 817, COLUMBIA, MS 39429-0817
PO BOX 818, COLUMBIA, MS 39429-0818
PO BOX 819, COLUMBIA, MS 39429-0819
PO BOX 820, COLUMBIA, MS 39429-0820
PO BOX 821, COLUMBIA, MS 39429-0821
PO BOX 822, COLUMBIA, MS 39429-0822
PO BOX 823, COLUMBIA, MS 39429-0823
PO BOX 824, COLUMBIA, MS 39429-0824
PO BOX 825, COLUMBIA, MS 39429-0825
PO BOX 826, COLUMBIA, MS 39429-0826
PO BOX 827, COLUMBIA, MS 39429-0827
PO BOX 828, COLUMBIA, MS 39429-0828
PO BOX 829, COLUMBIA, MS 39429-0829
PO BOX 830, COLUMBIA, MS 39429-0830
PO BOX 831, COLUMBIA, MS 39429-0831
PO BOX 832, COLUMBIA, MS 39429-0832
PO BOX 833, COLUMBIA, MS 39429-0833
PO BOX 834, COLUMBIA, MS 39429-0834
PO BOX 835, COLUMBIA, MS 39429-0835
PO BOX 836, COLUMBIA, MS 39429-0836
PO BOX 837, COLUMBIA, MS 39429-0837
PO BOX 838, COLUMBIA, MS 39429-0838
PO BOX 839, COLUMBIA, MS 39429-0839
PO BOX 840, COLUMBIA, MS 39429-0840
PO BOX 841, COLUMBIA, MS 39429-0841
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