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 340731, COLUMBUS, OH 43234-0731
PO BOX 340732, COLUMBUS, OH 43234-0732
PO BOX 340733, COLUMBUS, OH 43234-0733
PO BOX 340734, COLUMBUS, OH 43234-0734
PO BOX 340735, COLUMBUS, OH 43234-0735
PO BOX 340736, COLUMBUS, OH 43234-0736
PO BOX 340737, COLUMBUS, OH 43234-0737
PO BOX 340738, COLUMBUS, OH 43234-0738
PO BOX 340739, COLUMBUS, OH 43234-0739
PO BOX 340740, COLUMBUS, OH 43234-0740
PO BOX 340741, COLUMBUS, OH 43234-0741
PO BOX 340742, COLUMBUS, OH 43234-0742
PO BOX 340743, COLUMBUS, OH 43234-0743
PO BOX 340744, COLUMBUS, OH 43234-0744
PO BOX 340745, COLUMBUS, OH 43234-0745
PO BOX 340746, COLUMBUS, OH 43234-0746
PO BOX 340747, COLUMBUS, OH 43234-0747
PO BOX 340748, COLUMBUS, OH 43234-0748
PO BOX 340749, COLUMBUS, OH 43234-0749
PO BOX 340750, COLUMBUS, OH 43234-0750
PO BOX 340751, COLUMBUS, OH 43234-0751
PO BOX 340752, COLUMBUS, OH 43234-0752
PO BOX 340753, COLUMBUS, OH 43234-0753
PO BOX 340754, COLUMBUS, OH 43234-0754
PO BOX 340755, COLUMBUS, OH 43234-0755
PO BOX 340756, COLUMBUS, OH 43234-0756
PO BOX 340757, COLUMBUS, OH 43234-0757
PO BOX 340758, COLUMBUS, OH 43234-0758
PO BOX 340759, COLUMBUS, OH 43234-0759
PO BOX 340760, COLUMBUS, OH 43234-0760
PO BOX 340761, COLUMBUS, OH 43234-0761
PO BOX 340762, COLUMBUS, OH 43234-0762
PO BOX 340763, COLUMBUS, OH 43234-0763
PO BOX 340764, COLUMBUS, OH 43234-0764
PO BOX 340765, COLUMBUS, OH 43234-0765
PO BOX 340766, COLUMBUS, OH 43234-0766
PO BOX 340767, COLUMBUS, OH 43234-0767
PO BOX 340768, COLUMBUS, OH 43234-0768
PO BOX 340769, COLUMBUS, OH 43234-0769
PO BOX 340770, COLUMBUS, OH 43234-0770
PO BOX 340771, COLUMBUS, OH 43234-0771
PO BOX 340772, COLUMBUS, OH 43234-0772
PO BOX 340773, COLUMBUS, OH 43234-0773
PO BOX 340774, COLUMBUS, OH 43234-0774
PO BOX 340775, COLUMBUS, OH 43234-0775
PO BOX 340776, COLUMBUS, OH 43234-0776
PO BOX 340777, COLUMBUS, OH 43234-0777
PO BOX 340778, COLUMBUS, OH 43234-0778
PO BOX 340779, COLUMBUS, OH 43234-0779
PO BOX 340780, COLUMBUS, OH 43234-0780
PO BOX 340781, COLUMBUS, OH 43234-0781
PO BOX 340782, COLUMBUS, OH 43234-0782
PO BOX 340783, COLUMBUS, OH 43234-0783
PO BOX 340784, COLUMBUS, OH 43234-0784
PO BOX 340785, COLUMBUS, OH 43234-0785
PO BOX 340786, COLUMBUS, OH 43234-0786
PO BOX 340787, COLUMBUS, OH 43234-0787
PO BOX 340788, COLUMBUS, OH 43234-0788
PO BOX 340789, COLUMBUS, OH 43234-0789
PO BOX 340790, COLUMBUS, OH 43234-0790
PO BOX 340791, COLUMBUS, OH 43234-0791
PO BOX 340792, COLUMBUS, OH 43234-0792
PO BOX 340793, COLUMBUS, OH 43234-0793
PO BOX 340794, COLUMBUS, OH 43234-0794
PO BOX 340795, COLUMBUS, OH 43234-0795
PO BOX 340796, COLUMBUS, OH 43234-0796
PO BOX 340797, COLUMBUS, OH 43234-0797
PO BOX 340798, COLUMBUS, OH 43234-0798
PO BOX 340799, COLUMBUS, OH 43234-0799
PO BOX 340800, COLUMBUS, OH 43234-0800
PO BOX 340801, COLUMBUS, OH 43234-0801
PO BOX 340802, COLUMBUS, OH 43234-0802
PO BOX 340803, COLUMBUS, OH 43234-0803
PO BOX 340804, COLUMBUS, OH 43234-0804
PO BOX 340805, COLUMBUS, OH 43234-0805
PO BOX 340806, COLUMBUS, OH 43234-0806
PO BOX 340807, COLUMBUS, OH 43234-0807
PO BOX 340808, COLUMBUS, OH 43234-0808
PO BOX 340809, COLUMBUS, OH 43234-0809
PO BOX 340810, COLUMBUS, OH 43234-0810
PO BOX 340811, COLUMBUS, OH 43234-0811
PO BOX 340812, COLUMBUS, OH 43234-0812
PO BOX 340813, COLUMBUS, OH 43234-0813
PO BOX 340814, COLUMBUS, OH 43234-0814
PO BOX 340815, COLUMBUS, OH 43234-0815
PO BOX 340816, COLUMBUS, OH 43234-0816
PO BOX 340817, COLUMBUS, OH 43234-0817
PO BOX 340818, COLUMBUS, OH 43234-0818
PO BOX 340819, COLUMBUS, OH 43234-0819
PO BOX 340820, COLUMBUS, OH 43234-0820
PO BOX 340821, COLUMBUS, OH 43234-0821
PO BOX 340822, COLUMBUS, OH 43234-0822
PO BOX 340823, COLUMBUS, OH 43234-0823
PO BOX 340824, COLUMBUS, OH 43234-0824
PO BOX 340825, COLUMBUS, OH 43234-0825
PO BOX 340826, COLUMBUS, OH 43234-0826
PO BOX 340827, COLUMBUS, OH 43234-0827
PO BOX 340828, COLUMBUS, OH 43234-0828
PO BOX 340829, COLUMBUS, OH 43234-0829
PO BOX 340830, COLUMBUS, OH 43234-0830
PO BOX 340831, COLUMBUS, OH 43234-0831
PO BOX 340832, COLUMBUS, OH 43234-0832
PO BOX 340833, COLUMBUS, OH 43234-0833
PO BOX 340834, COLUMBUS, OH 43234-0834
PO BOX 340835, COLUMBUS, OH 43234-0835
PO BOX 340836, COLUMBUS, OH 43234-0836
PO BOX 340837, COLUMBUS, OH 43234-0837
PO BOX 340838, COLUMBUS, OH 43234-0838
PO BOX 340839, COLUMBUS, OH 43234-0839
PO BOX 340840, COLUMBUS, OH 43234-0840
PO BOX 340841, COLUMBUS, OH 43234-0841
PO BOX 340842, COLUMBUS, OH 43234-0842
PO BOX 340843, COLUMBUS, OH 43234-0843
PO BOX 340844, COLUMBUS, OH 43234-0844
PO BOX 340845, COLUMBUS, OH 43234-0845
PO BOX 340846, COLUMBUS, OH 43234-0846
PO BOX 340847, COLUMBUS, OH 43234-0847
PO BOX 340848, COLUMBUS, OH 43234-0848
PO BOX 340849, COLUMBUS, OH 43234-0849
PO BOX 340850, COLUMBUS, OH 43234-0850
PO BOX 340851, COLUMBUS, OH 43234-0851
PO BOX 340852, COLUMBUS, OH 43234-0852
PO BOX 340853, COLUMBUS, OH 43234-0853
PO BOX 340854, COLUMBUS, OH 43234-0854
PO BOX 340855, COLUMBUS, OH 43234-0855
PO BOX 340856, COLUMBUS, OH 43234-0856
PO BOX 340857, COLUMBUS, OH 43234-0857
PO BOX 340858, COLUMBUS, OH 43234-0858
PO BOX 340859, COLUMBUS, OH 43234-0859
PO BOX 340860, COLUMBUS, OH 43234-0860
PO BOX 340861, COLUMBUS, OH 43234-0861
PO BOX 340862, COLUMBUS, OH 43234-0862
PO BOX 340863, COLUMBUS, OH 43234-0863
PO BOX 340864, COLUMBUS, OH 43234-0864
PO BOX 340865, COLUMBUS, OH 43234-0865
PO BOX 340866, COLUMBUS, OH 43234-0866
PO BOX 340867, COLUMBUS, OH 43234-0867
PO BOX 340868, COLUMBUS, OH 43234-0868
PO BOX 340869, COLUMBUS, OH 43234-0869
PO BOX 340870, COLUMBUS, OH 43234-0870
PO BOX 340871, COLUMBUS, OH 43234-0871
PO BOX 340872, COLUMBUS, OH 43234-0872
PO BOX 340873, COLUMBUS, OH 43234-0873
PO BOX 340874, COLUMBUS, OH 43234-0874
PO BOX 340875, COLUMBUS, OH 43234-0875
PO BOX 340876, COLUMBUS, OH 43234-0876
PO BOX 340877, COLUMBUS, OH 43234-0877
PO BOX 340878, COLUMBUS, OH 43234-0878
PO BOX 340879, COLUMBUS, OH 43234-0879
PO BOX 340880, COLUMBUS, OH 43234-0880
PO BOX 340881, COLUMBUS, OH 43234-0881
PO BOX 340882, COLUMBUS, OH 43234-0882
PO BOX 340883, COLUMBUS, OH 43234-0883
PO BOX 340884, COLUMBUS, OH 43234-0884
PO BOX 340885, COLUMBUS, OH 43234-0885
PO BOX 340886, COLUMBUS, OH 43234-0886
PO BOX 340887, COLUMBUS, OH 43234-0887
PO BOX 340888, COLUMBUS, OH 43234-0888
PO BOX 340889, COLUMBUS, OH 43234-0889
PO BOX 340890, COLUMBUS, OH 43234-0890
PO BOX 340891, COLUMBUS, OH 43234-0891
PO BOX 340892, COLUMBUS, OH 43234-0892
PO BOX 340893, COLUMBUS, OH 43234-0893
PO BOX 340894, COLUMBUS, OH 43234-0894
PO BOX 340895, COLUMBUS, OH 43234-0895
PO BOX 340896, COLUMBUS, OH 43234-0896
PO BOX 340897, COLUMBUS, OH 43234-0897
PO BOX 340898, COLUMBUS, OH 43234-0898
PO BOX 340899, COLUMBUS, OH 43234-0899
PO BOX 340900, COLUMBUS, OH 43234-0900
PO BOX 340901, COLUMBUS, OH 43234-0901
PO BOX 340902, COLUMBUS, OH 43234-0902
PO BOX 340903, COLUMBUS, OH 43234-0903
PO BOX 340904, COLUMBUS, OH 43234-0904
PO BOX 340905, COLUMBUS, OH 43234-0905
PO BOX 340906, COLUMBUS, OH 43234-0906
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