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 721, REXBURG, ID 83440-0721
PO BOX 722, REXBURG, ID 83440-0722
PO BOX 723, REXBURG, ID 83440-0723
PO BOX 724, REXBURG, ID 83440-0724
PO BOX 725, REXBURG, ID 83440-0725
PO BOX 726, REXBURG, ID 83440-0726
PO BOX 727, REXBURG, ID 83440-0727
PO BOX 728, REXBURG, ID 83440-0728
PO BOX 729, REXBURG, ID 83440-0729
PO BOX 730, REXBURG, ID 83440-0730
PO BOX 731, REXBURG, ID 83440-0731
PO BOX 732, REXBURG, ID 83440-0732
PO BOX 733, REXBURG, ID 83440-0733
PO BOX 734, REXBURG, ID 83440-0734
PO BOX 735, REXBURG, ID 83440-0735
PO BOX 736, REXBURG, ID 83440-0736
PO BOX 737, REXBURG, ID 83440-0737
PO BOX 738, REXBURG, ID 83440-0738
PO BOX 739, REXBURG, ID 83440-0739
PO BOX 740, REXBURG, ID 83440-0740
PO BOX 741, REXBURG, ID 83440-0741
PO BOX 742, REXBURG, ID 83440-0742
PO BOX 743, REXBURG, ID 83440-0743
PO BOX 744, REXBURG, ID 83440-0744
PO BOX 745, REXBURG, ID 83440-0745
PO BOX 746, REXBURG, ID 83440-0746
PO BOX 747, REXBURG, ID 83440-0747
PO BOX 748, REXBURG, ID 83440-0748
PO BOX 749, REXBURG, ID 83440-0749
PO BOX 750, REXBURG, ID 83440-0750
PO BOX 751, REXBURG, ID 83440-0751
PO BOX 752, REXBURG, ID 83440-0752
PO BOX 753, REXBURG, ID 83440-0753
PO BOX 754, REXBURG, ID 83440-0754
PO BOX 755, REXBURG, ID 83440-0755
PO BOX 756, REXBURG, ID 83440-0756
PO BOX 757, REXBURG, ID 83440-0757
PO BOX 758, REXBURG, ID 83440-0758
PO BOX 759, REXBURG, ID 83440-0759
PO BOX 760, REXBURG, ID 83440-0760
PO BOX 761, REXBURG, ID 83440-0761
PO BOX 762, REXBURG, ID 83440-0762
PO BOX 763, REXBURG, ID 83440-0763
PO BOX 764, REXBURG, ID 83440-0764
PO BOX 765, REXBURG, ID 83440-0765
PO BOX 766, REXBURG, ID 83440-0766
PO BOX 767, REXBURG, ID 83440-0767
PO BOX 768, REXBURG, ID 83440-0768
PO BOX 769, REXBURG, ID 83440-0769
PO BOX 770, REXBURG, ID 83440-0770
PO BOX 771, REXBURG, ID 83440-0771
PO BOX 772, REXBURG, ID 83440-0772
PO BOX 773, REXBURG, ID 83440-0773
PO BOX 774, REXBURG, ID 83440-0774
PO BOX 775, REXBURG, ID 83440-0775
PO BOX 776, REXBURG, ID 83440-0776
PO BOX 777, REXBURG, ID 83440-0777
PO BOX 778, REXBURG, ID 83440-0778
PO BOX 779, REXBURG, ID 83440-0779
PO BOX 780, REXBURG, ID 83440-0780
PO BOX 781, REXBURG, ID 83440-0781
PO BOX 782, REXBURG, ID 83440-0782
PO BOX 783, REXBURG, ID 83440-0783
PO BOX 784, REXBURG, ID 83440-0784
PO BOX 785, REXBURG, ID 83440-0785
PO BOX 786, REXBURG, ID 83440-0786
PO BOX 787, REXBURG, ID 83440-0787
PO BOX 788, REXBURG, ID 83440-0788
PO BOX 789, REXBURG, ID 83440-0789
PO BOX 790, REXBURG, ID 83440-0790
PO BOX 791, REXBURG, ID 83440-0791
PO BOX 792, REXBURG, ID 83440-0792
PO BOX 793, REXBURG, ID 83440-0793
PO BOX 794, REXBURG, ID 83440-0794
PO BOX 795, REXBURG, ID 83440-0795
PO BOX 796, REXBURG, ID 83440-0796
PO BOX 797, REXBURG, ID 83440-0797
PO BOX 798, REXBURG, ID 83440-0798
PO BOX 799, REXBURG, ID 83440-0799
PO BOX 800, REXBURG, ID 83440-0800
PO BOX 801, REXBURG, ID 83440-0801
PO BOX 802, REXBURG, ID 83440-0802
PO BOX 803, REXBURG, ID 83440-0803
PO BOX 804, REXBURG, ID 83440-0804
PO BOX 805, REXBURG, ID 83440-0805
PO BOX 806, REXBURG, ID 83440-0806
PO BOX 807, REXBURG, ID 83440-0807
PO BOX 808, REXBURG, ID 83440-0808
PO BOX 809, REXBURG, ID 83440-0809
PO BOX 810, REXBURG, ID 83440-0810
PO BOX 811, REXBURG, ID 83440-0811
PO BOX 812, REXBURG, ID 83440-0812
PO BOX 813, REXBURG, ID 83440-0813
PO BOX 814, REXBURG, ID 83440-0814
PO BOX 815, REXBURG, ID 83440-0815
PO BOX 816, REXBURG, ID 83440-0816
PO BOX 817, REXBURG, ID 83440-0817
PO BOX 818, REXBURG, ID 83440-0818
PO BOX 819, REXBURG, ID 83440-0819
PO BOX 820, REXBURG, ID 83440-0820
PO BOX 821, REXBURG, ID 83440-0821
PO BOX 822, REXBURG, ID 83440-0822
PO BOX 823, REXBURG, ID 83440-0823
PO BOX 824, REXBURG, ID 83440-0824
PO BOX 825, REXBURG, ID 83440-0825
PO BOX 826, REXBURG, ID 83440-0826
PO BOX 827, REXBURG, ID 83440-0827
PO BOX 828, REXBURG, ID 83440-0828
PO BOX 829, REXBURG, ID 83440-0829
PO BOX 830, REXBURG, ID 83440-0830
PO BOX 831, REXBURG, ID 83440-0831
PO BOX 832, REXBURG, ID 83440-0832
PO BOX 833, REXBURG, ID 83440-0833
PO BOX 834, REXBURG, ID 83440-0834
PO BOX 835, REXBURG, ID 83440-0835
PO BOX 836, REXBURG, ID 83440-0836
PO BOX 837, REXBURG, ID 83440-0837
PO BOX 838, REXBURG, ID 83440-0838
PO BOX 839, REXBURG, ID 83440-0839
PO BOX 840, REXBURG, ID 83440-0840
PO BOX 841, REXBURG, ID 83440-0841
PO BOX 842, REXBURG, ID 83440-0842
PO BOX 843, REXBURG, ID 83440-0843
PO BOX 844, REXBURG, ID 83440-0844
PO BOX 845, REXBURG, ID 83440-0845
PO BOX 846, REXBURG, ID 83440-0846
PO BOX 847, REXBURG, ID 83440-0847
PO BOX 848, REXBURG, ID 83440-0848
PO BOX 849, REXBURG, ID 83440-0849
PO BOX 850, REXBURG, ID 83440-0850
PO BOX 851, REXBURG, ID 83440-0851
PO BOX 852, REXBURG, ID 83440-0852
PO BOX 853, REXBURG, ID 83440-0853
PO BOX 854, REXBURG, ID 83440-0854
PO BOX 855, REXBURG, ID 83440-0855
PO BOX 856, REXBURG, ID 83440-0856
PO BOX 857, REXBURG, ID 83440-0857
PO BOX 858, REXBURG, ID 83440-0858
PO BOX 859, REXBURG, ID 83440-0859
PO BOX 860, REXBURG, ID 83440-0860
PO BOX 861, REXBURG, ID 83440-0861
PO BOX 862, REXBURG, ID 83440-0862
PO BOX 863, REXBURG, ID 83440-0863
PO BOX 864, REXBURG, ID 83440-0864
PO BOX 865, REXBURG, ID 83440-0865
PO BOX 866, REXBURG, ID 83440-0866
PO BOX 867, REXBURG, ID 83440-0867
PO BOX 868, REXBURG, ID 83440-0868
PO BOX 869, REXBURG, ID 83440-0869
PO BOX 870, REXBURG, ID 83440-0870
PO BOX 871, REXBURG, ID 83440-0871
PO BOX 872, REXBURG, ID 83440-0872
PO BOX 873, REXBURG, ID 83440-0873
PO BOX 874, REXBURG, ID 83440-0874
PO BOX 875, REXBURG, ID 83440-0875
PO BOX 876, REXBURG, ID 83440-0876
PO BOX 877, REXBURG, ID 83440-0877
PO BOX 878, REXBURG, ID 83440-0878
PO BOX 879, REXBURG, ID 83440-0879
PO BOX 880, REXBURG, ID 83440-0880
PO BOX 881, REXBURG, ID 83440-0881
PO BOX 882, REXBURG, ID 83440-0882
PO BOX 883, REXBURG, ID 83440-0883
PO BOX 884, REXBURG, ID 83440-0884
PO BOX 885, REXBURG, ID 83440-0885
PO BOX 886, REXBURG, ID 83440-0886
PO BOX 887, REXBURG, ID 83440-0887
PO BOX 888, REXBURG, ID 83440-0888
PO BOX 889, REXBURG, ID 83440-0889
PO BOX 890, REXBURG, ID 83440-0890
PO BOX 891, REXBURG, ID 83440-0891
PO BOX 892, REXBURG, ID 83440-0892
PO BOX 893, REXBURG, ID 83440-0893
PO BOX 894, REXBURG, ID 83440-0894
PO BOX 895, REXBURG, ID 83440-0895
PO BOX 896, REXBURG, ID 83440-0896
PO BOX 897, REXBURG, ID 83440-0897
PO BOX 898, REXBURG, ID 83440-0898
PO BOX 899, REXBURG, ID 83440-0899
PO BOX 900, REXBURG, ID 83440-0900
PO BOX 901, REXBURG, ID 83440-0901
PO BOX 902, REXBURG, ID 83440-0902
PO BOX 903, REXBURG, ID 83440-0903
PO BOX 904, REXBURG, ID 83440-0904
PO BOX 905, REXBURG, ID 83440-0905
PO BOX 906, REXBURG, ID 83440-0906
PO BOX 907, REXBURG, ID 83440-0907
PO BOX 908, REXBURG, ID 83440-0908
PO BOX 909, REXBURG, ID 83440-0909
PO BOX 910, REXBURG, ID 83440-0910
PO BOX 911, REXBURG, ID 83440-0911
PO BOX 912, REXBURG, ID 83440-0912
PO BOX 913, REXBURG, ID 83440-0913
PO BOX 914, REXBURG, ID 83440-0914
PO BOX 915, REXBURG, ID 83440-0915
PO BOX 916, REXBURG, ID 83440-0916
PO BOX 917, REXBURG, ID 83440-0917
PO BOX 918, REXBURG, ID 83440-0918
PO BOX 919, REXBURG, ID 83440-0919
PO BOX 920, REXBURG, ID 83440-0920
PO BOX 921, REXBURG, ID 83440-0921
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