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 661, CLEVELAND, MS 38732-0661
PO BOX 662, CLEVELAND, MS 38732-0662
PO BOX 663, CLEVELAND, MS 38732-0663
PO BOX 664, CLEVELAND, MS 38732-0664
PO BOX 665, CLEVELAND, MS 38732-0665
PO BOX 666, CLEVELAND, MS 38732-0666
PO BOX 667, CLEVELAND, MS 38732-0667
PO BOX 668, CLEVELAND, MS 38732-0668
PO BOX 669, CLEVELAND, MS 38732-0669
PO BOX 670, CLEVELAND, MS 38732-0670
PO BOX 671, CLEVELAND, MS 38732-0671
PO BOX 672, CLEVELAND, MS 38732-0672
PO BOX 673, CLEVELAND, MS 38732-0673
PO BOX 674, CLEVELAND, MS 38732-0674
PO BOX 675, CLEVELAND, MS 38732-0675
PO BOX 676, CLEVELAND, MS 38732-0676
PO BOX 677, CLEVELAND, MS 38732-0677
PO BOX 678, CLEVELAND, MS 38732-0678
PO BOX 679, CLEVELAND, MS 38732-0679
PO BOX 680, CLEVELAND, MS 38732-0680
PO BOX 681, CLEVELAND, MS 38732-0681
PO BOX 682, CLEVELAND, MS 38732-0682
PO BOX 683, CLEVELAND, MS 38732-0683
PO BOX 684, CLEVELAND, MS 38732-0684
PO BOX 685, CLEVELAND, MS 38732-0685
PO BOX 686, CLEVELAND, MS 38732-0686
PO BOX 687, CLEVELAND, MS 38732-0687
PO BOX 688, CLEVELAND, MS 38732-0688
PO BOX 689, CLEVELAND, MS 38732-0689
PO BOX 690, CLEVELAND, MS 38732-0690
PO BOX 691, CLEVELAND, MS 38732-0691
PO BOX 692, CLEVELAND, MS 38732-0692
PO BOX 693, CLEVELAND, MS 38732-0693
PO BOX 694, CLEVELAND, MS 38732-0694
PO BOX 695, CLEVELAND, MS 38732-0695
PO BOX 696, CLEVELAND, MS 38732-0696
PO BOX 697, CLEVELAND, MS 38732-0697
PO BOX 698, CLEVELAND, MS 38732-0698
PO BOX 699, CLEVELAND, MS 38732-0699
PO BOX 700, CLEVELAND, MS 38732-0700
PO BOX 701, CLEVELAND, MS 38732-0701
PO BOX 702, CLEVELAND, MS 38732-0702
PO BOX 703, CLEVELAND, MS 38732-0703
PO BOX 704, CLEVELAND, MS 38732-0704
PO BOX 705, CLEVELAND, MS 38732-0705
PO BOX 706, CLEVELAND, MS 38732-0706
PO BOX 707, CLEVELAND, MS 38732-0707
PO BOX 708, CLEVELAND, MS 38732-0708
PO BOX 709, CLEVELAND, MS 38732-0709
PO BOX 710, CLEVELAND, MS 38732-0710
PO BOX 711, CLEVELAND, MS 38732-0711
PO BOX 712, CLEVELAND, MS 38732-0712
PO BOX 713, CLEVELAND, MS 38732-0713
PO BOX 714, CLEVELAND, MS 38732-0714
PO BOX 715, CLEVELAND, MS 38732-0715
PO BOX 716, CLEVELAND, MS 38732-0716
PO BOX 717, CLEVELAND, MS 38732-0717
PO BOX 718, CLEVELAND, MS 38732-0718
PO BOX 719, CLEVELAND, MS 38732-0719
PO BOX 720, CLEVELAND, MS 38732-0720
PO BOX 721, CLEVELAND, MS 38732-0721
PO BOX 722, CLEVELAND, MS 38732-0722
PO BOX 723, CLEVELAND, MS 38732-0723
PO BOX 724, CLEVELAND, MS 38732-0724
PO BOX 725, CLEVELAND, MS 38732-0725
PO BOX 726, CLEVELAND, MS 38732-0726
PO BOX 727, CLEVELAND, MS 38732-0727
PO BOX 728, CLEVELAND, MS 38732-0728
PO BOX 729, CLEVELAND, MS 38732-0729
PO BOX 730, CLEVELAND, MS 38732-0730
PO BOX 731, CLEVELAND, MS 38732-0731
PO BOX 732, CLEVELAND, MS 38732-0732
PO BOX 733, CLEVELAND, MS 38732-0733
PO BOX 734, CLEVELAND, MS 38732-0734
PO BOX 735, CLEVELAND, MS 38732-0735
PO BOX 736, CLEVELAND, MS 38732-0736
PO BOX 737, CLEVELAND, MS 38732-0737
PO BOX 738, CLEVELAND, MS 38732-0738
PO BOX 739, CLEVELAND, MS 38732-0739
PO BOX 740, CLEVELAND, MS 38732-0740
PO BOX 741, CLEVELAND, MS 38732-0741
PO BOX 742, CLEVELAND, MS 38732-0742
PO BOX 743, CLEVELAND, MS 38732-0743
PO BOX 744, CLEVELAND, MS 38732-0744
PO BOX 745, CLEVELAND, MS 38732-0745
PO BOX 746, CLEVELAND, MS 38732-0746
PO BOX 747, CLEVELAND, MS 38732-0747
PO BOX 748, CLEVELAND, MS 38732-0748
PO BOX 749, CLEVELAND, MS 38732-0749
PO BOX 750, CLEVELAND, MS 38732-0750
PO BOX 751, CLEVELAND, MS 38732-0751
PO BOX 752, CLEVELAND, MS 38732-0752
PO BOX 753, CLEVELAND, MS 38732-0753
PO BOX 754, CLEVELAND, MS 38732-0754
PO BOX 755, CLEVELAND, MS 38732-0755
PO BOX 756, CLEVELAND, MS 38732-0756
PO BOX 757, CLEVELAND, MS 38732-0757
PO BOX 758, CLEVELAND, MS 38732-0758
PO BOX 759, CLEVELAND, MS 38732-0759
PO BOX 760, CLEVELAND, MS 38732-0760
PO BOX 761, CLEVELAND, MS 38732-0761
PO BOX 762, CLEVELAND, MS 38732-0762
PO BOX 763, CLEVELAND, MS 38732-0763
PO BOX 764, CLEVELAND, MS 38732-0764
PO BOX 765, CLEVELAND, MS 38732-0765
PO BOX 766, CLEVELAND, MS 38732-0766
PO BOX 767, CLEVELAND, MS 38732-0767
PO BOX 768, CLEVELAND, MS 38732-0768
PO BOX 769, CLEVELAND, MS 38732-0769
PO BOX 770, CLEVELAND, MS 38732-0770
PO BOX 771, CLEVELAND, MS 38732-0771
PO BOX 772, CLEVELAND, MS 38732-0772
PO BOX 773, CLEVELAND, MS 38732-0773
PO BOX 774, CLEVELAND, MS 38732-0774
PO BOX 775, CLEVELAND, MS 38732-0775
PO BOX 776, CLEVELAND, MS 38732-0776
PO BOX 777, CLEVELAND, MS 38732-0777
PO BOX 778, CLEVELAND, MS 38732-0778
PO BOX 779, CLEVELAND, MS 38732-0779
PO BOX 780, CLEVELAND, MS 38732-0780
PO BOX 781, CLEVELAND, MS 38732-0781
PO BOX 782, CLEVELAND, MS 38732-0782
PO BOX 783, CLEVELAND, MS 38732-0783
PO BOX 784, CLEVELAND, MS 38732-0784
PO BOX 785, CLEVELAND, MS 38732-0785
PO BOX 786, CLEVELAND, MS 38732-0786
PO BOX 787, CLEVELAND, MS 38732-0787
PO BOX 788, CLEVELAND, MS 38732-0788
PO BOX 789, CLEVELAND, MS 38732-0789
PO BOX 790, CLEVELAND, MS 38732-0790
PO BOX 791, CLEVELAND, MS 38732-0791
PO BOX 792, CLEVELAND, MS 38732-0792
PO BOX 793, CLEVELAND, MS 38732-0793
PO BOX 794, CLEVELAND, MS 38732-0794
PO BOX 795, CLEVELAND, MS 38732-0795
PO BOX 796, CLEVELAND, MS 38732-0796
PO BOX 797, CLEVELAND, MS 38732-0797
PO BOX 798, CLEVELAND, MS 38732-0798
PO BOX 799, CLEVELAND, MS 38732-0799
PO BOX 800, CLEVELAND, MS 38732-0800
PO BOX 801, CLEVELAND, MS 38732-0801
PO BOX 802, CLEVELAND, MS 38732-0802
PO BOX 803, CLEVELAND, MS 38732-0803
PO BOX 804, CLEVELAND, MS 38732-0804
PO BOX 805, CLEVELAND, MS 38732-0805
PO BOX 806, CLEVELAND, MS 38732-0806
PO BOX 807, CLEVELAND, MS 38732-0807
PO BOX 808, CLEVELAND, MS 38732-0808
PO BOX 809, CLEVELAND, MS 38732-0809
PO BOX 810, CLEVELAND, MS 38732-0810
PO BOX 811, CLEVELAND, MS 38732-0811
PO BOX 812, CLEVELAND, MS 38732-0812
PO BOX 813, CLEVELAND, MS 38732-0813
PO BOX 814, CLEVELAND, MS 38732-0814
PO BOX 815, CLEVELAND, MS 38732-0815
PO BOX 816, CLEVELAND, MS 38732-0816
PO BOX 817, CLEVELAND, MS 38732-0817
PO BOX 818, CLEVELAND, MS 38732-0818
PO BOX 819, CLEVELAND, MS 38732-0819
PO BOX 820, CLEVELAND, MS 38732-0820
PO BOX 821, CLEVELAND, MS 38732-0821
PO BOX 822, CLEVELAND, MS 38732-0822
PO BOX 823, CLEVELAND, MS 38732-0823
PO BOX 824, CLEVELAND, MS 38732-0824
PO BOX 825, CLEVELAND, MS 38732-0825
PO BOX 826, CLEVELAND, MS 38732-0826
PO BOX 827, CLEVELAND, MS 38732-0827
PO BOX 828, CLEVELAND, MS 38732-0828
PO BOX 829, CLEVELAND, MS 38732-0829
PO BOX 830, CLEVELAND, MS 38732-0830
PO BOX 831, CLEVELAND, MS 38732-0831
PO BOX 832, CLEVELAND, MS 38732-0832
PO BOX 833, CLEVELAND, MS 38732-0833
PO BOX 834, CLEVELAND, MS 38732-0834
PO BOX 835, CLEVELAND, MS 38732-0835
PO BOX 836, CLEVELAND, MS 38732-0836
PO BOX 837, CLEVELAND, MS 38732-0837
PO BOX 838, CLEVELAND, MS 38732-0838
PO BOX 839, CLEVELAND, MS 38732-0839
PO BOX 840, CLEVELAND, MS 38732-0840
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