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 10731, PEORIA, IL 61612-0731
PO BOX 10732, PEORIA, IL 61612-0732
PO BOX 10733, PEORIA, IL 61612-0733
PO BOX 10734, PEORIA, IL 61612-0734
PO BOX 10735, PEORIA, IL 61612-0735
PO BOX 10736, PEORIA, IL 61612-0736
PO BOX 10737, PEORIA, IL 61612-0737
PO BOX 10738, PEORIA, IL 61612-0738
PO BOX 10739, PEORIA, IL 61612-0739
PO BOX 10740, PEORIA, IL 61612-0740
PO BOX 10741, PEORIA, IL 61612-0741
PO BOX 10742, PEORIA, IL 61612-0742
PO BOX 10743, PEORIA, IL 61612-0743
PO BOX 10744, PEORIA, IL 61612-0744
PO BOX 10745, PEORIA, IL 61612-0745
PO BOX 10746, PEORIA, IL 61612-0746
PO BOX 10747, PEORIA, IL 61612-0747
PO BOX 10748, PEORIA, IL 61612-0748
PO BOX 10749, PEORIA, IL 61612-0749
PO BOX 10750, PEORIA, IL 61612-0750
PO BOX 10751, PEORIA, IL 61612-0751
PO BOX 10752, PEORIA, IL 61612-0752
PO BOX 10753, PEORIA, IL 61612-0753
PO BOX 10754, PEORIA, IL 61612-0754
PO BOX 10755, PEORIA, IL 61612-0755
PO BOX 10756, PEORIA, IL 61612-0756
PO BOX 10757, PEORIA, IL 61612-0757
PO BOX 10758, PEORIA, IL 61612-0758
PO BOX 10759, PEORIA, IL 61612-0759
PO BOX 10760, PEORIA, IL 61612-0760
PO BOX 10761, PEORIA, IL 61612-0761
PO BOX 10762, PEORIA, IL 61612-0762
PO BOX 10763, PEORIA, IL 61612-0763
PO BOX 10764, PEORIA, IL 61612-0764
PO BOX 10765, PEORIA, IL 61612-0765
PO BOX 10766, PEORIA, IL 61612-0766
PO BOX 10767, PEORIA, IL 61612-0767
PO BOX 10768, PEORIA, IL 61612-0768
PO BOX 10769, PEORIA, IL 61612-0769
PO BOX 10770, PEORIA, IL 61612-0770
PO BOX 10771, PEORIA, IL 61612-0771
PO BOX 10772, PEORIA, IL 61612-0772
PO BOX 10773, PEORIA, IL 61612-0773
PO BOX 10774, PEORIA, IL 61612-0774
PO BOX 10775, PEORIA, IL 61612-0775
PO BOX 10776, PEORIA, IL 61612-0776
PO BOX 10777, PEORIA, IL 61612-0777
PO BOX 10778, PEORIA, IL 61612-0778
PO BOX 10779, PEORIA, IL 61612-0779
PO BOX 10780, PEORIA, IL 61612-0780
PO BOX 10781, PEORIA, IL 61612-0781
PO BOX 10782, PEORIA, IL 61612-0782
PO BOX 10783, PEORIA, IL 61612-0783
PO BOX 10784, PEORIA, IL 61612-0784
PO BOX 10785, PEORIA, IL 61612-0785
PO BOX 10786, PEORIA, IL 61612-0786
PO BOX 10787, PEORIA, IL 61612-0787
PO BOX 10788, PEORIA, IL 61612-0788
PO BOX 10789, PEORIA, IL 61612-0789
PO BOX 10790, PEORIA, IL 61612-0790
PO BOX 10791, PEORIA, IL 61612-0791
PO BOX 10792, PEORIA, IL 61612-0792
PO BOX 10793, PEORIA, IL 61612-0793
PO BOX 10794, PEORIA, IL 61612-0794
PO BOX 10795, PEORIA, IL 61612-0795
PO BOX 10796, PEORIA, IL 61612-0796
PO BOX 10797, PEORIA, IL 61612-0797
PO BOX 10798, PEORIA, IL 61612-0798
PO BOX 10799, PEORIA, IL 61612-0799
PO BOX 10800, PEORIA, IL 61612-0800
PO BOX 10801, PEORIA, IL 61612-0801
PO BOX 10802, PEORIA, IL 61612-0802
PO BOX 10803, PEORIA, IL 61612-0803
PO BOX 10804, PEORIA, IL 61612-0804
PO BOX 10805, PEORIA, IL 61612-0805
PO BOX 10806, PEORIA, IL 61612-0806
PO BOX 10807, PEORIA, IL 61612-0807
PO BOX 10808, PEORIA, IL 61612-0808
PO BOX 10809, PEORIA, IL 61612-0809
PO BOX 10810, PEORIA, IL 61612-0810
PO BOX 10811, PEORIA, IL 61612-0811
PO BOX 10812, PEORIA, IL 61612-0812
PO BOX 10813, PEORIA, IL 61612-0813
PO BOX 10814, PEORIA, IL 61612-0814
PO BOX 10815, PEORIA, IL 61612-0815
PO BOX 10816, PEORIA, IL 61612-0816
PO BOX 10817, PEORIA, IL 61612-0817
PO BOX 10818, PEORIA, IL 61612-0818
PO BOX 10819, PEORIA, IL 61612-0819
PO BOX 10820, PEORIA, IL 61612-0820
PO BOX 10821, PEORIA, IL 61612-0821
PO BOX 10822, PEORIA, IL 61612-0822
PO BOX 10823, PEORIA, IL 61612-0823
PO BOX 10824, PEORIA, IL 61612-0824
PO BOX 10825, PEORIA, IL 61612-0825
PO BOX 10826, PEORIA, IL 61612-0826
PO BOX 10827, PEORIA, IL 61612-0827
PO BOX 10828, PEORIA, IL 61612-0828
PO BOX 10829, PEORIA, IL 61612-0829
PO BOX 10830, PEORIA, IL 61612-0830
PO BOX 10831, PEORIA, IL 61612-0831
PO BOX 10832, PEORIA, IL 61612-0832
PO BOX 10833, PEORIA, IL 61612-0833
PO BOX 10834, PEORIA, IL 61612-0834
PO BOX 10835, PEORIA, IL 61612-0835
PO BOX 10836, PEORIA, IL 61612-0836
PO BOX 10837, PEORIA, IL 61612-0837
PO BOX 10838, PEORIA, IL 61612-0838
PO BOX 10839, PEORIA, IL 61612-0839
PO BOX 10840, PEORIA, IL 61612-0840
PO BOX 10841, PEORIA, IL 61612-0841
PO BOX 10842, PEORIA, IL 61612-0842
PO BOX 10843, PEORIA, IL 61612-0843
PO BOX 10844, PEORIA, IL 61612-0844
PO BOX 10845, PEORIA, IL 61612-0845
PO BOX 10846, PEORIA, IL 61612-0846
PO BOX 10847, PEORIA, IL 61612-0847
PO BOX 10848, PEORIA, IL 61612-0848
PO BOX 10849, PEORIA, IL 61612-0849
PO BOX 10850, PEORIA, IL 61612-0850
PO BOX 10851, PEORIA, IL 61612-0851
PO BOX 10852, PEORIA, IL 61612-0852
PO BOX 10853, PEORIA, IL 61612-0853
PO BOX 10854, PEORIA, IL 61612-0854
PO BOX 10855, PEORIA, IL 61612-0855
PO BOX 10856, PEORIA, IL 61612-0856
PO BOX 10857, PEORIA, IL 61612-0857
PO BOX 10858, PEORIA, IL 61612-0858
PO BOX 10859, PEORIA, IL 61612-0859
PO BOX 10860, PEORIA, IL 61612-0860
PO BOX 10861, PEORIA, IL 61612-0861
PO BOX 10862, PEORIA, IL 61612-0862
PO BOX 10863, PEORIA, IL 61612-0863
PO BOX 10864, PEORIA, IL 61612-0864
PO BOX 10865, PEORIA, IL 61612-0865
PO BOX 10866, PEORIA, IL 61612-0866
PO BOX 10867, PEORIA, IL 61612-0867
PO BOX 10868, PEORIA, IL 61612-0868
PO BOX 10869, PEORIA, IL 61612-0869
PO BOX 10870, PEORIA, IL 61612-0870
PO BOX 10871, PEORIA, IL 61612-0871
PO BOX 10872, PEORIA, IL 61612-0872
PO BOX 10873, PEORIA, IL 61612-0873
PO BOX 10874, PEORIA, IL 61612-0874
PO BOX 10875, PEORIA, IL 61612-0875
PO BOX 10876, PEORIA, IL 61612-0876
PO BOX 10877, PEORIA, IL 61612-0877
PO BOX 10878, PEORIA, IL 61612-0878
PO BOX 10879, PEORIA, IL 61612-0879
PO BOX 10880, PEORIA, IL 61612-0880
PO BOX 10881, PEORIA, IL 61612-0881
PO BOX 10882, PEORIA, IL 61612-0882
PO BOX 10883, PEORIA, IL 61612-0883
PO BOX 10884, PEORIA, IL 61612-0884
PO BOX 10885, PEORIA, IL 61612-0885
PO BOX 10886, PEORIA, IL 61612-0886
PO BOX 10887, PEORIA, IL 61612-0887
PO BOX 10888, PEORIA, IL 61612-0888
PO BOX 10889, PEORIA, IL 61612-0889
PO BOX 10890, PEORIA, IL 61612-0890
PO BOX 10891, PEORIA, IL 61612-0891
PO BOX 10892, PEORIA, IL 61612-0892
PO BOX 10893, PEORIA, IL 61612-0893
PO BOX 10894, PEORIA, IL 61612-0894
PO BOX 10895, PEORIA, IL 61612-0895
PO BOX 10896, PEORIA, IL 61612-0896
PO BOX 10897, PEORIA, IL 61612-0897
PO BOX 10898, PEORIA, IL 61612-0898
PO BOX 10899, PEORIA, IL 61612-0899
PO BOX 10900, PEORIA, IL 61612-0900
PO BOX 10901, PEORIA, IL 61612-0901
PO BOX 10902, PEORIA, IL 61612-0902
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